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ACCOUNTS RECEIVABLE AND CONTRACT ASSETS, NET - Ageing analysis of accounts receivable (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Ageing analysis of accounts receivable    
Accounts receivable ¥ 4,590,098 ¥ 6,814,416
Less: allowance for credit losses (1,498,651) (1,517,099)
Accounts receivable, net 3,091,447 5,297,317
Up to 3 months    
Ageing analysis of accounts receivable    
Accounts receivable 2,198,699 4,315,046
3 months to 1 year    
Ageing analysis of accounts receivable    
Accounts receivable 727,822 649,209
Over 1 year    
Ageing analysis of accounts receivable    
Accounts receivable ¥ 1,663,577 ¥ 1,850,161