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v3.22.1

Other income (expenses) | 12 Months Ended
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Dec. 31, 2021
Other Income, Nonoperating [Abstract] |
Other income (expenses) |
18 | Other income (expenses)
|  | Year ended December 31, |
|  | 2019 |  |  | 2020 |  |  | 2021 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Government grants |  |  | 12,546 |  |  |  | 10,346 |  |  |  | 20,879 |  |  |  | 3,276 |
Gain on an equity investment sold (Note 7) |  |  | 6,778 |  |  |  | — |  |  |  | — |  |  |  | — |
Unrealized gain on equity investments held (Note 7) |  |  | 17,298 |  |  |  | — |  |  |  | — |  |  |  | — |
Impairment for long-term investments (Note 7) |  |  | — |  |  |  | (39,181 | ) |  |  | (25,370 | ) |  |  | (3,981 | )
Impairment for loan receivables (Note 4) |  |  | — |  |  |  | (4,500 | ) |  |  | (528 | ) |  |  | (83 | )
Income from ADR profit-sharing program |  |  | 2,190 |  |  |  | 2,257 |  |  |  | 2,111 |  |  |  | 332 |
Others |  |  | — |  |  |  | 264 |  |  |  | — |  |  |  | — |
Total |  |  | 38,812 |  |  |  | (30,814 | ) |  |  | (2,908 | ) |  |  | (456 | )

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