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FAIR VALUE MEASUREMENTS (Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018 CNY (¥)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2018 USD ($)
Fair Value Measurement Recurring Basis [Line Items]
Contingent consideration payable	¥ 1,322	¥ 6,766	$ 192
Fair Value, Measurements, Recurring [Member]
Fair Value Measurement Recurring Basis [Line Items]
Contingent consideration payable | ¥	¥ 1,322	¥ 6,766
Fair Value, Measurements, Recurring [Member] | Valuation Technique, Discounted Cash Flow [Member]
Fair Value Measurement Recurring Basis [Line Items]
Business Combination Contingent Consideration Liability Valuation Techniques	Discounted cash flow method	Discounted cash flow method
Fair Value, Measurements, Recurring [Member] | Measurement Input, Discount Rate [Member]
Fair Value Measurement Recurring Basis [Line Items]
Discount rate | Pure	14.8	14.8	14.8

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The Disclosure of Business Combination Contingent Consideration Liability Valuation Techniques

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Fair Value Measurement Recurring Basis

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Value of input used to measure contingent consideration liability from business combination.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
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Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

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-Publisher FASB
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-SubTopic 30
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