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CONCENTRATION OF RISKS (Details)
12 Months Ended
Dec. 31, 2024
issuer
customer
Dec. 31, 2023
issuer
customer
Dec. 31, 2022
customer
issuer
Foreign currency exchange rate risk      
Depreciation (appreciation) of the RMB against US dollar (as a percent) 2.80% 2.90% 8.20%
Customer concentration risk | Sales revenue      
CONCENTRATION OF RISKS      
Number of customers | customer 5 5 5
Concentration risk percentage 27.97% 28.39% 29.20%
Supplier concentration risk | Cost of goods      
CONCENTRATION OF RISKS      
Concentration risk percentage 95.00% 96.00% 93.00%
Number of suppliers | issuer 5 5 5