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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 (¥)
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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

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