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v3.25.1

Derivative liability (Details) ¥ in Thousands, $ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2021 USD ($) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2024 HKD ($) | Dec. 31, 2023 USD ($)
Derivative liability |  |  |  |  |  |  |  |
Debt instrument term | 2 years |  |  |  |  |  |  |
Basic interest rate |  | 4.50% |  |  |  | 4.50% | 4.50% |
Additional interest rate |  | 5.50% | 5.50% |  |  |  |  |
Derivative liability | ¥ |  | ¥ 0 |  | ¥ 163 |  |  |  |
Change in fair value of derivative liability |  | 166 | $ 23 | 5,207 | ¥ 1,015 |  |  |
Net proceeds from issuance of debt |  | 1,917,174 | 262,652 | 110,000 | 422,765 |  |  |
Repayment of debt |  | 1,391,219 | 190,596 | 7,561 | ¥ 197,003 |  |  |
Debt instrument, Carrying amount |  | 80,292 |  | 106,499 |  | $ 11,000 |  |
Great Lion Debt |  |  |  |  |  |  |  |
Derivative liability |  |  |  |  |  |  |  |
Principal amount | $ 5,000 |  |  |  |  |  |  |
Basic interest rate | 11.00% |  |  |  |  |  |  |
Fair value of embedded derivative |  |  |  | 57 |  |  |  | $ 8
Interest expense |  | 27,631 | 3,785 |  |  |  |  |
Net proceeds from issuance of debt |  | 36,497 | 5,000 |  |  |  |  |
Debt instrument, Carrying amount |  |  |  |  |  | 5,000 |  |
Interest payable |  | ¥ 31,555 |  |  |  | $ 4,323 | $ 33,580 |
Vantage Debt |  |  |  |  |  |  |  |
Derivative liability |  |  |  |  |  |  |  |
Principal amount | $ 10,000 |  |  |  |  |  |  |
Basic interest rate | 22.00% | 10.00% |  |  |  | 10.00% | 10.00% |
Fair value of embedded derivative |  |  |  | ¥ 106 |  |  |  | $ 15
Interest expense |  | ¥ 16,590 | 2,273 |  |  |  |  |
Net proceeds from issuance of debt |  | 72,993 | 10,000 |  |  |  |  |
Repayment of debt |  | 29,197 | $ 4,000 |  |  |  |  |
Debt instrument, Carrying amount | ¥ |  | 6,000 |  |  |  |  |  |
Interest payable |  | ¥ 23,616 |  |  |  | $ 3,235 |  |

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