HMI Huami Corporation

RISK FACTORS

         An investment in the ADSs involves significant risks. You should consider carefully all of the information in this prospectus, including the risks and uncertainties described below, before making an investment in the ADSs. Any of the following risks could have a material and adverse effect on our business, financial condition and results of operations. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial may also materially and adversely affect our business, prospects, financial condition, results of operations, cash flows and ability to pay dividends, and you may lose all or part of your investment.

Risks Related to Our Business

Xiaomi is our most important customer and distribution channel. Any deterioration of our relationship with Xiaomi or reduction of sales of Xiaomi Wearable Products could have a material adverse effect on our operating results.

        Xiaomi is the sole customer and distribution channel for all Xiaomi Wearable Products, and it held 14.8% of our total outstanding shares as of the date of this prospectus. For the years ended December 31, 2016, 2017 and 2018, sales of Xiaomi Wearable Products contributed 92.1%, 78.8% and 66.9% of our revenues, respectively.

        We entered into a strategic cooperation agreement with Xiaomi in October 2017, which grants us the most-preferred-partner status globally to develop future Xiaomi Wearable Products. This strategic cooperation agreement can be terminated by Xiaomi and we can therefore lose the most-preferred-partner status if we fail to meet the various requirements set out in the agreement, such as requirements on product launching timetable, product quality and annual sales target of Xiaomi Wearable Products. In addition, Xiaomi has the option to develop by itself or engage other companies to develop similar and competing products, if such companies can offer better terms and services than we do—for example such companies may ask for less profit sharing or less intellectual property rights from their cooperation with Xiaomi. The strategic cooperation agreement will expire in October 2020; we cannot assure you that we will be able to renew this agreement upon its expiry or on the same terms. If for any reason, we cannot maintain our cooperation relationship with Xiaomi or renew the strategic cooperation agreement with terms equally favorable to us as compared to those in the existing agreement, our business and operation results may be materially and adversely affected. For more details of the strategic cooperation agreement with Xiaomi, including under what circumstances it can be early terminated, please see "Item 7. Major Shareholders and Related Party Transactions—B. Related Party Transaction—Our Relationship with Xiaomi—Strategic Cooperation Agreement" of our annual report on Form 20-F for the year ended December 31, 2018.

        In addition, pursuant to our business cooperation agreement with Xiaomi, we and Xiaomi shall jointly set the retail price of Xiaomi Wearable Products (including the Mi Band Series). Because we cannot unilaterally determine the retail price of Xiaomi Wearable Products, particularly future Xiaomi Wearable Products, we cannot assure you that we will be able to continue to introduce Xiaomi Wearable Products with retail price levels that can sustain or improve our gross or net profit margins. Furthermore, marketing considerations on the part of Xiaomi and other factors beyond our control may also cause Xiaomi Wearable Products to be priced at relatively low levels that may negatively affect the gross and net profit margins of Xiaomi Wearable Products, as a result of which our business and operation results may be materially and adversely affected.

        Xiaomi is also an important distribution channel for our self-branded products. If Xiaomi is not successful in selling our products, which in turn can be due to various reasons, including lower demand, market competition and decreasing efficiency of distribution network, our revenue may decrease. Furthermore, negative publicity related to Xiaomi, including products offered by Xiaomi, the celebrities

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Xiaomi is associated with, or even the labor policies of any of Xiaomi's suppliers or manufacturers may have a material adverse effect on the sales of our products.

        In addition, Xiaomi sells a broad spectrum of electronic products through its online and offline channels. We cannot assure you that our products can always receive the same level of attention and promotion efforts from Xiaomi as they have been so far receiving. In the event that Xiaomi dedicates less resources in promoting and selling our products, our revenue may decrease as well. If we lose Xiaomi as our customer or distribution channel for any reason, we will need to build a larger distribution network on our own, which can be time and resource consuming, and there is no assurance that we can achieve that in an effective and efficient manner, or at all.

        When exercising its rights as our shareholder, Xiaomi may take into account not only the interests of our company and our shareholders but also its interests and the interests of its other affiliates. The interests of our company and our shareholders may at times conflict with the interests of Xiaomi and its affiliates. Such conflicts may result in lost corporate opportunities for our company, including opportunities to enter into lines of business that may overlap with those pursued by Xiaomi and/or the companies within its ecosystem.

If we fail to successfully and timely develop and commercialize new products, services and technologies, our operating results may be materially and adversely affected.

        Historically, sales of smart bands and watches contributed a significant majority of our revenues and our growth has been influenced by our product launches and product cycle. In particular, sales of our smart band products and watches (including Xiaomi- and Amazfit-branded products) contributed 85.8%, 86.6% and 90.7% of our total revenues in the years ended December 31, 2016, 2017 and 2018, respectively. Our future growth depends on whether we can continually develop and introduce new generations of our existing product lines and new forms of smart wearable technology with enhanced functionalities and value-added services in a timely manner. This is particularly important in the current industry landscape where technology and consumer preference evolve constantly and rapidly, which may cause our existing products to reach the end of their lifecycles prematurely and require us to introduce new products with enhanced functionalities to sustain our growth. Our capability to roll out new or enhanced products and services in turn depend on a number of factors, including timely and successful research and development efforts by us as well as our suppliers to bring cutting-edge technologies to the market, quality control of service provision and product manufacturing and the effectiveness of our distribution channels. Pursuant to our strategic cooperation agreement with Xiaomi, we are also required to consult Xiaomi regarding the product launch timetable for Xiaomi Wearable Products. If we are unable to commercialize appealing new products, functionalities, services or innovative technologies leveraging our data in a timely manner and introduce them to consumers at attractive price points compared to our existing products and competing products, or our new products, services or technologies are not accepted or adopted by consumers, our competitors may increase their market share, which could adversely impact our operating results. In addition, the research and development of new or enhanced products and services can be complex and costly. Given the complexity, we could experience delays in completing the development and introduction of new and enhanced services and products in the future. Our research and development effort may not yield the benefits we expect to achieve at all after we dedicate our time and resources into it.

        We are endeavoring to apply our products in more scenarios, and medical use is one area that we put in significant efforts. Some of our existing products monitor users' cardiac cycle, which have significant potential for medical application. For example, a doctor may use our products to monitor the cardiac cycle of his or her patients. In such applications, our products may be deemed as medical devices, and we may be required to obtain the relevant medical device registration certificate. In addition, we may be required to obtain the relevant medical device registration certificates for our existing products if any new rules or regulations promulgated by relevant governmental authorities

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classify our existing products as medical devices. We have obtained the medical device registration certificate for our ECG health band products. The process of obtaining regulatory clearances or approvals to market a medical device for our other products, however, can be costly and time consuming. We may not be able to obtain these clearances or approvals on a timely basis, or at all, in order to extend our business into the medical use wearable device market. Moreover, even if we successfully obtain the required approvals for our products, given the complex and stringent nature of regulations on medical devices, failure to comply with applicable China Food and Drug Administration (CFDA) regulations will subject us to enforcement actions such as fines, civil penalties or recalls of products, which could harm our reputation and operating results.

We operate in highly competitive markets and the scale and resources of some of our competitors may allow them to compete more effectively than we can, which could result in a loss of our market share and a decrease in our revenue and profitability.

        We offer a number of products and services and compete with a variety of competitors. For example, the smart wearables market has a multitude of participants, including consumer electronics companies specialized in smart wearable technology, such as Fitbit and Garmin; large, broad-based consumer electronics companies that either compete in our market or adjacent markets, or have announced plans to do so, such as Huawei, Apple and Samsung; traditional health and fitness companies and traditional watch companies. We also face competition from local providers of similar products in the various regions and countries where our products are distributed. Intensified competition may result in pricing pressures and reduced profit margins and may impede our ability to continue to increase the sales of our products or cause us to lose market share, any of which could substantially harm our results of operations.

        Many of our existing and potential competitors enjoy substantial competitive advantages, such as: (i) longer operating history, (ii) the capacity to leverage their sales efforts and marketing expenditures across a broader portfolio of products, (iii) more established relationships with a larger number of suppliers, contract manufacturers and channel partners, (iv) access to larger and broader user bases, (v) greater brand recognition, (vi) greater financial, research and development, marketing, distribution and other resources, (vii) more resources to make investments and acquisitions, (viii) larger intellectual property portfolios, and (ix) the ability to bundle competitive offerings with other products and services.

If we are unable to anticipate and satisfy consumer preferences in a timely manner or if technological innovation renders existing smart wearable technology non-competitive or obsolete, our business may be materially and adversely affected.

        Consumer preferences in smart wearable devices are changing rapidly and difficult to predict. Consumers may decide not to purchase our products and services as their preferences shift to different types or designs of smart wearable devices, or even move away from these categories of products and services altogether. In particular, new technologies might bring about industry-wide impacts and make the category of smart bands and watches less appealing or obsolete. In addition, our new products and services with additional features have higher prices than many of our earlier products, which may not appeal to as large a consumer base. Accordingly, if we fail to anticipate and satisfy consumer preferences in a timely manner, or if it is perceived that our future products and services will not satisfy consumer preferences, our business may be adversely affected.

        In addition, as the smart wearable technology continues to develop, the functions of smart bands and smart watches may converge, which in turn may cause our smart band product lines to compete with our smart watch product lines and inhibit our future growth.

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Our future success depends on our ability to promote our own brands and protect our reputation. The failure to establish and promote our brands, including Amazfit, and any damage to our reputation will hinder our growth.

        Since September 2015, we have begun to use the brand, "Amazfit," to sell our products that are not designed and manufactured for Xiaomi to address the middle to high-end market. Prior to that, all of our products were Xiaomi Wearable Products. We believe the strategy to establish and promote our own brand is crucial to our future success as it expands our addressable market and gives us more flexibility in terms of pricing, distribution and marketing compared to our cooperation with Xiaomi on Xiaomi Wearable Products. We have invested, and will need to continue to dedicate, significant time, efforts and resources to build our own brand recognition. Shipments of our self-branded products have increased from approximately 1.0 million units in 2017 to approximately 3.1 million units in 2018. For the years ended December 31, 2017 and 2018, revenues from our self-branded products and others segment, substantially all of which was from the sales of our self-branded products, were RMB434.4 million and RMB1,205.8 million (US$175.4 million), representing 21.2% and 33.1% of our total revenues, respectively. However, we cannot guarantee that the shipment of our self-branded products will continue to grow, or that our promotion efforts will ultimately be successful, as it involves numerous factors including the effectiveness of our marketing efforts, our ability to provide consistent, high quality products and services, and our consumers' satisfaction with the technical support and software updates we provide.

        In addition, negative publicity related to our brand, products, contract manufacturers, component suppliers, distributors, strategic partners and the celebrities we are associated with could damage and offset our effort to promote our own brands. For example, our company name in Chinese character, " ", has been preempted as a trademark by a company unaffiliated to us under certain trademark categories in China. This company currently manufactures and sells products and service lines similar to ours using this trademark. As a result, consumers may be confused and associate any quality issue on the products and services they provide with us, which will have an adverse impact on our brand image. In addition, although brand security initiatives are in place, we cannot guarantee that our efforts against the counterfeiting of our brands will be successful. If a third-party copies our products in a manner that projects lesser quality or carries a negative connotation, our brand image could be materially and adversely affected. Furthermore, our company name Huami and our brand Amazfit have been preempted as trademarks by third parties in a number of countries overseas, including Turkey (with respect to our company name), as well as Spain, Indonesia, the Philippines and Paraguay (with respect to Amazfit and related logos). While we are contesting the registration of these trademarks by such third parties in each of these countries, we cannot assure you that we will prevail in these proceedings.

We do not have internal manufacturing capabilities and rely on several contract manufacturers to produce our products. If we encounter issues with these contract manufacturers, our business, brand and results of operations could be harmed.

        We do not maintain our own manufacturing capabilities and rely on contract manufactures to produce our products. We assign the production of Mi Band series and Mi Smart Scale series to a number of manufacturers while each of our self-branded product lines is assigned to a corresponding manufacturer. We may experience operational difficulties with our manufacturers, including reductions in the availability of production capacity, failures to comply with product specifications, insufficient quality control, failures to meet production deadlines, increases in manufacturing costs and longer lead time required. Our manufacturers may experience disruptions in their manufacturing operations due to equipment breakdowns, labor strikes or shortages, natural disasters, component or material shortages, cost increases or other similar problems. In addition, we may not be able to renew contracts with our

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contract manufacturers or identify manufacturers who are capable of producing new products we target to launch in the future.

We are susceptible to supply shortages, long lead time for raw materials and components, and supply changes, any of which could disrupt our supply chain and have a material adverse impact on our results of operation because some of the key components of our products, such as Bluetooth Low Energy (BLE) system-on-chip and sensors, come from a limited number or a single source of supply.

        All of the components and raw materials used to produce our products are sourced from third-party suppliers, and some of these components are sourced from a limited number of or a single supplier. Therefore, we are subject to risks of shortages or discontinuation in supply, long lead time, cost increases and quality control issues given the limited sources of suppliers. In addition, some of our suppliers may have more established relationships with our competitors, and as a result of such relationships, such suppliers may choose to limit or terminate their relationship with us or prioritize our competitors' orders in the case of supply shortages. We have in the past experienced and may in the future experience component shortages. For example, we experienced component shortages and longer lead time for components such as PPG (photoplethysmography) sensors in 2018, due to higher than expected demand for Xiaomi Wearable Products and our smart watches product lines. In addition, as many of electronics component suppliers are concentrated in East and Southeast Asia, there have been industry-wide conditions, natural disasters and global events in the past that have caused material shortages for components, such as a shortage of flash memory in 2011 in aftermath of the tragic earthquake and tsunami in Japan. While component shortages have historically been immaterial, they could be material in the future.

        In the event of a component shortage or supply interruption from suppliers of key components, we will need to identify alternate sources of supply, which can be time-consuming, difficult and costly. We may not be able to source these components on terms that are acceptable to us, or at all, which may undermine our ability to meet our production requirements or to fill our orders in a timely manner. This could cause delays in shipment of our products, harm our relationships with our customers, distributors and users, and adversely affect our results of operations.

Our operating results could be materially harmed if we or Xiaomi is unable to accurately forecast consumer demand for our products and services or manage our inventory.

        To ensure adequate inventory supply for our products, we procure raw materials and components based on sales and production forecasts. The ability to accurately forecast demand for our products and services could be affected by many factors, including changes in customer demand for our products and services or our competitors', sales promotions by us or our competitors, sales channel inventory levels, and unanticipated changes in general market and economic conditions. In addition, as we continue to introduce new products and services, we may also face challenges managing the production plan of our existing products, which may in turn affect the inventory management for our existing products. If we or Xiaomi fails to accurately forecast customer demand, we may experience excess inventory levels or a shortage of products available for sale. After we sell Xiaomi Wearable Products to Xiaomi, Xiaomi will only have limited right of return if the products have quality issues and will largely bear the inventory risks of such products. However, inventory levels in excess of end-customer demand may still ultimately result in inventory write-downs or write-offs and the sale of excess inventory at discounted prices, which may cause our gross margin to suffer and could impair the strength of our brand. On the other hand, in the case we experience shortage of products, we may be unable to meet the demand for our products, and our business and operating results could be adversely affected. We expect that it will become more difficult to forecast demand as we introduce and develop a more diverse product portfolio and as market competition for similar products intensifies.

