COMMITMENTS - Summary of the commitments outstanding (Details) - CNY (¥) ¥ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| COMMITMENTS | ||
| Contracted for purchase of inventories | ¥ 30,721 | ¥ 39,795 |
| Contracted for purchase of services | 216,807 | 216,807 |
| Contracted for capital investments | 9,000 | 20,520 |
| Total | ¥ 256,528 | ¥ 277,122 |