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EMPLOYEE DEFINED CONTRIBUTION PLAN (Narrative) (Details) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018 CNY (¥)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 CNY (¥)	Dec. 31, 2016 CNY (¥)
China [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions to defined contribution plans	¥ 13,291	$ 1,933	¥ 13,348	¥ 13,078
Singapore [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Contributions to defined contribution plans	¥ 315	$ 46	¥ 399	¥ 265

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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