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PREPAID LAND LEASE PAYMENTS (Narrative) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Operating Leased Assets [Line Items] |  |  |  |  |  |
Amortization of intangible assets | ¥ 5,256 | $ 808 | ¥ 1,195 | ¥ 1,090 |  |
Prepaid Expense Other, Noncurrent | 456,823 |  | 445,444 |  | $ 70,212 | $ 0
Debt Instrument, Collateral Amount | 37,481 |  | 111,728 |  | 5,761 |
Secured Debt, Other | 29,725 |  | ¥ 78,445 |  | 4,569 |
Redeemable Noncontrolling Interest, Equity, Redemption Value | 396,281 |  |  |  | 60,907 | $ 0
Wuxi Concord Medical Development Ltd [Member] |  |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |  |
Prepaid Expense Other, Noncurrent | ¥ 11,379 |  |  |  | $ 1,749 |

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