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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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