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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 USD ($)
Long-term Purchase Commitment [Line Items]
Rental expenses	¥ 17,765	$ 2,559	¥ 15,805	¥ 13,764
Unrecognized tax positions	65,284				$ 9,403
Capital Addition Purchase Commitments [Member]
Long-term Purchase Commitment [Line Items]
Commitments to purchase certain medical equipment	¥ 81,664		¥ 119,787		$ 11,762
Purchase commitments period	1 year	1 year

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Amount recognized for uncertainty in income taxes classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
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Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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-Name Accounting Standards Codification
-Topic 440
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-Section 50
-Paragraph 4
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