v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Intangible assets (Details)
Dec. 31, 2025
Software | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Useful life of intangible assets 3 years
Software | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Useful life of intangible assets 10 years
Technology | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Useful life of intangible assets 3 years
Technology | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Useful life of intangible assets 8 years
Land-use rights  
Finite-Lived Intangible Assets [Line Items]  
Useful life of intangible assets 50 years