v3.25.2
CONCENTRATION AND RISKS - Schedule of concentration risk of accounts and notes receivable from third parties (Details) - Accounts and Notes Receivable - Credit Risk - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Company A    
Concentration and risks    
Accounts and notes receivable ¥ 9,653 ¥ 27,371
Concentration risk, percentage 40.00% 74.00%
Company B    
Concentration and risks    
Accounts and notes receivable ¥ 4,440  
Concentration risk, percentage 18.00%