Material related party transactions - Summary of Key Management Personnel Compensation (Details) - CNY (¥) ¥ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of transactions between related parties [abstract] | ||
| Short-term employment benefits (excluding discretionary bonus) | ¥ 8,972 | ¥ 8,037 |
| Discretionary bonus | 4,376 | 5,470 |
| Contributions to defined contribution retirement plans | 109 | 135 |
| Share-based compensation expenses | 40,047 | 165,528 |
| Total | ¥ 53,504 | ¥ 179,170 |