Organization and principal activities - Schedule of Condensed Consolidated Statements Data for the VIEs (Parenthetical) (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| VIEs | |||
| Investments in and Advances to Affiliates | |||
| Outstanding balances for Variable Interest Entity fees Charged | ¥ 0 | ¥ 0 | |
| Service fees receivable from variable interest entity set off against intercompany receivables | 0 | 212,000 | ¥ 139,000 |
| Wholly foreign-owned enterprise And Other Subsidiaries | |||
| Investments in and Advances to Affiliates | |||
| Variable interest entity service fees charged amount | 4,783,000 | 4,622,000 | 5,530,000 |
| Payment of Variable Interest Entity Service Fees | ¥ 4,783,000 | ¥ 4,410,000 | ¥ 5,391,000 |