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EMPLOYEE DEFINED CONTRIBUTION PLAN (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
CHINA |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Contributions to defined contribution plans | $ 3,285 | ¥ 22,868 | ¥ 13,291 | ¥ 13,348
Singapore [Member] |  |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |  |
Contributions to defined contribution plans | $ 42 | ¥ 290 | ¥ 315 | ¥ 399

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