v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition, Restricted cash and Fair value (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
item
Dec. 31, 2025
USD ($)
item
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Disaggregation of Revenue        
Number of business models | item 2 2    
Obligation to pay interest and late fees, maximum threshold percentage 24.00% 24.00%    
Total net revenue ¥ 19,205,059 $ 2,746,287 ¥ 17,165,656 ¥ 16,290,027
Revenue, net of value-added tax and related surcharges:        
Performance obligations 635,422   551,785  
Revenue recognized from performance obligations 1,374,474      
Taxes excluded from revenues 1,137,538   1,044,160 991,176
Restricted cash        
Restricted cash related to deposit to the funding banks ¥ 934,546   ¥ 1,106,378  
Operating period 10 years 10 years    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01        
Revenue, net of value-added tax and related surcharges:        
Revenue, remaining performance obligation, Expected timing of satisfaction, period     12 months  
Revenue, remaining performance obligation (as a percent)     83.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01        
Revenue, net of value-added tax and related surcharges:        
Revenue, remaining performance obligation, Expected timing of satisfaction, period 12 months      
Revenue, remaining performance obligation (as a percent) 87.00%      
Asset Pledged as Collateral        
Restricted cash        
Deposits assets ¥ 439,000   ¥ 475,208  
Fair Value, Inputs, Level 2        
Restricted cash        
Other long-term liabilities ¥ 121,902      
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Noncurrent      
Fair Value, Inputs, Level 2 | Investments, swaps and forwards        
Restricted cash        
Estimated based on interbank market ¥ 125,096   160,028  
At a point in time        
Disaggregation of Revenue        
Total net revenue 5,317,000   5,372,000 4,485,000
Over time        
Disaggregation of Revenue        
Total net revenue 13,888,000   11,794,000 11,805,000
Credit driven services        
Disaggregation of Revenue        
Total net revenue 13,977,218 $ 1,998,716 11,719,027 11,738,560
Loan facilitation and servicing fees-capital heavy        
Disaggregation of Revenue        
Total net revenue 1,604,903 229,498 1,016,514 1,667,119
Revenue from loan facilitation services        
Disaggregation of Revenue        
Total net revenue 1,143,395   638,814 1,081,699
Revenue from post-facilitation services        
Disaggregation of Revenue        
Total net revenue 461,508   377,700 585,420
Financing income        
Disaggregation of Revenue        
Total net revenue 8,569,063 1,225,360 6,636,511 5,109,921
Revenue from releasing of guarantee liabilities        
Disaggregation of Revenue        
Total net revenue 3,412,952 488,046 3,695,017 4,745,898
Other services fees        
Disaggregation of Revenue        
Total net revenue 390,300 55,812 370,985 215,622
Platform services        
Disaggregation of Revenue        
Total net revenue 5,227,841 747,571 5,446,629 4,551,467
Loan facilitation and servicing fees-capital light        
Disaggregation of Revenue        
Total net revenue 1,162,563 166,244 2,116,797 3,213,955
Revenue from loan facilitation services        
Disaggregation of Revenue        
Total net revenue 683,929   1,246,541 2,096,085
Revenue from post-facilitation services        
Disaggregation of Revenue        
Total net revenue 478,634   870,256 1,117,870
Referral services fees        
Disaggregation of Revenue        
Total net revenue 2,738,786 391,641 2,842,637 950,016
Other services fees        
Disaggregation of Revenue        
Total net revenue ¥ 1,326,492 $ 189,686 ¥ 487,195 ¥ 387,496
Loan facilitation service        
Disaggregation of Revenue        
Number of separate services provided for each loan facilitated | item 3 3    
Number of separate performance obligations under ASC 606 | item 2 2