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We collect, store, process and use personal information and other user data, which subjects us to governmental regulations and other legal obligations related to privacy, information security, and data protection, and any security breaches or our actual or perceived failure to comply with such legal obligations could harm our brand and business.

        Exploring growth opportunities with our wealth of data is one of our key strategies. Due to the volume and sensitivity of the personal information and biometric data we collect and manage and the nature of our products, the security features of our enterprise platform and information systems are critical.

        We have adopted security policies and measures, including encryption technology, to protect our proprietary data and user information. However, our enterprise platform and information systems may be targets of attacks, such as viruses, malware or phishing attempts by cyber criminals or other wrongdoers seeking to steal our user data for financial gain or to harm our business operations or reputation. The loss, misuse or compromise of such information may result in costly investigations, remediation efforts and notification to affected users. If such content is accessed by unauthorized third parties or deleted inadvertently by us or third parties, our brand and reputation could be adversely affected. Cyber-attacks could also adversely affect our operating results, consume internal resources, and result in litigation or potential liability for us and otherwise harm our business. In addition, according to our cooperation agreement with Xiaomi, both Xiaomi and we have access and can collect and use user data of Xiaomi Wearable Products. Consequently, any leak or abuse of user data by Xiaomi may be perceived by consumers as a result of the compromise of our information security system. Any failure or perceived failure by us to prevent information security breaches or to comply with privacy policies or privacy-related legal and administrative obligations, or any compromise of security that results in the unauthorized release or transfer of personally identifiable information or other user data, could cause our users to lose trust in us and could expose us to legal claims.

        A growing number of legislative and regulatory bodies have adopted consumer notification requirements in the event of unauthorized access to or acquisition of certain types of personal data. Such breach notification laws continue to evolve and may be inconsistent from one jurisdiction to another, which might become a particular concern as we accelerate our international expansion. Complying with these obligations could cause us to incur substantial costs and could increase negative publicity surrounding any incident that compromises user data. Any failure to comply with applicable regulations could also result in regulatory enforcement actions against us.

Our intellectual property and proprietary rights may not adequately protect our products, and our business may suffer if it is alleged or determined that our technologies, products, or other aspects of our business infringe third party intellectual property or if third parties infringe our rights.

        We may fail to own or apply for key trademarks or patents on important products, services, technologies or designs in a timely fashion, or at all, both in China and overseas. For example, our company name in Chinese characters, " ", has been registered as a trademark by a company unaffiliated to us in certain trademark categories in China. As such, we currently cannot use the " " trademark in certain categories of products and our self-branded products are sold under the brand name of "Amazfit." In addition, this company currently manufactures and sells products and service lines similar to ours under the " " trademark. As a result, consumers may be confused and associate any quality issue on the products and services they provide with us, which will have an adverse impact on our brand image. Furthermore, the " " trademark in several other trademark categories—which is contractually owned jointly by Xiaomi and us—is currently registered under the name of Xiaomi alone. Xiaomi is in the process of transferring its title to us pursuant to the relevant agreement. However, in the event that the transfer process is not completed as planned, we will not be able to use " " as a trademark in these additional categories as well. We have registered "Amazfit" as our trademarks in China in several categories and in the U.S., and we are in the process of

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registering it in additional categories or in combination with logo. There can be no assurance, however, that we will be able to register the trademark of "Amazfit" in all of the categories or formats as we desire. The pending applications for registration of "Amazfit" and related logos were initially unsuccessful, challenged or rejected in Spain, Indonesia, the Philippines, Paraguay, Pakistan, India, Mexico, Japan and Peru for reasons including but not limited to third parties having already registered similar marks in those countries. Furthermore, the pending applications for the registration of "Huami" were initially unsuccessful, challenged or rejected in Turkey, Mexico, Saudi Arabia, the European Union, India, Australia, Columbia, Japan and Peru. Accordingly, it may be possible, in those foreign countries where the status of various applications is pending, unclear, challenged or rejected, for a third-party owner of the national trademark registration for a similar mark to prohibit the manufacture, sale or exportation of our products in or from that country. Failure to register our trademarks or purchase or license the right to use our trademarks or logos in these countries could limit our ability to obtain supplies from, or manufacture in, less costly markets or penetrate new markets should our business plan include selling our products in those countries.

        Various other issues may arise with respect to our intellectual property portfolio. We and Xiaomi are co-owners of certain patents, certain other intellectual properties and user data related to Xiaomi Wearable Products. There is a possibility that Xiaomi may use these intellectual properties and user data to develop and manufacture competing products on its own or engage other companies leveraging such resources to do so. In addition, we may not have sufficient intellectual property rights in all countries and regions where unauthorized third-party copying or use of our proprietary technology may occur and the scope of our intellectual property might be more limited in certain countries and regions. Our existing and future patents may not be sufficient to protect our products, services, technologies or designs and/or may not prevent others from developing competing products, services, technologies or designs. We cannot predict the validity and enforceability of our patents and other intellectual property with certainty.

        Litigation may be necessary to enforce our intellectual property rights. Initiating infringement proceedings against third parties can be expensive and time-consuming, and divert management's attention from other business concerns. We may not prevail in litigation to enforce our intellectual property against unauthorized use.

        Additionally, we receive from time to time letters alleging infringement of patents, trademarks or other intellectual property rights by us.

If we continue to grow, we may not be able to effectively manage our growth and the increased complexity of our business, which could negatively impact our brand and financial performance.

        Since our founding in December 2013, our company has experienced rapid growth. Continued growth of our business requires us to expand our product development, sales and marketing, and distribution functions, to upgrade our management information systems and other processes and technology, and to secure more space for our expanding workforce. Such expansion could increase the strain on our resources, and we could experience serious operating difficulties, including difficulties in hiring, training, and managing an increasing number of employees.

        As we only have a limited history of operating our business at its current scale, it is difficult to evaluate our current business and future prospects, including our ability to plan for and model future growth. Our limited operating experience at this scale, combined with the rapidly evolving nature of the market in which we sell our products and services, substantial uncertainty concerning how these markets may develop, and other economic factors beyond our control, reduces our ability to accurately forecast quarterly or annual revenue. As such, any predictions about our future revenue and expenses may not be as accurate as they would be if we had a longer operating history or operated in a more developed and predictable market. Failure to manage our future growth effectively could have an

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adverse effect on our business, which, in turn, could have an adverse impact on our operating results and financial condition.

We are subject to a variety of costs and risks due to our continued expansion internationally that may not be successful and could adversely affect our profitability and operating results.

        Our products have international versions that are manufactured for sales and distribution in overseas markets. The shipment volume of international versions of our products, as a percentage of our total shipment volume, increased from 12.8% in 2016 to 23.8% in 2017, and further to 44.2% in 2018. International expansion represents a large opportunity to further grow our business and enhance our competitive position, and is one of our core strategies.

        We may enter into new geographic markets where we have limited or no experience in marketing, selling, and localizing and deploying our products. International expansion has required and will continue to require us to invest significant capital and other resources and our efforts may not be successful. International sales and operations may be subject to risks such as:

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limited brand recognition (compared with our home market in China);



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costs associated with establishing new distribution networks;



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foreign consumers' preferences and customs;



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difficulties in staffing and managing foreign operations;



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burdens of complying with a wide variety of local laws and regulations, including packaging and labeling;



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adverse tax effects and foreign exchange controls making it difficult to repatriate earnings and cash;



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political and economic instability;



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trade restrictions, including sanction-related restrictions;



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differing employment practices and laws and labor disruptions;



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the imposition of government controls;



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lesser degrees of intellectual property protection;



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tariffs and customs duties and the classifications of our goods by applicable governmental bodies; and



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a legal system subject to undue influence or corruption.

        The occurrence of any of these risks could negatively affect our international business and consequently our business and operating results. In addition, the concern over these risks may also prevent us from entering into or releasing certain of our products in certain markets.

        Our current international expansion efforts primarily depend on Xiaomi's brand recognition and distribution channels in markets outside China. If we are unable to leverage such advantage in the future, such as in the event that the brand recognition of Xiaomi deteriorates or Xiaomi fails to establish its global distribution network, our expansion efforts will be hindered.

We are exposed to potential liabilities arising from the products we sell, and costs related to defective products could have a material adverse impact on us.

        Contractual disputes over warranties of our products can arise in the ordinary course of our business. In extreme situations, we may be exposed to potential personal injury liabilities as a result of

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the misuse or quality defects of the products we sell. There can be no assurance that we will not experience material product liability losses in the future, or that we will be able to defend such claims at a contained level of cost. We currently do not have product liability insurance, and we cannot assure you that we would be able to obtain insurance coverage with sufficient coverage at an acceptable cost in the future. A successful claim brought against us in excess of our available insurance coverage may have a material adverse effect on our business. Although we had insignificant volume of product replacement or product return historically, the cost of product replacements or product returns may be substantial, and we could incur substantial costs in implementing modifications to fix the defects.

        In addition, due to the nature of some of our smart wearable devices, some users have had in the past and may in the future experience skin irritations or other biocompatibility issues not uncommon with jewelry or other wearable products that stay in contact with skin for extended periods of time. There have been a limited number of reports from some users of certain of our devices experiencing skin irritations. This negative publicity could harm the sales of our products and also adversely affect our relationships with distributors and retailers that sell our products, including causing them to be reluctant to continue to sell our products. If large numbers of users experience these problems, we could be subject to enforcement actions or the imposition of significant monetary fines or other penalties by regulatory agencies, and face personal injury or class action litigation, any of which could have a material adverse impact on our business, financial condition and operating results.

        We also rely on the accuracy of sensors and our algorithms to ensure that our products can offer high measurement accuracy. Additionally, usages of our products in different physical environments or by different types of users may require delicate modification of our sensors and algorithms. There is, however, no assurance that the functionality of sensors from our suppliers or our algorithms can progress as much and as quickly to meet the demand of our users. Although we have not received any significant claims of the inaccuracy of measurements by our products in the past, these claims may occur from time to time. Such claims may further prompt warranty claims, regulatory investigations and litigation. In that case, our brand may suffer from negative publicity, which may then result in loss of consumer confidence and reduction of sales in our products.

        Furthermore, levels of warranty claims or estimated costs of warranty claims might materially affect our gross margins and operating results. Any failure to detect, prevent, or fix defects, or an increase in defects could result in a variety of consequences, including a greater number of returns and replacement of products than expected from Xiaomi or end users, and increases in warranty costs, regulatory proceedings and product recalls, which could harm our revenue and operating results. We currently offer a standard product warranty that the product will operate under normal use. For products that are sold to Xiaomi pursuant to our business cooperation agreement with Xiaomi, we offer an 18-month warranty which includes a six-month warranty to Xiaomi and an additional 12-month warranty to end-users. For products sold directly to end users, the warranty period is 12 months to end users. We generally elect to replace the defective products covered under the warranty. At the time revenue is recognized, an estimate of warranty costs in relation to the products sold is recorded as a component of cost of revenues. Therefore, the occurrence of real or perceived quality problems or material defects in our current and future products could expose us to warranty claims in excess of our current reserves. If we experience greater returns or replacement of defective products from Xiaomi or end users, or greater warranty claims, in excess of our reserves, our business, revenue, gross margin, and operating results could be harmed.

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We cooperate with a wide range of strategic partners to enable diversified application scenarios, further enhance the performance of our products and expand our sales channels. If we fail to expand or maintain the pool of our strategic partners, the number of application scenarios, the performance of our products and our sales channels may not grow or develop as quickly, or at all, which may reduce the attractiveness of our products. Any underperformance or negative publicity of our strategic partners may also adversely affect our operating results.

        It requires resources and contributions from a variety of market players to capitalize on the data and user base that we have accumulated so far. We have been actively seeking strategic cooperation opportunities on this front to create diverse application scenarios of our products. Furthermore, we have been pursuing collaborative relationships with leading wearable hardware companies with advanced know-how in order to develop increasingly sophisticated products, as well as partnership opportunities to expand our sales channels. We anticipate that we will continue to leverage strategic relationships with existing strategic partners to grow our business while pursuing new relationships with additional strategic partners. Pursuing, establishing and maintaining relationships with strategic partners require significant time and resources. If we fail to expand or maintain the pool of our partners, the growth of application scenarios, the development and performance of our products and the expansion of our sales channels may slow down or even wither, which in turn may affect the willingness of our users to purchase our products.

        As in any cooperation relationship, the success of our initiatives to extend the application scenarios of and further drive the performance of our products, as well as our sales channels, together with our strategic partners involves many factors beyond our control. Additionally, there can be no assurances that our choices of strategic partners can always deliver satisfactory performance to our users, that our strategic partners would not replace us with any of our competitors, and that our current strategic partners would not leave the market. Further, as we associate ourselves with these strategic partners in providing services, any negative publicity on them may also have adverse impact on our own reputation.

Our future success depends on the continuing efforts of our key employees, including our founder Mr. Wang Huang, and on our ability to attract and retain highly skilled personnel and senior management.

        Our future success depends, in part, on our ability to continue to attract and retain highly skilled personnel. In particular, we are highly dependent on the contributions of our founder Mr. Wang Huang, as well as other members of our senior management team. The loss of any key personnel could be disruptive to our operations and research and development activities, reduce our employee retention and revenue, and impair our ability to compete.

Certain director may have conflicts of interest.

        One of our directors Mr. De Liu is also a co-founder and a senior vice president of Xiaomi. Such association may give rise to potential conflicts of interest, especially with regarding to our business cooperation with Xiaomi. Directors of our company are required by law to act honestly and in good faith with a view to the best of our interests and to disclose any interest that they may have in any of our projects or opportunities. In addition, we have adopted a code of ethics and an audit committee charter. The code of ethics provides that an interested director needs to refrain from participating in any discussion among senior officers of our company relating to an interested business and may not be involved in any proposed transaction with such interested business. Furthermore, the audit committee charter provides that most related party transactions must be pre-approved by the audit committee, a majority of which consists of independent directors. Our audit committee charter, however, exempts the pre-approval requirement for related party transactions that are immaterial to us or not unusual by nature. In the event of such transactions with Xiaomi, Mr. Liu will still be entitled to vote in our board meeting, and we cannot assure you that Mr. Liu's decision will not be impacted by any potential conflict of interest arising from his relationship with Xiaomi.

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We have granted, and may continue to grant, options and other types of awards under our share incentive plan, which may result in increased share-based compensation expenses.

        We adopted a share incentive plan in 2015 and 2018, which we refer to as the 2015 Plan and the 2018 Plan, respectively, in this prospectus, for the purpose of granting share-based compensation awards to employees, directors and consultants to incentivize their performance and align their interests with ours. We recognize expenses in our consolidated statement of income in accordance with U.S. GAAP. Under our two share incentive plans, we are authorized to grant options and other types of awards. The maximum aggregate number of shares which may be issued pursuant to all awards under the 2015 Plan is 14,328,358 Class A ordinary shares. The maximum aggregate number of shares which may be issued initially pursuant to all awards under the 2018 Plan is 9,559,607 ordinary shares. The number of shares reserved for future issuances under the 2018 Plan will be increased by (i) a number equal to 1.0% of the total number of outstanding shares, or (ii) such number of shares as may be determined by our board of directors, on the first day of each calendar year during the term of the 2018 Plan beginning in 2018. As of March 31, 2019, awards to purchase 13,808,028 Class A ordinary shares under the 2015 Plan have been granted and outstanding, excluding awards that were forfeited or cancelled after the relevant grant dates. As of March 31, 2019, awards to purchase 7,160,025 Class A ordinary shares under the 2018 Plan have been granted and outstanding, excluding awards that were forfeited or cancelled after the relevant grant dates. Some of our outstanding awards set the completion of an initial public offering of our ordinary shares as a performance condition for vesting. As a result, a number of awards have become vested when we completed our initial public offering, and we recorded a significant share-based compensation expense on the completion date of our initial public offering. As of December 31, 2018, our unrecognized share-based compensation expenses amounted to RMB105.4 million (US$15.3 million).

