lending platforms, we may need to reduce our fees as well to comply with such regulations and to remain competitive in the online lending industry. If we are unable to compete with our competitors, or if we are forced to charge lower fees due to competitive pressures, we could experience reduced revenues or our platforms could fail to achieve market acceptance, any of which could materially and adversely affect our business and results of operations.
We have granted, and may continue to grant, low and nominally priced options, restricted share units and other types of awards under our share incentive plans, which may result in increased share-based compensation expenses.
Our performance is largely dependent on talented and highly-skilled individuals. Our future success depends on our continuing ability to identify, develop, motivate, and retain highly-skilled personnel. We have adopted share incentive plans to provide additional incentives in the forms of low and nominally priced options, restricted share units and other types of awards to employees, directors and consultants. See “Item 6. Directors, Senior Management and Employees—B. Compensation—Share Incentive Plans” for a detailed discussion. For the years ended December 31, 2017, 2018 and 2019, we recorded an aggregate of RMB75.7 million, RMB122.6 million RMB177.3 million (US$25.5 million), respectively, in share-based compensation expenses. 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 awards 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.
If the total addressable market for our target user cohort is smaller than what we believe it is, our results of operations may be adversely affected and our business may suffer.
It is very difficult to estimate the total addressable market for our target user cohort due to factors such as market demand, PRC regulations of the credit industry, competition, general economic conditions and the relatively short history of the online consumer finance industry in China. We believe that our total addressable market of users consists of educated young professionals. However, if there is less demand than we anticipate for loan products offered on our platform, it may materially and adversely impact our business, financial condition and results of operations.
Our quarterly results may fluctuate significantly due to the seasonality of our business and may not fully reflect the underlying performance of our business.
We experience some seasonality in our business, reflecting a combination of seasonal demand for consumer loans and seasonality patterns associated with the online retail industry. For example, we generally experience less user traffic and purchase orders during national holidays in China, particularly during the Chinese New Year holiday season in the first quarter of each year. Furthermore, e-commerce companies in China hold special promotional campaigns on November 11 each year, which improve our results for that quarter. The demand for our products and services is higher in March, April, September, October and November, which generally corresponds to the start of school and our promotional activities around November 11. While our rapid growth has somewhat masked this seasonality, our quarterly operating results could be affected by such seasonality in the future.
Therefore, our quarterly results of operations, including our operating revenue, expenses, net loss or income and other key metrics, may vary significantly in the future, and period-to-period comparisons of our operating results may not be meaningful. Accordingly, the results for any single quarter are not necessarily an indication of future performance.
We face risks related to natural disasters, health epidemics and other outbreaks, which could significantly disrupt our operations.
In addition to the impact of COVID-19, our business could also be adversely affected by the effects of epidemics, including avian influenza, sever acute respiratory syndrome (SARS), influenza A (H1N1), Ebola, Zika virus, H7N9 flu, avian flu or another pandemic. Any such occurrences could cause sever disruption to our daily operations. In recent years, there have been outbreaks of epidemics in China and globally. Our business could also be adversely affected if our employees are affected by health epidemics. In addition, our results of operations could be adversely affected to the extent that any health epidemic harms the Chinese economy in general. Our headquarters are located in Shenzhen, where most of our directors and management and a significant portion of our employees currently reside. Most of our in-house and outsourcing collection team, customer service team are located in Wuhan. Most of our system hardware and back-up systems are hosted in leased facilities located in Shenzhen, Guangzhou and Beijing. Consequently, we are highly susceptible to factors adversely affecting Shenzhen, Wuhan, Guangzhou and Beijing. If any of the abovementioned natural disasters, health epidemics or other outbreaks were to occur in Shenzhen, Wuhan, Guangzhou, Beijing, or any other city where we have major operations in China, our operation may experience material disruptions, such as temporary closure of our offices and suspension of services, which may materially and adversely affect our business, financial condition and results of operations.