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v3.22.1

Derivative liability (Details) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2021 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2021 USD ($) | Aug. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt instrument term | 2 years |  |  |  |  |  |
Basic interest rate |  | 4.50% |  |  |  | 4.50% |
Additional interest rate |  | 5.50% | 5.50% |  |  |  |
Change in fair value of derivative liability (note 21) |  | ¥ 39 | $ 6 |  | ¥ 0 |  |
Net proceeds from issuance of debt |  | 386,635 | 60,671 | ¥ 857,110 | ¥ 934,406 |  |
Amortization of debt |  | ¥ 5,824 | $ 914 |  |  |  |
Amortization period |  | 2 years | 2 years |  |  |  |
Great Lion Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount | ¥ 31,863 |  |  |  |  |  | $ 5,000
Basic interest rate | 11.00% |  |  |  |  |  | 11.00%
Derivative liability, Notional amount |  | ¥ 1,969 |  |  |  | $ 309 |
Fair value of embedded derivative |  | 1,937 |  |  |  | 304 |
Net proceeds from issuance of debt |  | 31,863 | $ 5,000 |  |  |  |
Debt instrument, Carrying amount |  | 89,765 |  |  |  | 14,086 |
Vantage Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal amount | ¥ 63,726 |  |  |  |  |  | $ 10,000
Basic interest rate | 22.00% |  |  |  |  |  | 22.00%
Derivative liability, Notional amount |  | 3,894 |  |  |  | 611 |
Fair value of embedded derivative |  | 3,887 |  |  |  | 610 |
Net proceeds from issuance of debt |  | 63,726 | $ 10,000 |  |  |  |
Debt instrument, Carrying amount |  | ¥ 89,726 |  |  |  | $ 14,080 |

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