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Short-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Short-term Investments [Abstract] |
Summary of Short Term Available For sale Products | The Company classifies the valuation techniques that use these inputs as Level 1 of fair value measurements.
|  | As of December 31, |
|  | 2020 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | US$ |
Debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity time deposit |  |  | 584,229,003 |  |  |  | 1,803,362,875 |  |  |  | 282,986,987 |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |
Marketable wealth management products |  |  | 71,584,410 |  |  |  | 330,857,592 |  |  |  | 51,918,777 |
Marketable investment in Li Auto |  |  | 3,686,543,199 |  |  |  | 464,715,237 |  |  |  | 72,923,961 |
Total short-term investments |  |  | 4,342,356,612 |  |  |  | 2,598,935,704 |  |  |  | 407,829,725 |

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