TAXATION - Valuation allowance (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Deferred Tax Assets, Valuation Allowance | |||
| Balance at the beginning of the year | ¥ (4,127,927) | ¥ (3,385,876) | ¥ (3,310,975) |
| Remeasurement due to application of preferential tax rate | 0 | (1,839) | (17,011) |
| Additions | (687,555) | (1,280,549) | (794,643) |
| Reversals | 549,598 | 282,244 | 687,180 |
| Write-offs | 341,418 | 258,093 | 49,573 |
| Balance at the end of the year | ¥ (3,924,466) | ¥ (4,127,927) | ¥ (3,385,876) |