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ACQUISITIONS AND DISPOSALS (Narrative) (Details) |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |
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Oct. 08, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥) | Oct. 18, 2017 CNY (¥) | May 31, 2017 CNY (¥) | Apr. 30, 2017 CNY (¥) | Sep. 29, 2016 CNY (¥) | Jan. 27, 2016 CNY (¥) | Jan. 25, 2016 CNY (¥) | Jan. 25, 2016 USD ($) | Dec. 18, 2007 CNY (¥) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 28, 2012 CNY (¥) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 | Jun. 30, 2018 | Jun. 29, 2018 | Dec. 20, 2017 | Oct. 18, 2017 USD ($) | Apr. 06, 2017 CNY (¥) | Jan. 25, 2016 USD ($) | Dec. 31, 2015 CNY (¥) | Jun. 30, 2015
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Total consideration | ¥ 182,100,000 | ¥ 11,820,000 |  | ¥ 105,119,000 |  | ¥ 41,670,000 |  |  |  |  | ¥ 182,100 |  |  | ¥ 100,000,000 | ¥ 201,176,000 |  |  |  |  |  |  |  |  |  |
Other Payments to Acquire Businesses |  |  |  |  |  |  |  |  |  | ¥ 29,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |
Payments to Fund Operations of Acquiree |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 1,000,000 |
Payments to Acquire Other Productive Assets |  |  |  |  |  |  |  |  |  |  | 0 | $ 0 | ¥ 6,705,000 | 3,025,000 |  |  |  |  |  |  |  |  |  |  |
Deposits Assets, Noncurrent |  | 266,180,000 |  |  |  |  |  |  |  |  | 637,838,000 |  | 266,180,000 |  |  | $ 92,770,000 |  |  |  |  |  |  |  |  |
Subscribed Amount to be Injected in Acquisition of Equity Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 388,500,000 |  |  |
Gain Loss On Disposal Beijing Century Friendship and BPMC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,046 |  |  |  |  |  | ¥ 58,854,000 |  |  |
Business Combination, Consideration Transferred | ¥ 182,100,000 | ¥ 11,820,000 |  | ¥ 105,119,000 |  | ¥ 41,670,000 |  |  |  |  | 182,100 |  |  | 100,000,000 | ¥ 201,176,000 |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 71.32% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain From Revaluation Of Equity Interest |  |  |  |  |  |  |  |  |  |  | 28,846,000 | 4,195,000 | ¥ 0 | ¥ 0 |  |  |  |  |  |  |  |  |  |  |
Other Income [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain On Revaluation Of Investment |  |  |  |  |  |  |  |  |  |  | ¥ 21,697,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 26.06% |  |  |  |  |  |
Partners' Capital Account, Contributions |  |  |  |  | ¥ 262,999,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tianjin Jiatai Entity Management limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  | 28.77% |  |  |  |  |  |  |  |  | 78.31% |  | 28.77% |  |  | 78.31% | 78.31% |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 106,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 28.77% |  |  |  |  |  |  |  |  | 78.31% |  | 28.77% |  |  | 78.31% | 78.31% |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 106,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 22.82% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions | $ |  |  |  |  |  |  |  |  |  |  |  | $ 78.31 |  |  |  |  |  |  |  |  |  |  |  |  |
Shanghai Meizhongjiahe ProMed Cancer Centers Co., Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  | 54.80% |  |  |  |  |  |  |  |  | 55.00% |  | 54.80% |  |  | 55.00% |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 182,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 54.80% |  |  |  |  |  |  |  |  | 55.00% |  | 54.80% |  |  | 55.00% |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 182,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% | 35.20% |  |  |  |  |  |
Beijing Proton Medical Center Co Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  |  |  |  |  | 54.80% |  |  |  |  | 54.80% |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  | 54.80% |  |  |  |  | 54.80% |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00% | 25.00% |  |  |  |  |  |
Beijing Century Friendship Science and Technology Development Co., Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  | 388,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 388,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 21.69% |  |  |  |  |  |
Licensing Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | ¥ 164,440,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Licensing Agreements One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | ¥ 272,910,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | ¥ 16,010,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 12 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shanghai Rongchi Medical Management Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  | ¥ 388,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  | 388,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | 24.40% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZR Guofu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions |  |  |  |  |  |  |  |  |  |  | 746,001,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
ZR Guofu [Member] | Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions |  |  |  |  |  |  |  |  |  |  | ¥ 746,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
JWYK [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interest transferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00%
Allcure Information [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized a gain on the disposal |  |  | ¥ 59,000 |  |  |  |  | ¥ 3,341,000 | $ 486,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  | ¥ 3,000 |  |  |  |  | ¥ 8,594,000 |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 1,250,000 |  |
Beijing Century Friendship and BPMC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 21.69% |  |  |  |  |  |  |  |  |  |  | 21.69% |  |  |  |  |  |  |  |  | 78.31% |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 55.00% |  |  |
Guofu Huimei [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent |  |  |  |  |  |  |  |  |  |  | 20.41% |  |  |  |  | 20.41% |  |  |  |  |  |  |  |  |
Beijing Proton Medical Center [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interest acquired |  |  |  |  |  |  | 55.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  | ¥ 100,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  | 55.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Other Productive Assets |  |  |  |  |  |  | ¥ 99,851,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits Assets, Noncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 70,000,000 |
Business Combination, Consideration Transferred |  |  |  |  |  |  | ¥ 100,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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