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Profit Appropriation and Restricted Net Assets - Additional Information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Profit Appropriation and Restricted Net Assets [Line Items]      
Allocation of after-tax profits to statutory surplus fund, percentage 10.00%    
Limit of statutory surplus fund as a percentage of registered capital, after which allocations to statutory surplus fund are no longer required 50.00%    
Variable Interest Entities      
Profit Appropriation and Restricted Net Assets [Line Items]      
General reserve fund of after-tax profits percentage 10.00%    
Statutory reserves ¥ 42,781 $ 6,713 ¥ 31,494
Amounts of restricted paid-in capital and reserve funds of PRC subsidiaries and net assets of VIEs ¥ 19,493,231 $ 3,058,913