INVENTORIES, NET - Schedule of impairment of inventory written down (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Inventory written down [Roll Forward] | ||
| Balance at beginning of the year | ¥ 13,182 | ¥ 3,820 |
| Addition | 2,898 | 11,006 |
| Reduction | (12,976) | (1,644) |
| Balance at end of the year | ¥ 3,104 | ¥ 13,182 |