Commitments and contingencies (Details) - CNY (¥) ¥ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Capital commitment | ||
| Commitment capital expenditures | ¥ 258,378 | ¥ 1,199,691 |
| Equity investments with readily determinable fair value | ||
| Other commitments | ||
| Remaining commitment equity method investment | ¥ 941,200 | ¥ 654,000 |