        We believe the granting of share-based awards is of significant importance to our ability to attract and retain key personnel and employees, and we will continue to grant share-based compensation to employees in the future. As a result, our expenses associated with share-based compensation may increase, which may have an adverse effect on our results of operations.

        Competition for highly skilled personnel is often intense and we may incur significant costs or not successful in attracting, integrating, or retaining qualified personnel to fulfill our current or future needs. We have, from time to time, experienced, and we expect to continue to experience, difficulty in hiring and retaining highly skilled employees with appropriate qualifications. In addition, if any of our senior management or key personnel joins a competitor or forms a competing company, we may lose knowhow, trade secrets, business partners and key personnel. Furthermore, perspective candidates and existing employees often consider the value of the equity awards they receive in connection with their employment. Thus, our ability to attract or retain highly skilled employees may be adversely affected by declines in the perceived value of our equity or equity awards. Furthermore, there are no assurances that the number of shares reserved for issuance under our share incentive plans will be sufficient to grant equity awards adequate to recruit new employees and to compensate existing employees.

Higher labor costs and inflation may adversely affect our business and our profitability.

        Labor costs in China have risen in recent years as a result of the enactment of new labor laws and social development. Given our contract manufacturers are currently all located in China, rising labor costs in China will increase their costs, which in turn may be reflected in the manufacturing fees charged by these contract manufacturers to us.

        In addition, we have witnessed growing inflation rates in many areas of the world, and particularly in Asia where we procure most of our raw materials, which adversely affects us and our suppliers alike.

        The rising costs as a result of higher labor cost of our contract manufacturers and increasing raw material price, on the other hand, cannot be easily passed to end consumers in the form of higher

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retail sale prices due to severe competition in the smart wearable device market. Our profitability therefore may be adversely affected if labor cost and inflation continue to rise in the future.

Our business is subject to seasonal fluctuations and if our sales fall below our forecasts, our overall financial conditions and results of operations could be adversely affected.

        Our business is subject to seasonal fluctuations, which may be caused by product launches and various promotional events hosted by our distributors. Our revenues have been higher in the fourth quarter each year primarily as a result of (i) holiday sales for Black Friday and Cyber Monday and during the lead-up to Christmas and (ii) promotional events organized by TMall and other e-commerce platforms. Accordingly, any shortfall in expected fourth quarter revenue would adversely affect our annual operating results.

        Furthermore, our rapid growth may obscure the extent to which seasonality trends have affected our business. Accordingly, yearly or quarterly comparisons of our operating results may not be useful and our results in any particular period will not necessarily be indicative of the results to be expected for any future period.

You should not rely on our Mobile App MAU or number of registered users metrics as indicators of future retention of users, continual user engagement or other revenue opportunities.

        Our MAU metric tracks the number of the accounts that have been logged into on our mobile apps during a given calendar month. Our number of registered users metric tracks the number of users who have completed the registration process on our mobile apps as of a specified date. They do not fully capture the frequency and duration that users engage with our devices as users may not sign in or stay logged in on our mobile apps when using our devices. The Mobile App MAU and the number of registered users metrics only represent the potential size or growth of our user community and are not necessarily indicators of the actual size and growth of our user community. In addition, most of the services provided on our mobile apps currently are offered to users for free once they have purchased our smart wearable devices. Therefore, our Mobile App MAU metric should not be relied upon as an indicator of the level of retention of individual users in the future, continual user engagement or the potential size and growth of our user community, all of which are indicators for other potential revenue opportunities.

We may engage in acquisition and investment activities, which could require significant management attention, disrupt our business, dilute shareholder value, and adversely affect our operating results.

        As part of our business strategy, we may acquire or make investments in other companies, products, or technologies to enhance the features and functionality of our devices, and accelerate the expansion of our platform and network of strategic partners. We may not be able to find suitable acquisition or investment candidates and we may not be able to complete acquisition and investment on favorable terms, if at all. If we do complete acquisition and investment as we expect, we may not ultimately strengthen our competitive position or achieve our goals; and any acquisition and investment we complete could be viewed negatively by users or investors. In addition, if we fail to successfully integrate such acquisitions, or the technologies associated with such acquisitions, into our company, the revenue and operating results of the combined company could be adversely affected.

        Acquisitions and investments may disrupt our ongoing operations, divert management from their primary responsibilities, subject us to additional liabilities, increase our expenses, and adversely impact our business, financial condition, operating results, and cash flows. We may not accurately forecast the financial impact of an acquisition or investment transaction, including accounting charges. We would have to pay cash, incur debt, or issue equity securities to pay for any such acquisition and investment, each of which may affect our financial condition or the value of our capital stock and could result in

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dilution to our shareholders. We had RMB259.4 million (US$37.7 million) of short-term and long-term investments as of December 31, 2018.

        Furthermore, our financial results could be adversely affected by our investments or acquisitions. The investments and acquired assets or businesses may not generate the financial results we expect. They could result in the occurrence of significant investments and goodwill impairment charges, and amortization expenses for other intangible assets. Most of our investee companies are in their early stages and may not be able to achieve profitability or generate positive operating cash flows in the near future. A partial or complete loss of our investments in these investee companies is possible.

        Additionally, we may receive indications of interest from other parties interested in acquiring some or all of our business. The time required to evaluate such indications of interest could require significant attention from management, disrupt the ordinary functioning of our business, and adversely affect our operating results.

An economic downturn or economic uncertainty may adversely affect consumer discretionary spending and demand for our products and services.

        Our products and services may be considered discretionary items for consumers. Factors affecting the level of consumer spending for such discretionary items include general economic conditions, and other factors, such as consumer confidence in future economic conditions, fears of recession, the availability and cost of consumer credit, levels of unemployment, and tax rates. As global economic uncertainty remains, trends in consumer discretionary spending also remain unpredictable and subject to reductions. Unfavorable economic conditions may lead consumers to delay or reduce purchases of our products and services and consumer demand for our products and services may not grow as we expect. Our sensitivity to economic cycles and any related fluctuation in consumer demand for our products and services may have an adverse effect on our operating results and financial condition.

        In addition, the global macroeconomic environment is facing challenges. There is considerable uncertainty over the long-term effects of the expansionary monetary and fiscal policies adopted by the central banks and financial authorities of some of the world's leading economies, including the United States and China. There have been concerns over unrest and terrorist threats in the Middle East, Europe and Africa and over the conflicts involving Ukraine, Syria and North Korea. There have also been concerns on the relationship among China and other Asian countries, which may result in or intensify potential conflicts in relation to territorial disputes, and the possibility of a trade war between the United States and China. In addition, the U.K. held a referendum on June 23, 2016 on its membership in the E.U., in which a majority of voters in the U.K. voted to exit the E.U. (commonly referred to as "Brexit"). The U.K.'s departure schedule from the E.U. remains uncertain. Brexit could adversely affect European and worldwide economic and market conditions and could contribute to instability in global financial and foreign exchange markets. It is unclear whether these challenges and uncertainties will be contained or resolved, and what effects they may have on the global political and economic conditions in the long term.

We are subject to governmental economic sanctions laws that could subject us to liability and impair our ability to compete in international markets.

        Exports of our products must be made in compliance with various economic and trade sanctions laws in different jurisdictions. For example, U.S. economic sanctions prohibit the provision of products and services to countries, governments, and persons targeted by U.S. sanctions. Even though we take precautions to prevent our products from being provided to the targets of U.S. sanctions, our products, including our firmware updates, could be provided to those targets through independent distributors despite such precautions. Any such provision could have negative consequences, including government investigations, penalties and reputational harm. We could be subject to future enforcement action with

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respect to compliance with governmental economic sanctions laws, which could result in penalties and costs and consequentially have a material effect on our business and operating results.

Any significant cybersecurity incident or disruption of our information technology systems or those of third-party partners could materially damage user relationships and subject us to significant reputational, financial, legal and operation consequences.

        We depend on our information technology systems, as well as those of third parties, to develop new products and services, operate our platform, host and manage our services, store data, process transactions, respond to user inquiries, and manage inventory and our supply chain. Any material disruption or slowdown of our systems or those of third parties whom we depend upon, including a disruption or slowdown caused by our failure to successfully manage significant increases in user volume, could cause outages or delays in our services, particularly in the form of interruption of services delivered by our mobile applications, which could harm our brand and adversely affect our operating results. We rely on cloud servers maintained by cloud service providers to store our data, and the majority of the data we collected are hosted at Xiaomi's cloud servers. Problems with our cloud service providers or the telecommunications network providers with whom they contract could adversely affect the experience of our users. Our cloud service providers could decide to cease providing us services without adequate notice. Any change in service levels at our cloud servers or any errors, defects, disruptions, or other performance problems with our platform could harm our brand and may damage the data of our users. If changes in technology cause our information systems, or those of third parties whom we depend upon, to become obsolete, or if our or their information systems are inadequate to handle our growth, we could lose users and our business and operating results could be adversely affected.

        We have adopted security policies and measures, including encryption technology, to protect our proprietary data and user information. However, advances in technology, the expertise of hackers, new discoveries in the field of cryptography or other events or developments could result in a compromise or breach of the technology that we use to protect confidential information. We may not be able to prevent third parties, especially hackers or other individuals or entities engaging in similar activities, from illegally obtaining such confidential or private information we hold by using our products and mobile apps. Such individuals or entities obtaining our users' confidential or private information may further engage in various other illegal activities using such information. Any negative publicity on the safety or privacy protection mechanisms and policies, and any claims asserted against us or fines imposed upon us as a result of actual or perceived failures, could have a material and adverse effect on our public image, reputation, financial condition and results of operations.

        Practices regarding the collection, use, storage, transmission and security of personal information by companies operating over the internet and mobile platforms are under increased public scrutiny. As smart wearable and AI technologies continue to evolve, we believe that increased regulation by the PRC government of data privacy on the internet is likely. We may become subject to new laws and regulations applying to the collection, processing or use of personal or user information that could affect how we store, process and share data with our users and partners. For example, the General Administration of Quality Supervision, Inspection and Quarantine and Standardization Administration jointly issued the Standard of Information Security Technology—Personal Information Security Specification, which has come into effect in May 2018. Pursuant to this new standard, personal data controllers, i.e., entities or persons who are authorized to determine the purposes and methods for using and processing personal information, should collect information in accordance with the principles of legality and minimization and should also obtain a consent from the information provider. In addition, we may need to comply with increasingly complex and rigorous regulatory standards enacted to protect business and personal data in the United States, Europe and elsewhere. For example, the European Union adopted the General Data Protection Regulation, or the GDPR, which became

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effective on May 25, 2018. The GDPR imposes additional obligations on companies regarding the handling of personal data and provides certain individual privacy rights to persons whose data is stored. In addition, in the United States, the Health Insurance Portability and Accountability Act, or HIPAA, governs the privacy and security of health information and require that covered entities, including most health care providers, implement administrative, physical, and technical safeguards to protect the security of individually identifiable health information that is maintained or transmitted electronically. Violations of the HIPAA privacy and security regulations could result in significant civil and criminal penalties. Compliance with existing, proposed and recently enacted laws (including implementation of the privacy and process enhancements called for under GDPR) and regulations can be costly; any failure to comply with these regulatory standards could subject us to legal and reputational risks.

        We generally comply with industry standards and are subject to the terms of our own privacy policies. Compliance with any additional laws could be expensive, and may place restrictions on the conduct of our business and the manner in which we interact with our customers. Any failure to comply with applicable regulations could also result in regulatory enforcement actions against us, and the misuse of or failure to secure personal information could also result in violation of data privacy laws and regulations, proceedings against us by governmental entities or others, damage our reputation and credibility and could have a negative impact on revenues and profits.

        Significant capital and other resources may be required to protect against information security breaches or to alleviate problems caused by such breaches or to comply with our privacy policies or privacy-related legal obligations. The resources required may increase over time as the methods used by hackers and others engaged in online criminal activities are increasingly sophisticated and constantly evolving. Any failure or perceived failure by us to prevent information security breaches or to comply with privacy policies or privacy-related legal obligations, or any compromise of security that results in the unauthorized release or transfer of personally identifiable information or other customer data, could cause our customers to lose trust in us and could expose us to legal claims. Any perception by the public that online transactions or the privacy of user information are becoming increasingly unsafe or vulnerable to attacks could inhibit the growth of our business in general, which may reduce the number of orders we receive.

Our use of open source software could negatively affect our ability to sell our products and subject us to possible litigation.

        Some of the technologies we use incorporate open source software, and we may incorporate open source software in the future. Such open source software is generally licensed by its authors or other third parties under open source licenses. These licenses may subject us to certain unfavorable conditions, including requirements that we offer our products and services that incorporate the open source software for no cost, that we make publicly available the source code for any modifications we made or derivative works we created based upon, incorporating, or using the open source software, or that we license such modifications or derivative works under the terms of the particular open source license. Additionally, if a third-party software provider has incorporated open source software into the software that we license from such provider, we could be required to disclose or provide at no cost any of our source code that incorporates or is a modification of such licensed software. If the author or other third party distributor of the open source software that we use or license were to allege that we had not complied with the conditions of the applicable license, we could be required to incur significant legal expenses defending against such allegations and could be subject to significant damages and enjoined from the sale of our products and services that contained the open source software. Any of the foregoing could disrupt the distribution and sale of our products and services and harm our business.

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We do not maintain insurance coverage which could expose us to significant costs and business disruption.

        We do not maintain liability insurance coverage for our products and business operation. A successful liability claim against us due to injuries suffered by our users could materially and adversely affect our financial conditions, results of operations and reputation. In addition, we do not have any business disruption insurance. Any business disruption event could result in substantial cost to us and diversion of our resources.

If we fail to implement and maintain an effective system of internal controls, we may be unable to accurately or timely report our results of operations or prevent fraud, and investor confidence and the market price of our ADSs may be materially and adversely affected.

        We are subject to the reporting obligations under the U.S. securities laws. The Securities and Exchange Commission, or SEC, as required under Section 404 of the Sarbanes-Oxley Act of 2002, has adopted rules requiring a public company to include a report of management on the effectiveness of such company's internal control over financial reporting in its annual report on Form 20-F. In addition, once we cease to be an "emerging growth company," as such term is defined in the Jumpstart Our Business Startups Act of 2012 (as amended by the Fixing America's Surface Transportation Act of 2015), or the JOBS Act, an independent registered public accounting firm for a public company must issue an attestation report on the effectiveness of our internal control over financial reporting.

