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Short-Term Investments -Summary of Short Term Available For sale Products (Detail)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Debt securities:      
Held-to-maturity time deposit ¥ 1,803,362,875 $ 282,986,987 ¥ 584,229,003
Equity securities:      
Marketable wealth management products 330,857,592 51,918,777 71,584,410
Marketable investment in Li Auto 464,715,237 72,923,961 3,686,543,199
Total short-term investments ¥ 2,598,935,704 $ 407,829,725 ¥ 4,342,356,612