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Accounts receivable, net - Accounts Receivable, Net (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2023
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
CNY (¥)
Nonrelated Party      
Related party balances and transactions      
Accounts receivable   ¥ 288,507 ¥ 422,743
Less: Allowance for doubtful accounts   (2,688) (4,521)
Accounts receivable $ 40,257 285,819 418,222
Related Party      
Related party balances and transactions      
Accounts receivable   1,556,969 837,686
Less: Allowance for doubtful accounts   (11,217) (2,366)
Accounts receivable $ 217,715 ¥ 1,545,752 ¥ 835,320