        In the course of auditing our consolidated financial statements for the fiscal year ended December 31, 2017, we and our independent registered public accounting firm identified two material weaknesses in our internal control over financial reporting as well as other control deficiencies, in accordance with the standards established by the PCAOB. As defined in the U.S. Public Company Accounting Oversight Board Auditing Standard, a "material weakness" is a deficiency, or a combination of deficiencies, in internal cover over financial reporting, such that there is a reasonable possibility that a material misstatement of the company's annual or interim financial statements will not be prevented or detected on a timely basis. The material weaknesses identified related to (i) our lack of accounting personnel with appropriate knowledge of U.S. GAAP and (ii) our lack of comprehensive accounting policies and procedures manual in accordance with U.S. GAAP. We have taken actions to remediate those material weaknesses in 2018, including hiring personnel with appropriate knowledge of U.S. GAAP and completing a comprehensive accounting policies and procedures manual in accordance with U.S. GAAP.

        We and our independent registered public accounting firm, in the course of auditing our consolidated financial statements for the year ended December 31, 2018, identified one material weakness. The material weakness identified related to lack of adequate supervisory review over the appropriate accounting treatment of complex transactions (including some of our equity transactions consummated prior to the initial public offering of our ADSs that were treated as a deemed dividend) to ensure that such transactions were in compliance with U.S. GAAP. This identified material weakness impacted our interim reporting during 2018 and could affect our ability to accurately and timely report our financial results in accordance with U.S. GAAP and detect or prevent material misstatements of our annual or interim financial statements on a timely basis prospectively. As a result of the identification of this material weakness, we have been taking measures to remedy this control deficiency. However, we can give no assurance that the implementation of these measures will be sufficient to eliminate this material weakness or any other material weakness or significant deficiency in our internal control over financial reporting will not be identified in the future. Our failure to implement and maintain effective internal controls over financial reporting could result in errors in our financial statements that could result in a restatement of our financial statements, cause us to fail to meet our reporting obligations and cause investors to lose confidence in our reported financial information, which may result in volatility in and a decline in the market price of the ADSs.

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        During the course of documenting and testing our internal control procedures, in order to satisfy the requirements of Section 404, we may identify other weaknesses and deficiencies in our internal control over financial reporting. In addition, if we fail to maintain the adequacy of our internal control over financial reporting, as these standards are modified, supplemented or amended from time to time, we may not be able to conclude on an ongoing basis that we have effective internal control over financial reporting in accordance with Section 404. Moreover, even if our management concludes that our internal control over financial reporting is effective, our independent registered public accounting firm, after conducting its own independent testing, may issue a report that is qualified if it is not satisfied with our internal controls or the level at which our controls are documented, designed, operated or reviewed, or if it interprets the relevant requirements differently from us.

        If we fail to achieve and maintain an effective internal control environment, we could suffer material misstatements in our financial statements and fail to meet our reporting obligations, which would likely cause investors to lose confidence in our reported financial information. This could in turn limit our access to capital markets, harm our results of operations, and lead to a decline in the trading price of our ADSs. Additionally, ineffective internal control over financial reporting could expose us to increased risk of fraud or misuse of corporate assets and subject us to potential delisting from the stock exchange on which we list, regulatory investigations and civil or criminal sanctions. We may also be required to restate our financial statements from prior periods.

Shutdowns of the U.S. federal government could materially impair our business and financial condition.

        Development of our product candidates and/or regulatory approval may be delayed for reasons beyond our control. For example, over the last several years the U.S. government has shut down several times and certain regulatory agencies, such as the Securities and Exchange Commission, or SEC, have had to furlough critical SEC and other government employees and stop critical activities. In our operations as a public company, future government shutdowns could impact our ability to access the public markets, such as through delaying the declaration of effectiveness of registration statements, and obtain necessary capital in order to properly capitalize and continue our operations.

Changes in U.S. and international trade policies, particularly with regard to China, may adversely impact our business and operating results.

        The U.S. government has recently made statements and taken certain actions that may lead to potential changes to U.S. and international trade policies, including imposing several rounds of tariffs affecting certain products manufactured in China. It is unknown whether and to what extent new tariffs (or other new laws or regulations) will be adopted, or the effect that any such actions would have on us or our industry and customers. While cross-border business between China and the U.S. may not be an area of our focus, any unfavorable government policies on international trade, such as capital controls or tariffs, may affect the demand for our products and services, impact the competitive position of our products or prevent us from being able to sell products in certain countries. If any new tariffs, legislation and/or regulations are implemented, or if existing trade agreements are renegotiated or, in particular, if the U.S. government takes retaliatory trade actions due to the recent U.S.-China trade tension, such changes could have an adverse effect on our business, financial condition and results of operations.

Recent disruptions in the financial markets and economic conditions could affect our ability to raise capital.

        In recent years, the United States and global economies suffered dramatic downturns as the result of a deterioration in the credit markets and related financial crisis as well as a variety of other factors including, among other things, extreme volatility in security prices, severely diminished liquidity and credit availability, ratings downgrades of certain investments and declining valuations of others. The United States and certain foreign governments have taken unprecedented actions in an attempt to

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address and rectify these extreme market and economic conditions by providing liquidity and stability to the financial markets. If the actions taken by these governments are not successful, the return of adverse economic conditions may cause a significant adverse impact on our ability to raise capital, if needed, on a timely basis and on acceptable terms or at all.

Risks Related to Our Corporate Structure

If the PRC government finds that the agreements that establish the structure for operating some of our operations in China do not comply with PRC regulations relating to the relevant industries, or if these regulations or the interpretation of existing regulations change in the future, we could be subject to severe penalties or be forced to relinquish our interests in those operations.

        Our WFOE has entered into a series of contractual arrangements with our VIEs and their respective shareholders, respectively, which enable us to (i) exercise effective control over our VIEs, (ii) receive substantially all of the economic benefits of our VIEs, and (iii) have an exclusive option to purchase all or part of the equity interests and assets in our VIEs when and to the extent permitted by PRC law. As a result of these contractual arrangements, we have control over and are the primary beneficiary of our VIEs and hence consolidate their financial results into our consolidated financial statements under U.S. GAAP. See "Item 4. Information on the Company—C. Organizational Structure" of our annual report on Form 20-F for the year ended December 31, 2018 for further details.

        In the opinion of Zhong Lun Law Firm, our PRC legal counsel, (i) the ownership structures of our VIEs in China and our WFOE comply with all existing PRC laws and regulations; and (ii) the contractual arrangements between our WFOE, our VIEs and their respective shareholders governed by PRC law are valid, binding and enforceable, and will not result in any violation of PRC laws or regulations currently in effect. However, our PRC legal counsel has also advised us that there are substantial uncertainties regarding the interpretation and application of current and future PRC laws, regulations and rules. Accordingly, the PRC regulatory authorities may take a view that is contrary to the opinion of our PRC legal counsel. It is uncertain whether any new PRC laws or regulations relating to variable interest entity structures will be adopted or if adopted, what they would provide. If we or any of our VIEs are found to be in violation of any existing or future PRC laws or regulations, or fail to obtain or maintain any of the required permits or approvals, the relevant PRC regulatory authorities would have broad discretion to take action in dealing with such violations or failures, including:

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discontinuing or placing restrictions or onerous conditions on our operations through any transactions between our WFOE and our VIEs;



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imposing fines, confiscating the income from our WFOE or our VIEs, or imposing other requirements with which we or our VIEs may not be able to comply;



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requiring us to restructure our ownership structure or operations, including terminating the contractual arrangements with our VIEs and deregistering the equity pledges of our VIEs, which in turn would affect our ability to consolidate, derive economic interests from, or exert effective control over our VIEs; or



•

restricting or prohibiting our use of the proceeds of this offering to finance our business and operations in China.

        The imposition of any of these penalties would result in a material and adverse effect on our ability to conduct our business. In addition, it is unclear what impact the PRC government actions would have on us and on our ability to consolidate the financial results of our VIEs in our consolidated financial statements, if the PRC government authorities were to find our legal structure and contractual arrangements to be in violation of PRC laws and regulations. If the imposition of any of these government actions causes us to lose our right to direct the activities of our VIEs or our right to receive substantially all the economic benefits and residual returns from our VIEs and we are not able

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to restructure our ownership structure and operations in a satisfactory manner, we would no longer be able to consolidate the financial results of our VIEs in our consolidated financial statements. Either of these results, or any other significant penalties that might be imposed on us in this event, would have a material adverse effect on our financial condition and results of operations.

We rely on contractual arrangements with our VIEs and their shareholders for a large portion of our business operations, which may not be as effective as direct ownership in providing operational control.

        We have relied and expect to continue to rely on contractual arrangements with our VIEs and their shareholders to conduct certain of our key businesses. These contractual arrangements may not be as effective as direct ownership in providing us with control over our VIEs. For example, our VIEs and their shareholders could breach their contractual arrangements with us by, among other things, failing to conduct their operations in an acceptable manner or taking other actions that are detrimental to our interests.

        If we had direct ownership of our VIEs, we would be able to exercise our rights as a shareholder to effect changes in the board of directors of our VIEs, which in turn could implement changes, subject to any applicable fiduciary obligations, at the management and operational level. However, under the current contractual arrangements, we rely on the performance by our VIEs and their respective shareholders of their obligations under the contracts to exercise control over our VIEs. However, the shareholders of our consolidated VIEs may not act in the best interests of our company or may not perform their obligations under these contracts. Such risks exist throughout the period in which we intend to operate certain portions of our business through the contractual arrangements with our VIEs. If any disputes relating to these contracts remains unresolved, we will have to enforce our rights under these contracts through the operations of PRC law and arbitration, litigation and other legal proceedings and therefore will be subject to uncertainties in the PRC legal system. See "—Any failure by our VIEs or their shareholders to perform their obligations under our contractual arrangements with them would have a material and adverse effect on our business." Therefore, our contractual arrangements with our VIEs may not be as effective in ensuring our control over the relevant portion of our business operations as direct ownership would be.

Any failure by our VIEs or their shareholders to perform their obligations under our contractual arrangements with them would have a material and adverse effect on our business.

        We refer to the shareholders of each of our VIEs as its nominee shareholders because although they remain the holders of equity interests on record in each of our VIEs, pursuant to the terms of the relevant power of attorney, each such shareholder has irrevocably authorized our WFOE to exercise his, her or its rights as a shareholder of the relevant VIE. However, if our VIEs or their shareholders fail to perform their respective obligations under the contractual arrangements, we may have to incur substantial costs and expend additional resources to enforce such arrangements. We may also have to rely on legal remedies under PRC law, including seeking specific performance or injunctive relief, and claiming damages, which we cannot assure will be effective under PRC law. For example, if the shareholders of our VIEs refuse to transfer their equity interest in our VIEs to us or our designee if we exercise the purchase option pursuant to these contractual arrangements, or if they otherwise act in bad faith toward us, then we may have to take legal actions to compel them to perform their contractual obligations.

        All of the agreements under our contractual arrangements are governed by PRC law and provide for the resolution of disputes through arbitration in China. Accordingly, these contracts would be interpreted in accordance with PRC law and any disputes would be resolved in accordance with PRC legal procedures. The legal system in the PRC is not as developed as in some other jurisdictions, such as the United States. As a result, uncertainties in the PRC legal system could limit our ability to enforce these contractual arrangements. See "—Uncertainties with respect to the PRC legal system and

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changes in laws and regulations in China could adversely affect us, and any lack of requisite approvals, licenses or permits applicable to our business may have a material adverse effect on our business and results of operations." Meanwhile, there are very few precedents and little formal guidance as to how contractual arrangements in the context of a VIE should be interpreted or enforced under PRC law. There remain significant uncertainties regarding the ultimate outcome of such arbitration should legal action become necessary. In addition, under PRC law, rulings by arbitrators are final, parties cannot appeal the arbitration results in courts, and if the losing parties fail to carry out the arbitration awards within a prescribed time limit, the prevailing parties may only enforce the arbitration awards in PRC courts through arbitration award recognition proceedings, which would require additional expenses and delay. In the event we are unable to enforce these contractual arrangements, or if we suffer significant delays or other obstacles in the process of enforcing these contractual arrangements, we may not be able to exert effective control over our VIEs, and our ability to conduct our business may be negatively affected.

The shareholders of our VIEs may have potential conflicts of interest with us, which may materially and adversely affect our business and financial condition.

        The shareholders of our VIEs may have potential conflicts of interest with us. These shareholders may breach, or cause our VIEs to breach, or refuse to renew, the existing contractual arrangements we have with them and our VIEs, which would have a material and adverse effect on our ability to effectively control our VIEs and receive economic benefits from them. For example, the shareholders may be able to cause our agreements with our VIEs to be performed in a manner adverse to us by, among other things, failing to remit payments due under the contractual arrangements to us on a timely basis. We cannot assure you that when conflicts of interest arise any or all of these shareholders will act in the best interests of our company or such conflicts will be resolved in our favor. Currently, we do not have any arrangements to address potential conflicts of interest between these shareholders and our company. If we cannot resolve any conflict of interest or dispute between us and these shareholders, we would have to rely on legal proceedings, which could result in disruption of our business and subject us to substantial uncertainty as to the outcome of any such legal proceedings.

Contractual arrangements in relation to our VIEs may be subject to scrutiny by the PRC tax authorities and they may determine that we or our PRC VIEs owe additional taxes, which could negatively affect our financial condition and the value of your investment.

        Under applicable PRC laws and regulations, arrangements and transactions among related parties may be subject to audit or challenge by the PRC tax authorities. We could face material and adverse tax consequences if the PRC tax authorities determine that the VIE contractual arrangements were not entered into on an arm's length basis in such a way as to result in an impermissible reduction in taxes under applicable PRC laws, rules and regulations, and adjust the income of our VIEs in the form of a transfer pricing adjustment. A transfer pricing adjustment could, among other things, result in a reduction of expense deductions recorded by our VIEs for PRC tax purposes, which could in turn increase its tax liabilities without reducing our WFOE's tax expenses. In addition, the PRC tax authorities may impose late payment fees and other penalties on our VIEs for the adjusted but unpaid taxes according to the applicable regulations. Our financial position could be materially and adversely affected if our VIEs' tax liabilities increase or if it is required to pay late payment fees and other penalties.

We may lose the ability to use and enjoy assets held by our VIEs that are material to the operation of certain portion of our business if our VIEs go bankrupt or become subject to a dissolution or liquidation proceeding.

        As part of our contractual arrangements with our VIEs, our VIEs and their subsidiaries hold certain assets that are material to the operation of certain portion of our business, including intellectual

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property and premise. If our VIEs go bankrupt and all or part of its assets become subject to liens or rights of third-party creditors, we may be unable to continue some or all of our business activities, which could materially and adversely affect our business, financial condition and results of operations. Under the contractual arrangements, our VIEs may not, in any manner, sell, transfer, mortgage or dispose of their assets or legal or beneficial interests in the business without our prior consent. If our VIEs undergo a voluntary or involuntary liquidation proceeding, independent third-party creditors may claim rights to some or all of these assets, thereby hindering our ability to operate our business, which could materially and adversely affect our business, financial condition and results of operations.

Our current corporate structure and business operations may be affected by the newly enacted Foreign Investment Law

        On March 15, 2019, the National People's Congress promulgated the Foreign Investment Law or the FIL, which will take effect on January 1, 2020,and replace the existing laws regulating foreign investment in China, namely, the PRC Equity Joint Venture Law, the PRC Cooperative Joint Venture Law and the Wholly Foreign-owned Enterprise Law, or Existing FIE Laws, together with their implementation rules and ancillary regulations. The FIL embodies an expected PRC regulatory trend to rationalize its foreign investment regulatory regime in line with prevailing international practice and the legislative efforts to unify the corporate legal requirements for both foreign and domestic investments.

