v3.26.1
TAXATION - Reconciliation of tax (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]          
Income before income taxes ¥ 5,280,175 $ 753,632 ¥ 3,726,262 ¥ 3,102,164  
Income tax expenses computed at PRC statutory income tax rate of 25% 1,320,044 188,408 931,565 775,541  
Tax credits          
Additional deduction for R&D expenses (20,675) (2,951) (17,699) (19,397)  
Non-deductible share-based compensation expenses 100,965 14,411 60,020 45,722  
Non-deductible expenses and non-taxable income 48,846 6,971 11,026 5,378  
Change of valuation allowance 70,521 10,065 303,889 616,962  
Changes in unrecognized tax benefits (21,834) (3,116) 6,853 24,536  
Effect of changes in tax laws or rates enacted in the current period (392) (56)   725  
Income tax expenses ¥ 1,679,793 $ 239,755 ¥ 770,553 ¥ 258,127  
Tax Jurisdiction of Domicile [Extensible Enumeration] PRC PRC PRC PRC  
Tax credits (as a percent)          
Income tax expenses computed at PRC statutory income tax rate of 25% (as a percent) 25.00% 25.00% 25.00% 25.00%  
Effective Income Tax Rate Reconciliation, Tax Credit, Percent [Abstract]          
Additional deduction for R&D expenses (as a percent) 0.00% 0.00% 0.00% (1.00%)  
Non-deductible share-based compensation expenses (as a percent) 2.00% 2.00% 2.00% 1.00%  
Non-deductible expenses and non-taxable income (as a percent) 1.00% 1.00% 0.00% 0.00%  
Change in valuation allowance (as a percent) (1.00%) (1.00%) (8.00%) (19.00%)  
Changes in unrecognized tax benefits (as a percent) 0.00% 0.00% 0.00% 1.00%  
Effect of changes in tax laws or rates enacted in the current period (as a percent) 0.00% 0.00%   0.00%  
Income tax expense (as a percent) 32.00% 32.00% 21.00% 8.00%  
Undistributed earnings ¥ 318,000       $ 45,400
Hong Kong          
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]          
Statutory tax rate difference between Hong Kong, PRC and PRC 1,764 $ 252 ¥ (2,725) ¥ (2,839)  
Withholding tax on distributable earnings 339,797 48,499      
Others ¥ (2,459) $ (351) ¥ 38 ¥ (470)  
Tax credits (as a percent)          
Statutory tax rate difference between Hong Kong, PRC and PRC (as a percent) 0.00% 0.00% 0.00% 0.00%  
Withholding tax on distributable earnings (as a percent) 6.00% 6.00%      
Others (as a percent) 0.00% 0.00% 0.00% 0.00%  
Other foreign jurisdictions          
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]          
Others ¥ 78,059 $ 11,141 ¥ 6,163 ¥ 39,282  
Tax credits (as a percent)          
Others (as a percent) 1.00% 1.00% 0.00% 1.00%  
PRC          
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]          
Others ¥ (93,801) $ (13,388) ¥ 79,201 ¥ 6,611  
Tax credits (as a percent)          
Others (as a percent) (2.00%) (2.00%) 2.00% 0.00%