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Long-Term Investments (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule of Other Income Net | Total unrealized and realized gains and losses of equity investments without readily determinable fair values in 2019, 2020 and 2021 were as follows:
|  | For the years ended December 31 |
|  | 2019 |  |  | 2020 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Gross unrealized gains (upward adjustments) |  |  | 17,298 |  |  |  | — |  |  |  | — |  |  |  | — |
Gross unrealized losses (downward adjustments including impairment) |  |  | — |  |  |  | (39,181 | ) |  |  | (25,370 | ) |  |  | (3,981 | )
Net unrealized gains/losses on equity investments held |  |  | 17,298 |  |  |  | (39,181 | ) |  |  | (25,370 | ) |  |  | (3,981 | )
Net realized gains on equity investments sold |  |  | 6,778 |  |  |  | — |  |  |  | — |  |  |  | — |
Total net gains/losses recognized in other income, net |  |  | 24,076 |  |  |  | (39,181 | ) |  |  | (25,370 | ) |  |  | (3,981 | )

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