        As it is newly adopted, uncertainties still exist in relation to interpretation and implementation of the FIL, especially in regard to, including, among other things, the nature of variable interest entities contractual arrangements, the promulgation schedule of both the "negative list" under the FIL and specific rules regulating the organization form of foreign-invested enterprises within the five-year transition period. The FIL does not explicitly classify whether variable interest entities that are controlled through contractual arrangements would be deemed as foreign-invested enterprises, but it has a catch-all provision under the definition of "foreign investment" that includes investments made by foreign investors in China through other means as provided by laws, administrative regulations or rules of the State Council, so there is still a possibility for future laws, administrative regulations or provisions of the State Council to stipulate contractual arrangements as a form of foreign investment. Therefore, there can be no assurance that our control over our VIEs through contractual arrangements will not be deemed as foreign investment in the future. In the event that any possible implementing regulations of the FIL, any other future laws, administrative regulations or provisions deem contractual arrangements as a way of foreign investment, or if any of our operations through contractual arrangements is classified in the "restricted" or "prohibited" industry in the future "negative list" under the FIL, our contractual arrangements may be deemed as invalid and illegal, and we may be required to unwind the variable interest entity contractual arrangements and/or dispose of any affected business, any of which may have a material adverse effect on our business operation. Also, if future laws, administrative regulations or provisions mandate further actions to be taken with respect to existing contractual arrangements, we may face substantial uncertainties as to whether we can complete such actions in a timely manner, or at all. Furthermore, under the FIL, foreign investors and foreign-invested enterprises will be subject to legal liabilities if they fail to report investment information in accordance with the FIL. In addition, the FIL provides that foreign-invested enterprises established according to the existing laws regulating foreign investment may maintain their structure and corporate governance within a five-year transition period, which means that we may be required to adjust the structure and corporate governance of certain of our PRC subsidiaries in such transition period. Failure to take timely and appropriate measures to cope with any of these or similar regulatory compliance challenges could materially and adversely affect our current corporate structure, corporate governance and business operations.

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Risks Related to Doing Business in China

Changes in China's economic, political or social conditions or government policies could have a material adverse effect on our business and operations.

        Substantially all of our assets and operations are located in China. Accordingly, our business, financial condition, results of operations and prospects may be influenced to a significant degree by political, economic and social conditions in China generally. The Chinese economy differs from the economies of most developed countries in many respects, including the level of government involvement, level of development, growth rate, control of foreign exchange and allocation of resources. Although the Chinese government has implemented measures emphasizing the utilization of market forces for economic reform, the reduction of state ownership of productive assets, and the establishment of improved corporate governance in business enterprises, a substantial portion of productive assets in China is still owned by the government. In addition, the Chinese government continues to play a significant role in regulating industry development by imposing industrial policies. The Chinese government also exercises significant control over China's economic growth through allocating resources, controlling payment of foreign currency-denominated obligations, setting monetary policy, and providing preferential treatment to particular industries or companies.

        While the Chinese economy has experienced significant growth over the past decades, growth has been uneven, both geographically and among various sectors of the economy, and the rate of growth has been slowing since 2012. Any adverse changes in economic conditions in China, in the policies of the Chinese government or in the laws and regulations in China could have a material adverse effect on the overall economic growth of China. Such developments could adversely affect our business and operating results, lead to reduction in demand for our services and adversely affect our competitive position. The Chinese government has implemented various measures to encourage economic growth and guide the allocation of resources. Some of these measures may benefit the overall Chinese economy, but may have a negative effect on us. For example, our financial condition and results of operations may be adversely affected by government control over capital investments or changes in tax regulations. In addition, in the past the Chinese government has implemented certain measures, including interest rate adjustment, to control the pace of economic growth. These measures may cause decreased economic activity in China, which may adversely affect our business and operating results.

Uncertainties with respect to the PRC legal system and changes in laws and regulations in China could adversely affect us, and any lack of requisite approvals, licenses or permits applicable to our business may have a material adverse effect on our business and results of operations.

        We conduct our business primarily through our PRC subsidiaries and consolidated variable interest entities in China. Our operations in China are governed by PRC laws and regulations. Our PRC subsidiaries are subject to laws and regulations applicable to foreign investment in China. The PRC legal system is a civil law system based on written statutes. Unlike the common law system, prior court decisions may be cited for reference but have limited precedential value. The PRC legal system is evolving rapidly, and the interpretation of many laws, regulations and rules may contain inconsistencies and enforcement of these laws, regulations and rules involves uncertainties.

        From time to time, we may have to resort to administrative and court proceedings to enforce our legal rights. Any administrative and court proceedings in China may be protracted, resulting in substantial costs and diversion of resources and management attention. Since PRC administrative and court authorities have significant discretion in interpreting and implementing statutory provisions and contractual terms, it may be more difficult to evaluate the outcome of administrative and court proceedings and the level of legal protection we enjoy than in more developed legal systems. These uncertainties may impede our ability to enforce the contracts we have entered into and could materially and adversely affect our business and results of operations.

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        Furthermore, the PRC legal system is based in part on government policies and internal rules, some of which are not published on a timely basis or at all and may have retroactive effect. As a result, we may not be aware of our violation of any of these policies and rules until sometime after the violation. Such unpredictability towards our contractual, property and procedural rights could adversely affect our business and impede our ability to continue our operations.

        In addition, the interpretation and application of existing PRC laws, regulations and policies and possible new laws, regulations or policies have created substantial uncertainties regarding the legality of existing and future foreign investments and activities of our business. We cannot assure you that we have obtained all the permits or licenses required for conducting our business in China or will be able to maintain our existing licenses or obtain new ones. If the PRC government considers that we were operating without the requisite approvals, licenses or permits or promulgates new laws and regulations that require additional approvals or licenses or imposes additional restrictions on the operation of any part of our business, it has the power, among other things, to levy fines, confiscate our income, revoke our business licenses, and require us to discontinue our relevant business or impose restrictions on the affected portion of our business. Any of these actions by the PRC government may have a material adverse effect on our business and results of operations.

You may experience difficulties in effecting service of legal process, enforcing foreign judgments or bringing actions in China against us or our senior management based on foreign laws.

        We are a company incorporated under the laws of the Cayman Islands, we conduct substantially all of our operations in China and substantially all of our assets are located in China. In addition, most of our senior executive officers reside within China for a significant portion of the time and most are PRC nationals. As a result, it may be difficult for you to effect service of process upon us or those persons inside mainland China. It may also be difficult for you to enforce in U.S. courts judgments obtained in U.S. courts based on the civil liability provisions of the U.S. federal securities laws against us and our officers and directors who reside and whose assets are located outside the United States. In addition, there is uncertainty as to whether the courts of the Cayman Islands or the PRC would recognize or enforce judgments of U.S. courts against us or such persons predicated upon the civil liability provisions of the securities laws of the United States or any state.

        The recognition and enforcement of foreign judgments are provided for under the PRC Civil Procedures Law. PRC courts may recognize and enforce foreign judgments in accordance with the requirements of the PRC Civil Procedures Law based either on treaties between China and the country where the judgment is made or on principles of reciprocity between jurisdictions. China does not have any treaties or other forms of reciprocity with the United States that provide for the reciprocal recognition and enforcement of foreign judgments. In addition, according to the PRC Civil Procedures Law, the PRC courts will not enforce a foreign judgment against us or our directors and officers if they decide that the judgment violates the basic principles of PRC laws or national sovereignty, security or public interest. As a result, it is uncertain whether and on what basis a PRC court would enforce a judgment rendered by a court in the United States.

We may rely on dividends and other distributions on equity paid by our PRC subsidiaries to fund any cash and financing requirements we may have, and any limitation on the ability of our PRC subsidiaries to make payments to us could have a material and adverse effect on our ability to conduct our business.

        We are a Cayman Islands holding company and we rely principally on dividends and other distributions on equity from our PRC subsidiaries for our cash requirements, including the funds necessary to pay dividends and other cash distributions to our shareholders for services of any debt we may incur. If any of our PRC subsidiaries incur debt on its own behalf in the future, the instruments governing the debt may restrict its ability to pay dividends or make other distributions to us. Under PRC laws and regulations, our PRC subsidiaries, each of which is a wholly foreign-owned enterprise

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may pay dividends only out of its respective accumulated profits as determined in accordance with PRC accounting standards and regulations. In addition, a wholly foreign-owned enterprise is required to set aside at least 10% of its accumulated after-tax profits each year, if any, to fund a certain statutory reserve fund, until the aggregate amount of such fund reaches 50% of its registered capital. Such reserve funds cannot be distributed to us as dividends. At its discretion, a wholly foreign-owned enterprise may allocate a portion of its after-tax profits based on PRC accounting standards to an enterprise expansion fund, or a staff welfare and bonus fund.

        Our PRC subsidiaries generate primarily all of their revenue in Renminbi, which is not freely convertible into other currencies. As result, any restriction on currency exchange may limit the ability of our PRC subsidiaries to use their Renminbi revenues to pay dividends to us.

        The PRC government may continue to strengthen its capital controls, and more restrictions and substantial vetting process may be put forward by SAFE for cross-border transactions falling under both the current account and the capital account. Any limitation on the ability of our PRC subsidiaries to pay dividends or make other kinds of payments to us could materially and adversely limit our ability to grow, make investments or acquisitions that could be beneficial to our business, pay dividends, or otherwise fund and conduct our business.

        In addition, the Enterprise Income Tax Law and its implementation rules provide that a withholding tax rate of up to 10% will be applicable to dividends payable by Chinese companies to non-PRC-resident enterprises unless otherwise exempted or reduced according to treaties or arrangements between the PRC central government and governments of other countries or regions where the non-PRC-resident enterprises are incorporated.

PRC regulation of loans to and direct investment in PRC entities by offshore holding companies and governmental control of currency conversion may delay or prevent us from using the proceeds of this offering to make loans or additional capital contributions to our PRC subsidiaries, which could materially and adversely affect our liquidity and our ability to fund and expand our business.

        We are an offshore holding company conducting our operations in China through our PRC subsidiaries and VIEs. We may make loans to our PRC subsidiaries and VIEs subject to the approval or registration from governmental authorities and limitation of amount, or we may make additional capital contributions to our wholly foreign-owned subsidiaries in China. Any loans to our wholly foreign-owned subsidiaries in China, which are treated as foreign-invested enterprises under PRC law, are subject to foreign exchange loan registrations. In addition, an FIE shall use its capital pursuant to the principle of authenticity and self-use within its business scope. The capital of an FIE shall not be used for the following purposes: (i) directly or indirectly used for payment beyond the business scope of the enterprises or the payment prohibited by relevant laws and regulations; (ii) directly or indirectly used for investment in securities or investments other than banks' principal-secured products unless otherwise provided by relevant laws and regulations; (iii) the granting of loans to non-affiliated enterprises, except where it is expressly permitted in the business license; and (iv) paying the expenses related to the purchase of real estate that is not for self-use (except for the foreign-invested real estate enterprises).

        In light of the various requirements imposed by PRC regulations on loans to and direct investment in PRC entities by offshore holding companies, we cannot assure you that we will be able to complete the necessary government registrations or obtain the necessary government approvals on a timely basis, if at all, with respect to future loans by us to our PRC subsidiaries or VIEs or with respect to future capital contributions by us to our PRC subsidiaries. If we fail to complete such registrations or obtain such approvals, our ability to use the proceeds from this offering and to capitalize or otherwise fund our PRC operations may be negatively affected, which could materially and adversely affect our liquidity and our ability to fund and expand our business.

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Fluctuations in exchange rates could have a material and adverse effect on our results of operations and the value of your investment.

        The value of the Renminbi against the U.S. dollar and other currencies may fluctuate and is affected by, among other things, changes in political and economic conditions in China and by China's foreign exchange policies. On July 21, 2005, the PRC government changed its decade-old policy of pegging the value of the Renminbi to the U.S. dollar, and the Renminbi appreciated more than 20% against the U.S. dollar over the following three years. Between July 2008 and June 2010, this appreciation halted and the exchange rate between the Renminbi and the U.S. dollar remained within a narrow band. Since June 2010, the RMB has fluctuated against the U.S. dollar, at times significantly and unpredictably. While appreciating approximately by 7% against the U.S. dollar in 2017, the RMB in 2018 depreciated approximately by 5% against the U.S. dollar. Since October 1, 2016, the RMB has joined the International Monetary Fund (IMF)'s basket of currencies that make up the Special Drawing Right (SDR), along with the U.S. dollar, the Euro, the Japanese yen and the British pound. With the development of the foreign exchange market and progress towards interest rate liberalization and Renminbi internationalization, the PRC government may in the future announce further changes to the exchange rate system and there is no guarantee that the RMB will not appreciate or depreciate significantly in value against the U.S. dollar in the future. It is difficult to predict how market forces or PRC or U.S. government policy may impact the exchange rate between the RMB and the U.S. dollar in the future.

        Significant revaluation of the Renminbi may have a material and adverse effect on your investment. For example, to the extent that we need to convert U.S. dollars we receive from this offering into Renminbi for our operations, appreciation of the Renminbi against the U.S. dollar would have an adverse effect on the Renminbi amount we would receive from the conversion. Conversely, if we decide to convert our Renminbi into U.S. dollars for the purpose of making payments for dividends on our ordinary shares or ADSs or for other business purposes, appreciation of the U.S. dollar against the Renminbi would have a negative effect on the U.S. dollar amount available to us.

        Very limited hedging options are available in China to reduce our exposure to exchange rate fluctuations. To date, we have not entered into any hedging transactions in an effort to reduce our exposure to foreign currency exchange risk. While we may decide to enter into hedging transactions in the future, the availability and effectiveness of these hedges may be limited and we may not be able to adequately hedge our exposure or at all. In addition, our currency exchange losses may be magnified by PRC exchange control regulations that restrict our ability to convert Renminbi into a foreign currency.

Governmental control of currency conversion may limit our ability to utilize our net revenues effectively and affect the value of your investment.

        The PRC government imposes controls on the convertibility of the Renminbi into foreign currencies and, in certain cases, the remittance of currency out of China. We receive substantially all of our revenues in Renminbi. Under our current corporate structure, our Cayman Islands holding company primarily relies on dividend payments from our PRC subsidiaries to fund any cash and financing requirements we may have. Under existing PRC foreign exchange regulations, payments of current account items, including profit distributions, interest payments and trade and service-related foreign exchange transactions, can be made in foreign currencies without prior approval of SAFE by complying with certain procedural requirements. Specifically, under the existing exchange restrictions, without prior approval of SAFE, cash generated from the operations of our PRC subsidiaries in China may be used to pay dividends to our company. However, approval from or registration with appropriate government authorities is required where Renminbi is to be converted into a foreign currency and remitted out of China to pay capital expenses such as the repayment of loans denominated in foreign currencies. As a result, we need to obtain SAFE approval to use cash generated from the operations of our PRC subsidiaries and VIEs to pay off their respective debt in a currency other than Renminbi

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owed to entities outside China, or to make other capital expenditure payments outside China in a currency other than Renminbi. The PRC government may at its discretion restrict access to foreign currencies for current account transactions in the future. If the foreign exchange control system prevents us from obtaining sufficient foreign currencies to satisfy our foreign currency demands, we may not be able to pay dividends in foreign currencies to our shareholders, including holders of our ADSs.

Certain PRC regulations may make it more difficult for us to pursue growth through acquisitions.

