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Parent Only Information (Details) - Schedule of condensed statements of operations and comprehensive loss - Parent [Member] ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
Condensed Income Statements, Captions [Line Items] |  |  |  |
Loss from operations | ¥ (42,702) | $ (6,544) | ¥ (11,110) |
Loss from investment in subsidiaries | (445,790) | (68,320) | (780,040) | (429,592)
Net loss | (488,492) | (74,864) | (791,150) | (429,592)
Other comprehensive loss | 5,668 | 869 | 91 | (629)
Total Comprehensive loss | ¥ (482,824) | $ (73,995) | ¥ (791,059) | ¥ (430,221)

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