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Revenue information - Schedule of contract liabilities (Details)
¥ in Thousands, $ in Thousands
Jun. 30, 2024
CNY (¥)
Jun. 30, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Related party balances and transactions      
Contract liabilities, current and non-current ¥ 283,235   ¥ 341,633
Nonrelated Party      
Related party balances and transactions      
Contract liabilities, current 1,517 $ 209 621
Contract liabilities, non-current 6 1 2
Related Party      
Related party balances and transactions      
Contract liabilities, current 202,919 27,923 207,017
Contract liabilities, non-current ¥ 78,793 $ 10,842 ¥ 133,993