        Among other things, the Regulations on Mergers and Acquisitions of Domestic Enterprises by Foreign Investors, or the M&A Rules, adopted by six PRC regulatory agencies in 2006 and amended in 2009, established additional procedures and requirements that could make merger and acquisition activities by foreign investors more time-consuming and complex. Such regulation requires, among other things, that the MOFCOM be notified in advance of any change-of-control transaction in which a foreign investor acquires control of a PRC domestic enterprise or a foreign company with substantial PRC operations, if certain thresholds under the Provisions on Thresholds for Prior Notification of Concentrations of Undertakings, issued by the State Council in 2008, were triggered. Moreover, the Anti-Monopoly Law promulgated by the Standing Committee of the NPC which became effective in 2008 requires that transactions which are deemed concentrations and involve parties with specified turnover thresholds must be cleared by the MOFCOM before they can be completed. In addition, PRC national security review rules which became effective in September 2011 require acquisitions by foreign investors of PRC companies engaged in military related or certain other industries that are crucial to national security be subject to security review before consummation of any such acquisition. We may pursue potential strategic acquisitions that are complementary to our business and operations. Complying with the requirements of these regulations to complete such transactions could be time-consuming, and any required approval processes, including obtaining approval or clearance from the MOFCOM, may delay or inhibit our ability to complete such transactions, which could affect our ability to expand our business or maintain our market share.

PRC regulations relating to the establishment of offshore special purpose companies by PRC residents may subject our PRC resident beneficial owners or our PRC subsidiaries to liability or penalties, limit our ability to inject capital into our PRC subsidiaries, limit our PRC subsidiaries' ability to increase their registered capital or distribute profits to us, or may otherwise adversely affect us.

        In July 2014, SAFE promulgated the Circular on Relevant Issues Concerning Foreign Exchange Control on Domestic Residents' Offshore Investment and Financing and Roundtrip Investment Through Special Purpose Vehicles, or SAFE Circular 37, to replace the Notice on Relevant Issues Concerning Foreign Exchange Administration for Domestic Residents' Financing and Roundtrip Investment Through Offshore Special Purpose Vehicles, or SAFE Circular 75, which ceased to be effective upon the promulgation of SAFE Circular 37. SAFE Circular 37 requires PRC residents (including PRC individuals and PRC corporate entities) to register with SAFE or its local branches in connection with their direct or indirect offshore investment activities. SAFE Circular 37 is applicable to our shareholders who are PRC residents and may be applicable to any offshore acquisitions that we make in the future.

        Under SAFE Circular 37, PRC residents who make, or have prior to the implementation of SAFE Circular 37 made, direct or indirect investments in offshore special purpose vehicles, or SPVs, will be required to register such investments with SAFE or its local branches. In addition, any PRC resident who is a direct or indirect shareholder of an SPV, is required to update its filed registration with the local branch of SAFE with respect to that SPV, to reflect any material change. Moreover, any subsidiary of such SPV in China is required to urge the PRC resident shareholders to update their registration with the local branch of SAFE. If any PRC shareholder of such SPV fails to make the

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required registration or to update the previously filed registration, the subsidiary of such SPV in China may be prohibited from distributing its profits or the proceeds from any capital reduction, share transfer or liquidation to the SPV, and the SPV may also be prohibited from making additional capital contributions into its subsidiary in China. On February 13, 2015, SAFE promulgated a Notice on Further Simplifying and Improving Foreign Exchange Administration Policy on Direct Investment, or SAFE Notice 13, which became effective on June 1, 2015. Under SAFE Notice 13, applications for foreign exchange registration of inbound foreign direct investments and outbound overseas direct investments, including those required under SAFE Circular 37, will be filed with qualified banks instead of SAFE. The qualified banks will directly examine the applications and accept registrations under the supervision of SAFE.

        We have requested PRC residents who we know hold direct or indirect interest in our company to make the necessary applications, filings and registrations as required under SAFE Circular 37 and our PRC resident shareholders, namely Wang Huang, Yunfen Lu, Meihui Fan, Bin Fan, Yi Zhang and Xiaojun Zhang, have completed all necessary registrations with the local SAFE branch or qualified banks as required by SAFE Circular 37. However, we may not be informed of the identities of all the PRC residents holding direct or indirect interest in our company, and we cannot provide any assurance that these PRC residents will comply with our request to make or obtain any applicable registrations or comply with other requirements under SAFE Circular 37. The failure or inability of our PRC resident shareholders to comply with the registration procedures set forth in these regulations may subject us to fines and legal sanctions, restrict our cross-border investment activities, limit the ability of our wholly foreign-owned subsidiaries in China to distribute dividends and the proceeds from any reduction in capital, share transfer or liquidation to us, and we may also be prohibited from injecting additional capital into these subsidiaries. Moreover, failure to comply with the various foreign exchange registration requirements described above could result in liability under PRC law for circumventing applicable foreign exchange restrictions. As a result, our business operations and our ability to distribute profits to you could be materially and adversely affected.

Any failure to comply with PRC regulations regarding the registration requirements for employee stock incentive plans may subject the PRC plan participants or us to fines and other legal or administrative sanctions.

        In February 2012, SAFE promulgated the Notices on Issues Concerning the Foreign Exchange Administration for Domestic Individuals Participating in Stock Incentive Plan of Overseas Publicly-Listed Company, replacing earlier rules promulgated in 2007. Pursuant to these rules, PRC citizens and non-PRC citizens who reside in China for a continuous period of not less than one year who participate in any stock incentive plan of an overseas publicly listed company, subject to a few exceptions, are required to register with SAFE through a domestic qualified agent, which could be the PRC subsidiaries of such overseas-listed company, and complete certain other procedures. In addition, an overseas-entrusted institution must be retained to handle matters in connection with the exercise or sale of stock options and the purchase or sale of shares and interests. We and our executive officers and other employees who are PRC citizens or who reside in the PRC for a continuous period of not less than one year and who have been granted options are subject to these regulations as our company has become an overseas-listed company. Failure to complete SAFE registrations may subject them to fines of up to RMB300,000 for entities and up to RMB50,000 for individuals, and legal sanctions and may also limit our ability to contribute additional capital into our PRC subsidiaries and limit our PRC subsidiaries' ability to distribute dividends to us. We also face regulatory uncertainties that could restrict our ability to adopt additional incentive plans for our directors, executive officers and employees under PRC law.

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If we are classified as a PRC resident enterprise for PRC income tax purposes, such classification could result in unfavorable tax consequences to us and our non-PRC shareholders or ADS holders.

        Under the PRC Enterprise Income Tax Law and its implementation rules, an enterprise established outside of the PRC with "de facto management body" within the PRC is considered a "resident enterprise" and will be subject to the enterprise income tax on its global income at the rate of 25%. The implementation rules define the term "de facto management body" as the body that exercises full and substantial control and overall management over the business, productions, personnel, accounts and properties of an enterprise. In 2009, the State Administration of Taxation, or SAT, issued a circular, known as SAT Circular 82, which provides certain specific criteria for determining whether the "de facto management body" of a PRC-controlled enterprise that is incorporated offshore is located in China. Although this circular only applies to offshore enterprises controlled by PRC enterprises or PRC enterprise groups, not those controlled by PRC individuals or foreigners, the criteria set forth in the circular may reflect the SAT's general position on how the "de facto management body" text should be applied in determining the tax resident status of all offshore enterprises. According to SAT Circular 82, an offshore incorporated enterprise controlled by a PRC enterprise or a PRC enterprise group will be regarded as a PRC tax resident by virtue of having its "de facto management body" in China and will be subject to PRC enterprise income tax on its global income only if all of the following conditions are met: (i) the primary location of the day-to-day operational management is in the PRC; (ii) decisions relating to the enterprise's financial and human resource matters are made or are subject to approval by organizations or personnel in the PRC; (iii) the enterprise's primary assets, accounting books and records, company seals, and board and shareholder resolutions, are located or maintained in the PRC; and (iv) at least 50% of voting board members or senior executives habitually reside in the PRC.

        We believe that Huami Corporation is not a PRC resident enterprise for PRC tax purposes. However, the tax resident status of an enterprise is subject to determination by the PRC tax authorities and uncertainties remain with respect to the interpretation of the term "de facto management body." If the PRC tax authorities determine that Huami Corporation is a PRC resident enterprise for enterprise income tax purposes, we may be required to withhold a 10% withholding tax from dividends we pay to our shareholders that are non-resident enterprises, including the holders of our ADSs. In addition, non-resident enterprise shareholders (including our ADS holders) may be subject to PRC tax on gains realized on the sale or other disposition of ADSs or ordinary shares, if such income is treated as sourced from within the PRC. Furthermore, if we are deemed a PRC resident enterprise, dividends payable to our non-PRC individual shareholders (including our ADS holders) and any gain realized on the transfer of ADSs or ordinary shares by such shareholders may be subject to PRC tax at a rate of 20% unless a reduced rate is available under an applicable tax treaty. It is unclear whether non-PRC shareholders of our company would be able to claim the benefits of any tax treaties between their country of tax residence and the PRC in the event that we are treated as a PRC resident enterprise. Any such tax may reduce the returns on your investment in the ADSs or ordinary shares.

We face uncertainty with respect to indirect transfers of equity interests in PRC resident enterprises by their non-PRC holding companies.

        On December 10, 2009, SAT issued the Notice on Strengthening Administration of Enterprise Income Tax for Share Transfers by Non-PRC Resident Enterprises, or SAT Circular 698, with retroactive effect from January 1, 2008, to December 1, 2017. Pursuant to the SAT Circular 698, where a non-resident enterprise transfers the equity interests of a PRC resident enterprise indirectly by disposition of the equity interests of an overseas holding company, or an Indirect Transfer, and such overseas holding company is located in a tax jurisdiction that: (i) has an effective tax rate less than 12.5% or (ii) does not tax foreign income of its residents, the non-resident enterprise, being the transferor, shall report to the competent tax authority of the PRC resident enterprise this Indirect Transfer.

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        On February 3, 2015, the SAT issued the Public Notice Regarding Certain Corporate Income Tax Matters on Indirect Transfer of Properties by Non-Tax Resident Enterprises, or SAT Public Notice 7. SAT Public Notice 7 extends its tax jurisdiction to not only Indirect Transfers set forth under SAT Circular 698 but also transactions involving transfer of other taxable assets through offshore transfer of a foreign intermediate holding company. In addition, SAT Public Notice 7 provides clearer criteria than SAT Circular 698 for assessment of reasonable commercial purposes and has introduced safe harbors for internal group restructurings and the purchase and sale of equity through a public securities market. SAT Public Notice 7 also brings challenges to both foreign transferor and transferee (or other person who is obligated to pay for the transfer) of taxable assets. Where a non-resident enterprise transfers taxable assets indirectly by disposing of the equity interests of an overseas holding company, which is an Indirect Transfer, the non-resident enterprise as either transferor or transferee, or the PRC entity that directly owns the taxable assets, may report such Indirect Transfer to the relevant tax authority. Using a "substance over form" principle, the PRC tax authority may disregard the existence of the overseas holding company if it lacks a reasonable commercial purpose and was established for the purpose of reducing, avoiding or deferring PRC tax. As a result, gains derived from such Indirect Transfer may be subject to PRC enterprise income tax, and the transferee or other person who is obligated to pay for the transfer is obligated to withhold the applicable taxes, currently at a rate of 10% for the transfer of equity interests in a PRC resident enterprise. Both the transferor and the transferee may be subject to penalties under PRC tax laws if the transferee fails to withhold the taxes and the transferor fails to pay the taxes.

        On October 17, 2017, the SAT released Public Notice Regarding Issues Concerning the Withholding of Non-resident Enterprise Income Tax at Source, or SAT Public Notice 37, effect from December 1, 2017. SAT Public Notice 37 replaced a series of important circulars, including but not limited to SAT Circular 698, and revised the rules governing the administration of withholding tax on China-source income derived by the non-resident enterprise. SAT Public Notice 37 provided certain key changes to the current withholding regime including, such as (i) the withholding obligation for non-resident enterprise deriving dividend arises on the day the payment is actually made rather than on the day of the resolution to declare the dividends; (ii) the provision that non-resident enterprise shall self-report tax within seven days if their withholding agents fail to withhold is removed, etc.

        We face uncertainties as to the reporting and other implications of certain past and future transactions where PRC taxable assets are involved, such as offshore restructuring, sale of the shares in our offshore subsidiaries and investments. Our company may be subject to withholding obligations if our company is transferee in such transactions, under SAT Public Notice 37 and SAT Public Notice 7. For transfer of shares in our company by investors who are non-PRC resident enterprises, our PRC subsidiaries may be required to expend valuable resources to comply with SAT Public Notice 37 and SAT Public Notice 7 or to request the relevant transferors from whom we purchase taxable assets to comply with these circulars, or to establish that our company should not be taxed under these circulars, which may have an adverse effect on our financial condition and results of operations.

The approval of the China Securities Regulatory Commission may be required in connection with this offering, and, if required, we cannot predict whether we will be able to obtain such approval.

        The Regulations on Mergers and Acquisitions of Domestic Companies by Foreign Investors, or the M&A Rules, adopted by six PRC regulatory agencies requires an overseas special purpose vehicle formed for listing purposes through acquisitions of PRC domestic companies and controlled by PRC companies or individuals to obtain the approval of the CSRC prior to the listing and trading of such special purpose vehicle's securities on an overseas stock exchange. However, the application of the M&A Rules remains unclear. Currently, there is no consensus among leading PRC law firms regarding the scope and applicability of the CSRC approval requirement.

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        Our PRC counsel, Zhong Lun Law Firm, has advised us based on their understanding of the current PRC laws, rules and regulations that the CSRC's approval is not required for the listing and trading of our ADSs on the New York Stock Exchange in the context of this offering, given that: (i) our PRC subsidiaries were incorporated as wholly foreign-owned enterprises by means of direct investment rather than by merger or acquisition of equity interest or assets of a PRC domestic company owned by PRC companies or individuals as defined under the M&A Rules that are our beneficial owners; and (ii) no provision in the M&A Rules clearly classifies contractual arrangements as a type of transaction subject to the M&A Rules.

        However, our PRC counsel has further advised us that there remains some uncertainty as to how the M&A Rules will be interpreted or implemented in the context of an overseas offering and its opinions summarized above are subject to any new laws, rules and regulations or detailed implementations and interpretations in any form relating to the M&A Rules. We cannot assure you that relevant PRC government agencies, including the CSRC, would reach the same conclusion as we do. If it is determined that CSRC approval is required for this offering, we may face sanctions by the CSRC or other PRC regulatory agencies for failure to seek CSRC approval for this offering. These sanctions may include fines and penalties on our operations in the PRC, limitations on our operating privileges in the PRC, delays in or restrictions on the repatriation of the proceeds from this offering into the PRC, restrictions on or prohibition of the payments or remittance of dividends by our China subsidiary, or other actions that could have a material and adverse effect on our business, financial condition, results of operations, reputation and prospects, as well as the trading price of our ADSs. The CSRC or other PRC regulatory agencies may also take actions requiring us, or making it advisable for us, to halt this offering before the settlement and delivery of the ADSs that we are offering. Consequently, if you engage in market trading or other activities in anticipation of and prior to the settlement and delivery of the ADSs we are offering, you would be doing so at the risk that the settlement and delivery may not occur.

