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LONG-TERM INVESTMENTS - Equity investments without readily determinable fair value (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2024 CNY (¥) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 CNY (¥) | Aug. 31, 2023 | Mar. 31, 2021 | Dec. 31, 2018 | Dec. 31, 2015
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Equity investments with readily determinable fair value | ¥ 28,699 |  | ¥ 51,624 |  |  |  |
CHS |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Business Combination, Consideration Transferred | ¥ 27,664 | $ 3,790 |  |  |  |  |
Concord Healthcare Singapore Pte. Ltd |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Percentage of equity interest sold | 0 |  | 8.73 |  |  |  |
Equity investments with readily determinable fair value |  |  | ¥ 22,925 |  |  |  |
Legion Healthcare Partners LLC |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Percentage of equity interest sold | 5.83 |  | 5.83 |  | 5.83 |  |
Equity investments with readily determinable fair value | ¥ 6,439 |  | ¥ 6,439 |  |  |  |
Impairment | ¥ 0 |  | ¥ 0 |  |  |  |
Beijing He Xu elderly Care Service Co., LTD |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Percentage of equity interest sold | 4 |  | 4 | 4 |  |  |
Remaining ownership interest percentage | 4.00% |  |  |  |  |  |
Equity investments with readily determinable fair value | ¥ 100 |  | ¥ 100 |  |  |  |
Impairment | ¥ 0 |  |  |  |  |  |
Allcure Information |  |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |  |
Percentage of equity interest sold | 9.6 |  | 9.6 |  |  | 9.6 | 20
Equity investments with readily determinable fair value | ¥ 22,160 |  | ¥ 22,160 |  |  |  |
Impairment | ¥ 0 |  | ¥ 0 |  |  |  |

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