v3.26.1
INCOME TAXES - Reconciliations of the differences between statutory income tax and effective income tax (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
INCOME TAXES        
Income before income tax expenses ¥ 7,376,135 $ 1,054,775 ¥ 7,892,422 ¥ 5,277,451
Statutory tax rate in the PRC 25.00% 25.00% 25.00% 25.00%
Reconciliation, Amount        
Income tax at statutory tax rate ¥ 1,844,033   ¥ 1,973,106 ¥ 1,319,363
Changes in valuation allowance     15,486 26,715
Effect of different tax rate of subsidiary operation in other jurisdiction     (10,324) (4,016)
Non-deductible expenses        
Share-based compensation 94,593      
Others 3,300   42,726 47,467
Preferential tax rate (679,618)   (744,996) (488,462)
Research and development super-deduction (62,704)   (102,658) (98,914)
Effect of cross-border tax laws 292,627      
Withholding income tax     470,966 206,721
Income tax expense ¥ 1,400,492 $ 200,268 ¥ 1,644,306 ¥ 1,008,874
Tax Jurisdiction of Domicile [Extensible Enumeration] PRC PRC    
Reconciliation, Percent        
Income tax at statutory tax rate 25.00% 25.00% 25.00% 25.00%
Non-deductible expenses        
Share-based compensation 1.30% 1.30%    
Others 0.00% 0.00%    
Preferential tax rate (9.20%) (9.20%)    
Research and development super-deduction (0.90%) (0.90%)    
Effect of cross-border tax laws 4.00% 4.00%    
Effective tax rate 19.00% 19.00%    
PRC        
INCOME TAXES        
Statutory tax rate in the PRC 25.00% 25.00%    
Reconciliation, Amount        
Changes in valuation allowance ¥ 12,513      
Reconciliation, Percent        
Income tax at statutory tax rate 25.00% 25.00%    
Changes in valuation allowance 0.20% 0.20%    
Hong Kong        
Reconciliation, Amount        
Foreign Tax effects ¥ (93,831)      
Tax exemption (94,774)      
Changes in valuation allowance ¥ 943      
Reconciliation, Percent        
Foreign Tax effects (1.30%) (1.30%)    
Tax exemption (1.30%) (1.30%)    
Changes in valuation allowance 0.00% 0.00%    
Others        
Reconciliation, Amount        
Other foreign jurisdictions ¥ (10,421)      
Reconciliation, Percent        
Other foreign jurisdictions (0.10%) (0.10%)