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Contract liabilities - Schedule of contract liabilities (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 CNY (¥) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2023 USD ($)
Related party balances and transactions |  |  |  |
Contract liabilities, current and non-current | ¥ 341,633 | ¥ 603,523 |  |
Revenue recognized from contract liabilities | 321,215 | 364,004 | ¥ 159,371 |
Transaction price allocated to the performance obligation | 341,633 | 603,523 |  |
Nonrelated Party |  |  |  |
Related party balances and transactions |  |  |  |
Contract liabilities, current | 621 | 4,706 |  | $ 87
Contract liabilities, non-current | 2 | 70 |  | 0
Related Party |  |  |  |
Related party balances and transactions |  |  |  |
Contract liabilities, current | 207,017 | 316,667 |  | 29,158
Contract liabilities, non-current | ¥ 133,993 | ¥ 282,080 |  | $ 18,873

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