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LONG-TERM INVESTMENTS - Equity investments without readily determinable fair value (Details) ¥ in Thousands |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May 11, 2020 | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Mar. 31, 2021 | Dec. 31, 2018 | Dec. 31, 2015
LONG-TERM INVESTMENTS |  |  |  |  |  |
Equity investments with readily determinable fair value |  | ¥ 51,524 | ¥ 51,524 |  |  |
Concord Healthcare Singapore Pte. Ltd |  |  |  |  |  |
LONG-TERM INVESTMENTS |  |  |  |  |  |
Percentage of equity interest sold |  | 8.73 | 10 |  |  |
Equity investments with readily determinable fair value |  | ¥ 22,925 | ¥ 22,925 |  |  |
Impairment |  | ¥ 0 | ¥ 0 |  |  |
Percentage of interest held after disposal | 10.00% | 8.73% |  |  |  |
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 |  |  |
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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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI https://asc.fasb.org/extlink&oid=126903467&loc=d3e32787-111569 + Details
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- Definition Fair value portion of investments accounted under the equity method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 25 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126960272&loc=d3e32014-111567 + Details
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