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COMMITMENTS AND CONTINGENCIES (Details) ¥ in Thousands, $ in Thousands | Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥)
--- | --- | --- | ---
Long-term Purchase Commitment [Line Items] |  |  |
Unrecognized tax positions | ¥ 75,348 | $ 11,825 |
Capital Addition Purchase Commitments [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Commitments to Acquire Certain Medical Equipment | ¥ 257,165 | $ 40,355 | ¥ 480,290

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