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LONG-TERM INVESTMENTS (Equity investments fair value) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2021 USD ($)	Mar. 31, 2021	Dec. 31, 2020 USD ($)	Dec. 31, 2018	Dec. 31, 2015
CHS
Equity interest			10.00%		10.00%
Equity Method Investments, Fair Value Disclosure | $			$ 22,925		$ 22,925
Impairment | ¥	¥ 0	¥ 0
Sale of Stock, Percentage of Ownership after Transaction	10.00%
Legion Healthcare Partners LLC
Equity interest			5.83%	5.83%
Equity Method Investments, Fair Value Disclosure | $			$ 6,439
Impairment | ¥	¥ 0
Allcure Information
Equity interest			9.60%		9.60%	9.60%	20.00%
Equity Method Investments, Fair Value Disclosure | $			$ 22,160		$ 22,160
Impairment | ¥	¥ 0	¥ 0

X

- 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 http://asc.fasb.org/extlink&oid=124268079&loc=d3e32787-111569

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
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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
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- Definition

Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

+ References

No definition available.

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