LONG-TERM INVESTMENTS, NET - Equity investments measured under measurement alternative and NAV practical expedient (Details) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2025
CNY (¥)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
CNY (¥)
|
Dec. 31, 2023
CNY (¥)
|
|
| Long-term investments, net | ||||
| Impairment loss for equity investments accounted for using measurement alternative | ¥ 2,731 | $ 391 | ¥ 9,408 | ¥ 28,800 |
| Private equity fund | ||||
| Long-term investments, net | ||||
| Total carrying value | ¥ 59,400 | 60,700 | ||
| Investment lock-up period | 8 years | 8 years | ||
| Equity investments measured under measurement alternative | ||||
| Long-term investments, net | ||||
| Initial cost basis | ¥ 842,155 | 829,938 | ||
| Cumulated unrealized losses (including impairment) | (786,474) | (788,561) | ||
| Total carrying value | 55,681 | ¥ 41,377 | ||
| Upward adjustment | ¥ 0 | |||