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OTHER NON-CURRENT ASSETS (Schedule of Other Non-Current Assets) (Parenthetical) (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥) | Jun. 21, 2011 CNY (¥)
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Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items] |  |  |  |  |
Deposits - long-term | [1] | ¥ 2,719 | $ 395 | ¥ 20,747 |
Arrangement for Robotic Radio Surgery System [Member] |  |  |  |  |
Schedule Of Long Term Prepayment Deposits And Other Assets [Line Items] |  |  |  |  |
Deposits - long-term |  |  |  |  | ¥ 23,608
[1] | On June 21, 2011, the Group provided interest-free financing amounting to RMB23,608 to Changhai Hospital, a third party, for the purchase of a robotic radiosurgery system, impairment losses of RMB11,527 was provided for the remaining balances as of December 31, 2018.

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- Definition The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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