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LONG-TERM INVESTMENTS (Narrative) (Details) ¥ / shares in Units, ¥ in Thousands, $ in Thousands |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 13, 2019 USD ($) | Nov. 13, 2019 CNY (¥) | Jul. 11, 2019 ¥ / shares | Jul. 31, 2015 CNY (¥) | Dec. 31, 2012 CNY (¥) | Dec. 28, 2012 | Jul. 31, 2018 CNY (¥) | May 31, 2017 | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥) ¥ / shares | Dec. 31, 2017 CNY (¥) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2019 CNY (¥) | Aug. 23, 2019 CNY (¥) | Jul. 22, 2019 CNY (¥) | Mar. 31, 2019 CNY (¥) | Nov. 29, 2018 CNY (¥) | Jun. 30, 2018 CNY (¥) | Dec. 31, 2011
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of net profit (loss) |  |  |  |  |  |  |  |  | $ (729) | ¥ (5,078) | ¥ (20,747) | ¥ 1,454 |  |  |  |  |  |  |  |
Cash distribution from an equity investee |  |  |  |  |  |  |  |  | 0 | ¥ 0 | 11,626 | 6,227 |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  | $ 6,146 |  | ¥ 366,204 |  |  | ¥ 42,788 |  |  |  |  |  |
Maximum voting percentage required to pass resolution |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |
Capital Contributed |  |  |  |  |  |  |  |  |  |  |  | 10,000 |  |  |  |  |  |  |  |
Third Party Subscription Amount Per Share | ¥ / shares |  |  |  |  |  |  |  |  |  |  | ¥ 0.49 |  |  |  |  |  |  |  |  |
Proceeds from Sale of Equity Method Investments |  |  |  |  |  |  |  |  | $ 973 | ¥ 6,779 | ¥ 212,855 | 0 |  |  |  |  |  |  |  |
RHHPL |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 49.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Third Party Subscription Amount Per Share | ¥ / shares |  |  | ¥ 0.49 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tianjin Jiatai Entity Management limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  | ¥ 106,500 |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  |  |  | 28.77% |  |  |  |  |  |  |  |
Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 746,000 |
MDA Proton [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Including Discontinued Operation, Consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 212,855 |  |
Disposal Group, Deferred Gain on Disposal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 48,019 |  |
Proceeds from Sale of Equity Method Investments |  |  |  |  |  |  |  |  | 973 | ¥ 6,779 |  |  |  |  |  |  |  |  |  |
Discontinued Operation Equity Method Investment Retained After Disposal |  |  |  |  |  |  |  |  | $ 3,551 |  | 31,497 |  |  | ¥ 24,718 |  |  |  |  |  |
PTC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of net profit (loss) |  |  |  |  |  |  |  |  |  |  | ¥ 509 |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 14.34% |  | 44.55% |  |  | 59.51% |  |  |  |  | 59.51% |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  | ¥ 30,063 | ¥ 201,176 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PTC GP Management LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Legal Interest Percentage |  |  |  | 17.07 |  | 45 |  |  |  |  |  |  |  |  |  |  |  |  |  |
General Partner of PTC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
MDA Proton [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Legal Interest Percentage |  |  |  |  |  |  |  |  | 45.41 | 45.41 |  |  |  |  |  |  |  |  |  |
Tianjin Jiatai Group [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90.00% |  |  |  |
Capital Contributed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 27,000 |  |  |  |
SH MZJH |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  | 56.77% |  |  |  |  |  | 78.34% |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  | ¥ 27,000 |  |  |  |  |  |  |  |  |  |
Capital Contributed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 34,540 |  |  |
Suzhou Chorus Medical Technologies Co., Ltd. ("Suzhou Chorus') [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 0.00% |  | 36.00% |  | 36.00% | 0.00% |  |  |  |  |  |
Equity Method Investment, Ownership Description |  |  |  |  |  |  |  | The consideration was received by the Group in April 2016. The disposal of Suzhou Chorus was completed in 2019. |  |  |  |  |  |  |  |  |  |  |  |
Global Oncology One, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 4,320 |  |  |  |  |  |  |
PTC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share of net profit (loss) |  |  |  |  |  |  |  |  |  | 0 |  | ¥ 17,697 |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 59.51% |  | 59.51% |  |  | 59.51% |  |  |  |  |  |
Allcure Information [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 9.60% |  | 9.60% |  | 20.00% | 9.60% |  |  |  |  |  |
Wuxi Meizhong Jiahe Cancer Center [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 0.00% |  | 10.00% |  |  | 0.00% |  |  |  |  |  |
Capital Contributed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 82,110 |  |  |  |  |
Suzhou Shengshan Huiying Venture Capital Investment LLP. ("Suzhou Shengshan") [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 5.15% |  | 5.41% |  |  | 5.15% |  |  |  |  |  | 5.41%
DTAP [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  | 49.00% |  |  |  |  | 49.00% |  |  |  |  |  |
JKSY [Member] | Suzhou Shengshan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  |  |  |  |  |  |  |  |  | 8.13% |  |  |  |  |  |  |  |
Percentage of interest held |  |  |  |  |  |  |  |  |  |  | 4.57% |  |  |  |  |  |  |  |  |
ZR Guofu [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity interest withdrawn | 77.18% | 77.18% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration | $ 60,578 | ¥ 421,730 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage Of Interest In Partnership |  |  |  |  |  |  |  |  | 73.93% |  |  |  |  | 73.93% |  |  |  |  |  |
Partners' Capital Account, Contributions |  |  |  |  |  |  |  |  |  | ¥ 746,001 |  |  |  |  |  |  |  |  |  |
ZR Guofu [Member] | Guofu Huimei Investment Management Limited Partnership [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partners' Capital Account, Contributions |  |  |  |  |  |  | ¥ 746,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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