The audit report included in our annual report on Form 20-F for the year ended December 31, 2018 and incorporated by reference in this prospectus is prepared by an auditor who is not inspected by the Public Company Accounting Oversight Board and, as such, you are deprived of the benefits of such inspection.

        Auditors of companies whose shares are registered with the SEC and traded publicly in the United States, including our independent registered public accounting firm, must be registered with the U.S. Public Company Accounting Oversight Board, or the PCAOB, and are required by the laws of the United States to undergo regular inspections by the PCAOB to assess their compliance with the laws of the United States and professional standards applicable to auditors. Our independent registered public accounting firm is located in, and organized under the laws of, the PRC, which is a jurisdiction where the PCAOB, notwithstanding the requirements of U.S. law, is currently unable to conduct inspections without the approval of the Chinese authorities. In May 2013, the PCAOB announced that it had entered into a Memorandum of Understanding on Enforcement Cooperation with the China Securities Regulatory Commission, or the CSRC, and the PRC Ministry of Finance, which establishes a cooperative framework between the parties for the production and exchange of audit documents relevant to investigations undertaken by the PCAOB, or the CSRC or the PRC Ministry of Finance in the United States and the PRC, respectively. The PCAOB continues to be in discussions with the CSRC and the PRC Ministry of Finance to permit joint inspections in the PRC of audit firms that are registered with the PCAOB and audit Chinese companies that trade on U.S. exchanges. On December 7, 2018, the SEC and the PCAOB issued a joint statement highlighting continued challenges faced by the U.S. regulators in their oversight of financial statement audits of U.S.-listed companies with significant operations in China. However, it remains unclear what further actions the SEC and PCAOB will take to address the problem.

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        This lack of PCAOB inspections in China prevents the PCAOB from fully evaluating audits and quality control procedures of our independent registered public accounting firm. As a result, we and investors may be deprived of the benefits of such PCAOB inspections. The inability of the PCAOB to conduct inspections of auditors in China makes it more difficult to evaluate the effectiveness of our independent registered public accounting firm's audit procedures or quality control procedures as compared to auditors outside of China that are subject to PCAOB inspections, which could cause investors and potential investors of our ADSs to lose confidence in our audit procedures and reported financial information and the quality of our financial statements.

Proceedings instituted by the SEC against Chinese affiliates of the "big four" accounting firms, including our independent registered public accounting firm, could result in financial statements being determined to not be in compliance with the requirements of the Exchange Act.

        Starting in 2011 the Chinese affiliates of the "big four" accounting firms, including our independent registered public accounting firm, were affected by a conflict between U.S. and Chinese law. Specifically, for certain U.S.-listed companies operating and audited in mainland China, the SEC and the PCAOB sought to obtain from the Chinese firms access to their audit work papers and related documents. The firms were, however, advised and directed that under Chinese law, they could not respond directly to the U.S. regulators on those requests, and that requests by foreign regulators for access to such papers in China had to be channeled through the CSRC.

        In late 2012, this impasse led the SEC to commence administrative proceedings under Rule 102(e) of its Rules of Practice and also under the Sarbanes-Oxley Act of 2002 against these Chinese accounting firms, including our independent registered public accounting firm. A first instance trial of the proceedings in July 2013 in the SEC's internal administrative court resulted in an adverse judgment against the firms. The administrative law judge proposed penalties on the firms including a temporary suspension of their right to practice before the SEC, although that proposed penalty did not take effect pending review by the Commissioners of the SEC. On February 6, 2015, before a review by the Commissioner had taken place, the firms reached a settlement with the SEC. Under the settlement, the SEC accepts that future requests by the SEC for the production of documents will normally be made to the CSRC. The firms will receive matching Section 106 requests, and are required to abide by a detailed set of procedures with respect to such requests, which in substance require them to facilitate production via the CSRC. If they fail to meet the specified criteria during a period of four years starting from the settlement date, the SEC retains authority to impose a variety of additional remedial measures on the firms depending on the nature of the failure. Additional remedies for any future noncompliance could include, as appropriate, an automatic six-month bar on a single firm's performance of certain audit work, commencement of additional proceedings against a firm, or in extreme cases the resumption of the current proceeding against all four firms. In addition, pursuant to the terms of the settlement, the underlying proceeding against these Chinese accounting firms had been deemed dismissed with prejudice on February 6, 2019. We cannot predict if the SEC will further challenge these Chinese accounting firms' compliance with U.S. law in connection with U.S. regulatory requests for audit work papers, or if such challenge will result in the SEC imposing penalties, such as suspensions, on these Chinese accounting firms. If the SEC pursues further challenges against these Chinese accounting firms, we may not be able to timely file future financial statements in compliance with the requirements of the Exchange Act.

        In the event that the SEC restarts the administrative proceedings, depending upon the final outcome, listed companies in the United States with major PRC operations may find it difficult or impossible to retain auditors in respect of their operations in the PRC, which could result in financial statements being determined to not be in compliance with the requirements of the Exchange Act, including possible delisting. Moreover, any negative news about any such future proceedings against

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these audit firms may cause investor uncertainty regarding China-based, U.S.-listed companies and the market price of our ADSs may be adversely affected.

        If our independent registered public accounting firm was denied, even temporarily, the ability to practice before the SEC and we were unable to timely find another registered public accounting firm to audit and issue an opinion on our financial statements, our financial statements could be determined not to be in compliance with the requirements of the Exchange Act. Such a determination could ultimately lead to the delisting of our ADSs from the New York Stock Exchange or deregistration from the SEC, or both, which would substantially reduce or effectively terminate the trading of our ADSs in the United States.

Risks Related to The ADSs and This Offering

The trading price of our ADSs has fluctuated and is likely to be volatile, which could result in substantial losses to investors.

        Since we first listed our ADSs on the New York Stock Exchange, or NYSE, on February 8, 2018, the trading prices of our ADSs have been and may continue to be subject to wide fluctuations. In 2018, the trading prices of our ADSs on NYSE have ranged from US$8.43 to US$15.09 per ADS, and the last reported trading price on April 24, 2019 was US$11.04 per ADS.

        The trading price of our ADSs is likely to be volatile and could fluctuate widely due to factors beyond our control. This may happen because of broad market and industry factors, including the performance and fluctuation of the market prices of other companies with business operations located mainly in China that have listed their securities in the United States. In addition to market and industry factors, the price and trading volume for our ADSs may be highly volatile for factors specific to our own operations, including the following:

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regulatory developments affecting us or our industry, customers or suppliers;



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announcements of studies and reports relating to the quality of our product and service offerings or those of our competitors;



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changes in the economic performance or market valuations of other smart wearables companies;



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actual or anticipated fluctuations in our quarterly results of operations and changes or revisions of our expected results;



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changes in financial estimates by securities research analysts;



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conditions in the online retail market;



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announcements by us or our competitors of new product and service offerings, acquisitions, strategic relationships, joint ventures, capital raisings or capital commitments;



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additions to or departures of our senior management;



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fluctuations of exchange rates between the RMB and the U.S. dollar;



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release or expiry of lock-up or other transfer restrictions on our outstanding shares or ADSs;



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sales or perceived potential sales of additional ordinary shares or ADSs;



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any actual or alleged illegal acts of our shareholders or management; and



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proceedings instituted by the SEC against PRC-based accounting firms, including our independent registered public accounting firm.

        Any of these factors may result in large and sudden changes in the volume and price at which our ADSs will trade.

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        In the past, shareholders of public companies have often brought securities class action suits against those companies following periods of instability in the market price of their securities. If we were involved in a class action suit, it could divert a significant amount of our management's attention and other resources from our business and operations and require us to incur significant expenses to defend the suit, which could harm our results of operations. Any such class action suit, whether or not successful, could harm our reputation and restrict our ability to raise capital in the future. In addition, if a claim is successfully made against us, we may be required to pay significant damages, which could have a material adverse effect on our financial condition and results of operations.

If securities or industry analysts do not publish research or reports about our business, or if they adversely change their recommendations regarding our ADSs, the market price for our ADSs and trading volume could decline.

        The trading market for our ADSs will be influenced by research or reports that industry or securities analysts publish about our business. If one or more analysts who cover us downgrade our ADSs, the market price for our ADSs would likely decline. If one or more of these analysts cease to cover us or fail to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause the market price or trading volume for our ADSs to decline.

The sale or availability for sale of substantial amounts of our ADSs could adversely affect their market price.

        Sales of substantial amounts of our ADSs in the public market after the completion of this offering, or the perception that these sales could occur, could adversely affect the market price of our ADSs and could materially impair our ability to raise capital through equity offerings in the future. The ADSs sold in this offering will be freely tradable without restriction or further registration under the Securities Act, and shares held by our existing shareholders may also be sold in the public market in the future subject to the restrictions in Rule 144 and Rule 701 under the Securities Act and the applicable lock-up agreements. There will be 22,062,773 ADSs (representing 88,251,092 Class A ordinary shares) outstanding immediately after this offering, or 23,253,273 ADSs (representing 93,013,092 Class A ordinary shares) if the underwriters exercise their over-allotment option in full. In connection with this offering, we, our directors and executive officers, and the selling shareholders have agreed not to sell any ordinary shares or ADSs for 90 days after the date of this prospectus without the prior written consent of the underwriters, subject to certain exceptions. However, the underwriters may release these securities from these restrictions at any time, subject to applicable regulations of the Financial Industry Regulatory Authority, Inc. We cannot predict what effect, if any, market sales of securities held by our significant shareholders or any other shareholder or the availability of these securities for future sale will have on the market price of our ADSs. See "Underwriting" and "Shares Eligible for Future Sale" for a more detailed description of the restrictions on selling our securities after this offering.

Because we do not expect to pay dividends in the foreseeable future after this offering, you must rely on a price appreciation of our ADSs for return on your investment.

        We currently intend to retain most, if not all, of our available funds and any future earnings after this offering to fund the development and growth of our business. As a result, we do not expect to pay any cash dividends in the foreseeable future. Therefore, you should not rely on an investment in our ADSs as a source for any future dividend income.

        Our board of directors has complete discretion as to whether to distribute dividends, subject to certain requirements of Cayman Islands law. In addition, our shareholders may by ordinary resolution declare a dividend, but no dividend may exceed the amount recommended by our directors. Under Cayman Islands law, a Cayman Islands company may pay a dividend out of either profit or share premium account, provided that in no circumstances may a dividend be paid if this would result in the

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company being unable to pay its debts as they fall due in the ordinary course of business. Even if our board of directors decides to declare and pay dividends, the timing, amount and form of future dividends, if any, will depend on our future results of operations and cash flow, our capital requirements and surplus, the amount of distributions, if any, received by us from our subsidiaries, our financial condition, contractual restrictions and other factors deemed relevant by our board of directors. Accordingly, the return on your investment in our ADSs will likely depend entirely upon any future price appreciation of our ADSs. There is no guarantee that our ADSs will appreciate in value after this offering or even maintain the price at which you purchased the ADSs. You may not realize a return on your investment in our ADSs and you may even lose your entire investment in our ADSs.

Our dual-class voting structure will limit your ability to influence corporate matters and could discourage others from pursuing any change of control transactions that holders of our Class A ordinary shares and ADSs may view as beneficial.

        We have a dual class ordinary share structure. Our ordinary shares are divided into Class A ordinary shares and Class B ordinary shares. Holders of Class A ordinary shares are entitled to one vote per share, while holders of Class B ordinary shares are entitled to ten votes per share. Each Class B ordinary share is convertible into one Class A ordinary share at any time by the holder thereof, while Class A ordinary shares are not convertible into Class B ordinary shares under any circumstances. Upon any transfer of Class B ordinary shares by a holder thereof to any person or entity, such Class B ordinary shares shall be automatically and immediately converted into the equal number of Class A ordinary shares.

        Upon the completion of this offering, holders of our Class B ordinary shares will hold an aggregate of 156,060,279 Class B ordinary shares, which will represent 63.7% of the total outstanding shares and 94.6% of total voting power of our outstanding shares. Therefore, our Class B ordinary shareholders have decisive influence over matters requiring shareholders' approval, including election of directors and significant corporate transactions, such as a merger or sale of our company or our assets. This concentrated control will limit your ability to influence corporate matters and could discourage others from pursuing any potential merger, takeover or other change of control transactions that holders of Class A ordinary shares and ADSs may view as beneficial.

The dual class structure of our ordinary shares may adversely affect the trading market for our ADSs.

        In 2017, S&P Dow Jones and FTSE Russell announced changes to their eligibility criteria for inclusion of shares of public companies on certain indices, including the S&P 500, to exclude companies with multiple classes of shares and companies whose public shareholders hold no more than 5% of total voting power from being added to such indices. In addition, several shareholder advisory firms have announced their opposition to the use of multiple class structures. As a result, the dual class structure of our ordinary shares may prevent the inclusion of our ADSs, each representing four of our Class A ordinary shares, in such indices and may cause shareholder advisory firms to publish negative commentary about our corporate governance practices or otherwise seek to cause us to change our capital structure. Any such exclusion from indices could result in a less active trading market for our ADSs. Any actions or publications by shareholder advisory firms critical of our corporate governance practices or capital structure could also adversely affect the value of our ADSs.

We have not determined a specific use for a portion of the net proceeds from this offering and we may use these proceeds in ways with which you may not agree.

        We have not determined a specific use for a portion of the net proceeds of this offering, and our management will have considerable discretion in deciding how to apply these proceeds. You will not have the opportunity to assess whether the proceeds are being used appropriately before you make your investment decision. You must rely on the judgment of our management regarding the application of the net proceeds of this offering. We cannot assure you that the net proceeds will be used in a manner that would improve our results of operations or increase our ADS price, nor that these net proceeds will be placed only in investments that generate income or appreciate in value.

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Our Memorandum and Articles contain anti-takeover provisions that could have a material adverse effect on the rights of holders of our ordinary shares and ADSs.

        Our Memorandum and Articles contain provisions to limit the ability of others to acquire control of our company or cause us to engage in change-of-control transactions. These provisions could have the effect of depriving our shareholders of an opportunity to sell their shares at a premium over prevailing market prices by discouraging third parties from seeking to obtain control of our company in a tender offer or similar transaction. Our board of directors has the authority, without further action by our shareholders, to issue preferred shares in one or more series and to fix their designations, powers, preferences, privileges, and relative participating, optional or special rights and the qualifications, limitations or restrictions, including dividend rights, conversion rights, voting rights, terms of redemption and liquidation preferences, any or all of which may be greater than the rights associated with our ordinary shares, in the form of ADS or otherwise. Preferred shares could be issued quickly with terms calculated to delay or prevent a change in control of our company or make removal of management more difficult. If our board of directors decides to issue preferred shares, the price of our ADSs may fall and the voting and other rights of the holders of our ordinary shares and ADSs may be materially and adversely affected.

Our directors and officers collectively control a significant amount of our shares, and their interests may not align with the interests of our other shareholders.

        Upon the completion of this offering, our officers and directors will collectively hold 52.0% of our total voting power. This significant concentration of share ownership and voting power may adversely affect or reduce the trading price of our ADSs because investors often perceive a disadvantage in owning shares in a company with one or several controlling shareholders. Furthermore, our directors and officers, as a group, have the ability to significantly influence or control the outcome of all matters requiring shareholders' approvals, including electing directors and approving mergers or other business combination transactions. These actions may be taken even if they are opposed by our other shareholders. This concentration of share ownership and voting power may also discourage, delay or prevent a change in control of our company, which could deprive our shareholders of an opportunity to receive a premium for their shares as part of a sale of our company.

