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COMMITMENTS AND CONTINGENCIES (Narrative) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Long-term Purchase Commitment [Line Items]      
Unrecognized tax positions $ 14,758 ¥ 102,740  
Capital Addition Purchase Commitments [Member]      
Long-term Purchase Commitment [Line Items]      
Commitments to Acquire Certain Medical Equipment $ 89,429 ¥ 622,584 ¥ 660,758