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ORGANIZATION AND BASIS OF PRESENTATION - Schedule of Operations and Cash Flows Results of Variable Interest (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Organization Consolidation And Presentation Of Financial Statements |  |  |  |
Revenues | ¥ 7,047,461 | $ 992,614 | ¥ 8,180,107 | ¥ 9,060,784
Net loss | (2,176,340) | (306,530) | (2,658,184) | (1,588,712)
Net cash used in operating activities | (169,070) | (23,813) | 188,974 | (708,869)
Net cash used in investing activities | (673,186) | (94,816) | (32,865) | (421,623)
Net cash generated from financing activities | (227,852) | (32,092) | (1,152,146) | 2,212,487
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |
Organization Consolidation And Presentation Of Financial Statements |  |  |  |
Revenues | 4,599,721 | 647,857 | 5,571,837 | 7,972,143
Net loss | (2,110,022) | (297,190) | (2,211,057) | (1,556,904)
Net cash used in operating activities | (286,575) | (40,363) | (144,977) | (958,748)
Net cash used in investing activities | (1,833,636) | (258,262) | (1,167,374) | (843,586)
Net cash generated from financing activities | ¥ 1,809,799 | $ 254,905 | ¥ 567,592 | ¥ 2,612,563

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