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Accounts receivable, net (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accounts receivable, net      
Accounts receivable ¥ 3,746,826 ¥ 3,164,023  
Allowance for credit losses (107,032) (96,959) ¥ (85,115)
Accounts receivable, net ¥ 3,639,794 ¥ 3,067,064