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FAIR VALUE MEASUREMENTS (Narrative) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016 CNY (¥)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2016 USD ($)
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Carrying amount, long-lived assets held and used	¥ 56,574				$ 8,149
Fair value, long-lived assets held and used	21,286				$ 3,066
Impairment charge, long-lived assets held and used	¥ 66,592	$ 9,591	¥ 23,125
Level 3 [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Discount rate	13.00%	13.00%

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Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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