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OTHER NON-CURRENT ASSETS (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items] |  |  |
Other Asset Impairment Charges | $ |  | $ 0 | $ 0
Arrangement for Cyberknife Robotic Radio Surgery System [Member] |  |  |
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items] |  |  |
Other Asset Impairment Charges | ¥ | ¥ 11,527 |  |

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