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Accounts Receivable, Net (Tables)
 12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Summary of Accounts Receivables And Related Allowance For Doubtful Accounts
Accounts receivable and the related allowance for doubtful accounts are summarized as follows:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     As of December 31,  
     2020      2021  
     RMB      RMB      US$  
Accounts receivable
      141,594,170        223,544,396        35,078,994  
Less: Allowance for doubtful accounts
      —          —          —    
    
 
 
     
 
 
     
 
 
  
Accounts receivable, net
      141,594,170        223,544,396        35,078,994