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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Summary of Future Minimum Payments under Non-Cancelable Operating Leases
Future minimum payments under
non-cancelable
operating leases for office rental consist of the following as of December 31, 2021:
 
 
 
 
 
 
 
 
 
 
     RMB      US$  
Year ending December 31:
                 
2022
     15,710,485        2,465,318  
2023
     14,124,342        2,216,417  
2024
     13,873,588        2,177,069  
2025
     13,459,582        2,112,102  
2026
     13,459,582        2,112,102  
2027 and after
     48,629,836        7,631,082  
    
 
 
    
 
 
 
Total
     119,257,415        18,714,090