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Contract liabilities - Schedule of contract liabilities (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2024 USD ($)
Related party balances and transactions |  |  |
Contract liabilities, current and non-current | ¥ 194,153 | ¥ 341,633 |
Revenue recognized from contract liabilities | 181,140 | 321,215 |
Transaction price allocated to the performance obligation | 194,153 | 341,633 |
Nonrelated Party |  |  |
Related party balances and transactions |  |  |
Contract liabilities, current | 6,357 | 621 | $ 871
Contract liabilities, non-current | 20 | 2 | 3
Related Party |  |  |
Related party balances and transactions |  |  |
Contract liabilities, current | 150,452 | 207,017 | 20,612
Contract liabilities, non-current | ¥ 37,324 | ¥ 133,993 | $ 5,113

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