v3.26.1
Additional Information-Parent Company Only Condensed Financial Information - Condensed statements of cash flows (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Additional Information-Parent Company Only Condensed Financial Information        
Net cash (used in)/provided by operating activities ¥ (363,600) $ (51,993) ¥ (280,185) ¥ (415,527)
Purchases of term deposits (742,525) (106,180) (673,373) (2,677,594)
Proceeds from withdrawal of term deposits 814,494 116,471 1,952,455 2,047,915
Net cash provided by investing activities (116,301) (16,632) 2,562,617 (1,681,140)
Proceeds received from employees in relation to share options and restricted shares 431 62 1,158 4,513
Net cash used in financing activities (131,629) (18,822) (403,862) (365,056)
Effect of exchange rate changes on cash and cash equivalents (18,293) (2,617) 14,851 42,510
Net (decrease)/increase in cash and cash equivalents (629,828) (90,064) 1,893,421 (2,419,213)
Cash, cash equivalents and restricted cash at beginning of the year 4,000,060 572,001 2,106,639 4,525,852
Cash, cash equivalents and restricted cash at end of the year 3,370,232 481,937 4,000,060 2,106,639
Reportable Legal Entities | Parent Company        
Additional Information-Parent Company Only Condensed Financial Information        
Net cash (used in)/provided by operating activities 17,866 2,555 18,577 (44,388)
Purchases of term deposits (502,525) (71,860) (69,150) (72,054)
Proceeds from withdrawal of term deposits 564,963 80,789 71,006  
Purchases of short-term investments (71,013) (10,155) (35,679)  
Proceeds of maturities of short-term investments     35,582  
Repayment from subsidiaries of investment 2,377,171 339,931 670,696 284,017
Investment in subsidiaries (2,015,804) (288,256) (258,192)  
Net cash provided by investing activities 352,792 50,449 414,263 211,963
Proceeds received from employees in relation to share options and restricted shares 431 62 1,158 4,513
Payments for repurchase of shares (167,060) (23,889) (400,707) (369,569)
Net cash used in financing activities (166,629) (23,827) (399,549) (365,056)
Effect of exchange rate changes on cash and cash equivalents (838) (121) 1,549 3,340
Net (decrease)/increase in cash and cash equivalents 203,191 29,056 34,840 (194,141)
Cash, cash equivalents and restricted cash at beginning of the year 37,711 5,393 2,871 197,012
Cash, cash equivalents and restricted cash at end of the year ¥ 240,902 $ 34,449 ¥ 37,711 ¥ 2,871