PREPAYMENTS AND OTHER CURRENT ASSETS - Activity in the allowance for credit losses (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Activity in the allowance for credit losses | |||
| At beginning of year | ¥ 68,404 | ¥ 79,585 | ¥ 8,118 |
| Addition | 0 | 0 | 71,467 |
| Reversal | (933) | (11,181) | 0 |
| Write off | (77) | 0 | 0 |
| At end of year | ¥ 67,394 | ¥ 68,404 | ¥ 79,585 |