You may face difficulties in protecting your interests, and your ability to protect your rights through U.S. courts may be limited, because we are incorporated under Cayman Islands law.

        We are an exempted company incorporated under the laws of the Cayman Islands. Our corporate affairs are governed by our Memorandum and Articles, the Companies Law (2018 Revision) of the Cayman Islands and the common law of the Cayman Islands. The rights of shareholders to take action against our directors, actions by our minority shareholders and the fiduciary duties of our directors to us under Cayman Islands law are to a large extent governed by the common law of the Cayman Islands. The common law of the Cayman Islands is derived in part from comparatively limited judicial precedent in the Cayman Islands as well as from the common law of England, the decisions of whose courts are of persuasive authority, but are not binding, on a court in the Cayman Islands. The rights of our shareholders and the fiduciary duties of our directors under Cayman Islands law are not as clearly established as they would be under statutes or judicial precedent in some jurisdictions in the United States. In particular, the Cayman Islands has a less developed body of securities laws than the United States. Some U.S. states, such as Delaware, have more fully developed and judicially interpreted bodies of corporate law than the Cayman Islands. In addition, Cayman Islands companies may not have standing to initiate a shareholder derivative action in a federal court of the United States.

        Shareholders of Cayman Islands exempted companies like us have no general rights under Cayman Islands law to inspect corporate records or to obtain copies of lists of shareholders of these companies. Our directors have discretion under our Memorandum and Articles to determine whether or not, and

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under what conditions, our corporate records may be inspected by our shareholders, but are not obliged to make them available to our shareholders. This may make it more difficult for you to obtain the information needed to establish any facts necessary for a shareholder motion or to solicit proxies from other shareholders in connection with a proxy contest.

        As a result of all of the above, our public shareholders may have more difficulty in protecting their interests in the face of actions taken by management, members of the board of directors or controlling shareholders than they would as public shareholders of a company incorporated in the United States. For a discussion of significant differences between the provisions of the Companies Law of the Cayman Islands and the laws applicable to companies incorporated in the United States and their shareholders, see "Description of Share Capital—Differences in Corporate Law."

Certain judgments obtained against us by our shareholders may not be enforceable.

        We are a Cayman Islands company and substantially all of our assets are located outside of the United States. Substantially all of our current operations are conducted in China. In addition, most of our current directors and officers are nationals and residents of countries other than the United States. Substantially all of the assets of these persons are located outside the United States. As a result, it may be difficult or impossible for you to bring an action against us or against these individuals in the United States in the event that you believe that your rights have been infringed under the U.S. federal securities laws or otherwise. Even if you are successful in bringing an action of this kind, the laws of the Cayman Islands and of China may render you unable to enforce a judgment against our assets or the assets of our directors and officers. For more information regarding the relevant laws of the Cayman Islands and China, see "Enforceability of Civil Liabilities."

ADSs holders may not be entitled to a jury trial with respect to claims arising under the deposit agreement, which could result in less favorable outcomes to the plaintiff(s) in any such action.

        The deposit agreement governing the ADSs representing our Class A ordinary shares provides that, subject to the depositary's right to require a claim to be submitted to arbitration, the federal or state courts in the City of New York have exclusive jurisdiction to hear and determine claims arising under the deposit agreement and in that regard, to the fullest extent permitted by law, ADS holders waive the right to a jury trial of any claim they may have against us or the depositary arising out of or relating to our Class A shares, the ADSs or the deposit agreement, including any claim under the U.S. federal securities laws.

        If we or the depositary opposed a jury trial demand based on the waiver, the court would determine whether the waiver was enforceable based on the facts and circumstances of that case in accordance with the applicable U.S. state and federal law. To our knowledge, the enforceability of a contractual pre-dispute jury trial waiver in connection with claims arising under the U.S. federal securities laws has not been finally adjudicated by the United States Supreme Court. However, we believe that a contractual pre-dispute jury trial waiver provision is generally enforceable, including under the laws of the State of New York, which govern the deposit agreement. In determining whether to enforce a contractual pre-dispute jury trial waiver provision, courts will generally consider whether a party knowingly, intelligently and voluntarily waived the right to a jury trial. We believe that this is the case with respect to the deposit agreement and the ADSs. It is advisable that you consult legal counsel regarding the jury waiver provision before investing in the ADSs.

        If you or any other holders or beneficial owners of ADSs bring a claim against us or the depositary in connection with matters arising under the deposit agreement or the ADSs, including claims under U.S. federal securities laws, you or such other holder or beneficial owner may not be entitled to a jury trial with respect to such claims, which may have the effect of limiting and discouraging lawsuits against us and/or the depositary. If a lawsuit is brought against us and/or the depositary under the deposit

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agreement, it may be heard only by a judge or justice of the applicable trial court, which would be conducted according to different civil procedures and may result in different outcomes than a trial by jury would have had, including results that could be less favorable to the plaintiff(s) in any such action.

        Nevertheless, if this jury trial waiver provision is not enforced, to the extent a court action proceeds, it would proceed under the terms of the deposit agreement with a jury trial. No condition, stipulation or provision of the deposit agreement or ADSs serves as a waiver by any holder or beneficial owner of ADSs or by us or the depositary of compliance with any substantive provision of the U.S. federal securities laws and the rules and regulations promulgated thereunder.

The voting rights of holders of ADSs are limited by the terms of the deposit agreement, and you may not be able to exercise your right to vote your Class A ordinary shares.

        Holders of ADSs do not have the same rights as our registered shareholders. As a holder of our ADSs, you will not have any direct right to attend general meetings of our shareholders or to cast any votes at such meetings. You will only be able to exercise the voting rights which are carried by the underlying Class A ordinary shares represented by your ADSs indirectly by giving voting instructions to the depositary in accordance with the provisions of the deposit agreement. Under the deposit agreement, you may vote only by giving voting instructions to the depositary. Upon receipt of your voting instructions, the depositary will try, as far as is practicable, to vote the Class A ordinary shares underlying your ADSs in accordance with your instructions. If we ask for your instructions, then upon receipt of your voting instructions, the depositary will try to vote the underlying Class A ordinary shares in accordance with these instructions. If we do not instruct the depositary to ask for your instructions, the depositary may still vote in accordance with instructions you give, but it is not required to do so. You will not be able to directly exercise your right to vote with respect to the underlying Class A ordinary shares unless you withdraw the shares, and become the registered holder of such shares prior to the record date for the general meeting. When a general meeting is convened, you may not receive sufficient advance notice of the meeting to withdraw the shares underlying your ADSs and become the registered holder of such shares to allow you to attend the general meeting and to vote directly with respect to any specific matter or resolution to be considered and voted upon at the general meeting. In addition, under our amended and restated articles of association, for the purposes of determining those shareholders who are entitled to attend and vote at any general meeting, our directors may close our register of members and/or fix in advance a record date for such meeting, and such closure of our register of members or the setting of such a record date may prevent you from withdrawing the Class A ordinary shares underlying your ADSs and becoming the registered holder of such shares prior to the record date, so that you would not be able to attend the general meeting or to vote directly. If we ask for your instructions, the depositary will notify you of the upcoming vote and will arrange to deliver our voting materials to you. We have agreed to give the depositary at least 30 days' prior notice of shareholder meetings. Nevertheless, we cannot assure you that you will receive the voting materials in time to ensure that you can instruct the depositary to vote the underlying Class A ordinary shares represented by your ADSs. In addition, the depositary and its agents are not responsible for failing to carry out voting instructions or for their manner of carrying out your voting instructions. The deposit agreement provides that if the depositary does not timely receive voting instructions from the ADS holders and if voting is by poll, then such holder shall be deemed, and the depositary shall deem such holder, to have instructed the depositary to give a discretionary proxy to a person designated by us to vote the Class A ordinary shares underlying the relevant ADSs, with certain limited exceptions. This means that you may not be able to exercise your right to direct how the shares underlying your ADSs are voted and you may have no legal remedy if the shares underlying your ADSs are not voted as you requested.

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You may not receive dividends or other distributions on our ordinary shares and you may not receive any value for them, if it is illegal or impractical to make them available to you.

        The depositary of our ADSs has agreed to pay you the cash dividends or other distributions it receives on ordinary shares or other deposited securities underlying our ADSs, after deducting its fees and expenses. You will receive these distributions in proportion to the number of Class A ordinary shares your ADSs represent. However, the depositary is not responsible if it decides that it is unlawful or impractical to make a distribution available to any holders of ADSs. For example, it would be unlawful to make a distribution to a holder of ADSs if it consists of securities that require registration under the Securities Act but that are not properly registered or distributed under an applicable exemption from registration. The depositary may also determine that it is not feasible to distribute certain property through the mail. Additionally, the value of certain distributions may be less than the cost of mailing them. In these cases, the depositary may determine not to distribute such property. We have no obligation to register under U.S. securities laws any ADSs, ordinary shares, rights or other securities received through such distributions. We also have no obligation to take any other action to permit the distribution of ADSs, ordinary shares, rights or anything else to holders of ADSs. This means that you may not receive distributions we make on our ordinary shares or any value for them if it is illegal or impractical for us to make them available to you. These restrictions may cause a material decline in the value of our ADSs.

You may experience dilution of your holdings due to the inability to participate in rights offerings.

        We may, from time to time, distribute rights to our shareholders, including rights to acquire securities. Under the deposit agreement, the depositary will not distribute rights to holders of ADSs unless the distribution and sale of rights and the securities to which these rights relate are either exempt from registration under the Securities Act with respect to all holders of ADSs, or are registered under the provisions of the Securities Act. The depositary may, but is not required to, attempt to sell these undistributed rights to third parties, and may allow the rights to lapse. We may be unable to establish an exemption from registration under the Securities Act, and we are under no obligation to file a registration statement with respect to these rights or underlying securities or to endeavor to have a registration statement declared effective. Accordingly, holders of ADSs may be unable to participate in our rights offerings and may experience dilution of their holdings as a result.

You may be subject to limitations on the transfer of your ADSs.

        Your ADSs are transferable on the books of the depositary. However, the depositary may close its books at any time or from time to time when it deems it expedient in connection with the performance of its duties. The depositary may close its books from time to time for a number of reasons, including in connection with corporate events such as a rights offering, during which time the depositary needs to maintain an exact number of ADS holders on its books for a specified period. The depositary may also close its books in emergencies, and on weekends and public holidays. The depositary may refuse to deliver, transfer or register transfers of our ADSs generally when our share register or the books of the depositary are closed, or at any time if we or the depositary thinks it is advisable to do so because of any requirement of law or of any government or governmental body, or under any provision of the deposit agreement, or for any other reason.

We are an emerging growth company within the meaning of the Securities Act and may take advantage of certain reduced reporting requirements.

        We are an "emerging growth company," as defined in the JOBS Act, and we may take advantage of certain exemptions from requirements applicable to other public companies that are not emerging growth companies including, most significantly, not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act of 2002 for so long as we remain an

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emerging growth company. As a result of our current status as an emerging growth company, our investors may not have access to certain information they may deem important.

We will incur increased costs as a result of being a public company, particularly after we cease to qualify as an "emerging growth company."

        We are now a public company and expect to incur significant legal, accounting and other expenses that we did not incur as a private company. The Sarbanes-Oxley Act of 2002, as well as rules subsequently implemented by the SEC and the New York Stock Exchange, impose various requirements on the corporate governance practices of public companies. As a company with less than US$1.07 billion in revenues for our last fiscal year, we qualify as an "emerging growth company" pursuant to the JOBS Act. An emerging growth company may take advantage of specified reduced reporting and other requirements that are otherwise applicable generally to public companies. These provisions include exemption from the auditor attestation requirement under Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, in the assessment of the emerging growth company's internal control over financial reporting. The JOBS Act also permits an emerging growth company to delay adopting new or revised accounting standards until such time as those standards apply to private companies. However, we have elected to "opt out" of this provision and, as a result, we will comply with new or revised accounting standards as required when they are adopted for public companies. This decision to opt out of the extended transition period under the JOBS Act is irrevocable.

        We expect these rules and regulations to increase our legal and financial compliance costs and to make some corporate activities more time-consuming and costly. After we are no longer an "emerging growth company," we expect to incur significant expenses and devote substantial management effort toward ensuring compliance with the requirements of Section 404 of the Sarbanes-Oxley Act of 2002 and the other rules and regulations of the SEC. We are currently evaluating and monitoring developments with respect to these rules and regulations, and we cannot predict or estimate with any degree of certainty the amount of additional costs we may incur or the timing of such costs.

As a company incorporated in the Cayman Islands, we are permitted to adopt certain home country practices in relation to corporate governance matters that differ significantly from the NYSE corporate governance listing standards; these practices may afford less protection to shareholders than they would enjoy if we complied fully with the NYSE corporate governance listing standards.

        As a Cayman Islands company listed on the New York Stock Exchange, we are subject to the NYSE corporate governance listing standards. However, the NYSE corporate governance listing standards permit a foreign private issuer like us to follow the corporate governance practices of its home country. Certain corporate governance practices in the Cayman Islands, which is our home country, may differ significantly from the NYSE corporate governance listing standards.

        Pursuant to Sections 303A.01, 303A.04, 303A.05 and 303A.07 of the New York Stock Exchange Listed Company Manual, a company listed on the New York Stock Exchange must have a majority of independent directors, a nominating and corporate governance committee composed entirely of independent directors, a compensation committee composed entirely of independent directors and an audit committee with a minimum of three members. We currently follow our home country practice in lieu of these requirements. We may also continue to rely on these and other exemptions available to foreign private issuers in the future, and to the extent that we choose to do so in the future, our shareholders may be afforded less protection than they otherwise would under the NYSE corporate governance listing standards applicable to U.S. domestic issuers. As a result, you may not be afforded the same protections or information, which would be made available to you, were you investing in a United States domestic issuer.

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There can be no assurance that we will not be a passive foreign investment company, or PFIC, for U.S. federal income tax purposes for any taxable year, which could result in adverse U.S. federal income tax consequences to U.S. Holders of our ADSs or ordinary shares.

        A non-U.S. corporation will be a passive foreign investment company, or PFIC, for any taxable year if either (i) at least 75% of its gross income for such year consists of certain types of "passive" income; or (ii) at least 50% of the value of its assets (based on an average of the quarterly values of the assets) during such year is attributable to assets that produce passive income or are held for the production of passive income (the "asset test"). Based on our income and assets (taking into account the market price of our ADSs), we do not anticipate being a PFIC for the current taxble year or in the foreseeable future. However, no assurance can be given in this regard because the determination of whether we are or will become a PFIC is a fact-intensive inquiry made on an annual basis that depends, in part, upon the composition of our income and assets. Fluctuations in the market price of our ADSs may cause us to become a PFIC for the current or subsequent taxable years because the value of our assets for the purpose of the asset test may be determined by reference to the market price of our ADSs. The composition of our income and assets may also be affected by how, and how quickly, we use our liquid assets and the cash raised in this offering.

        If we were to be or become a PFIC for any taxable year during which a U.S. Holder (as defined in "Taxation—United States Federal Income Tax Considerations") holds our ADSs or ordinary shares, certain adverse U.S. federal income tax consequences could apply to such U.S. Holder. See "Taxation—United States Federal Income Tax Considerations—Passive Foreign Investment Company Rules."

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