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Risk Assurance Liabilities - Summary of Movement of Risk Assurance Liabilities (Detail)
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Guarantees [Abstract]        
Balance at the beginning of the year ¥ 460,829,299 $ 72,314,173 ¥ 259,952,473  
Fair value of risk assurance liabilities upon the inception of new loans 443,831,604 69,646,863 348,921,174  
Performed risk assurance liabilities (403,388,438) (63,300,448) (150,312,528)  
Net loss on risk assurance liabilities 197,750,449 31,031,361 2,268,180 ¥ 34,257,754
Balance at the end of the year ¥ 699,022,914 $ 109,691,949 ¥ 460,829,299 ¥ 259,952,473