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Cost of Revenue - Summary of Cost of Revenue (Detail)
12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Cost of Revenue [Abstract]        
Cost of vehicle ¥ 2,210,715,054 $ 346,909,433 ¥ 619,227,148 ¥ 11,176,116
Commission to car dealerships 375,702,902 58,955,984 117,985,878 158,100,562
Leasing interest expense 119,692,726 18,782,401 132,322,922 116,965,519
Staff cost 105,771,335 16,597,831 73,975,397 72,999,170
Staff incentive 61,894,967 9,712,671 84,046,881 98,173,090
Others 84,232,888 13,217,977 70,562,523 81,852,960
Cost of revenue ¥ 2,958,009,872 $ 464,176,297 ¥ 1,098,120,749 ¥ 539,267,417