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LONG-TERM INVESTMENTS (Schedule of Equity Method Investments) (Details) - CNY (¥) ¥ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Xi'an JiangyuanAndike Ltd |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity interest in equity method investment | 29.70% | 29.70%
Equity Method Investments, Fair Value Disclosure | ¥ 12,468 | ¥ 11,161
Suzhou Shengshan Huiying Venture Capital Investment LLP. ("Suzhou Shengshan") |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity interest in equity method investment | 5.15% | 5.15%
Equity Method Investments, Fair Value Disclosure | ¥ 11,051 | ¥ 9,904
Zhejiang Marine Leasing Ltd |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity interest in equity method investment | 20.00% | 20.00%
Equity Method Investments, Fair Value Disclosure | ¥ 167,044 | ¥ 166,870
Guangdong Hengjian Proton Medical Industry Co. Ltd |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity interest in equity method investment | 14.20% | 0.00%
Equity Method Investments, Fair Value Disclosure | ¥ 86,493 | ¥ 0

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