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FAIR VALUE MEASUREMENTS - Additional Information (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥)
FAIR VALUE MEASUREMENTS |  |  |
Impairment charge, long-lived assets | ¥ 16,148 | $ 2,341 | ¥ 16,148
Nonrecurring |  |  |
FAIR VALUE MEASUREMENTS |  |  |
Impairment charge, long-lived assets | ¥ 0 |  | ¥ 0
Significant unobservable inputs (Level 3) | Measurement Input, Discount Rate |  |  |
FAIR VALUE MEASUREMENTS |  |  |
Long lived assets measurement input | 17.8 | 17.8 |

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