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Parent Only Information (Details) - Schedule of condensed statements of cash flows - Parent [Member] ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2020 CNY (¥) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2018 CNY (¥)
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net cash used in operating activities | ¥ (179,963) | $ (27,581) | ¥ (69,622) |
Net cash used in investing activities |  |  |  |
Net cash provided by financing activities | 375,462 | 57,542 | 69,762 |
Reverse recapitalization | 39,162 | 6,002 |  |
Equity financing through PIPE | 336,300 | 51,540 |  |
Cash received from convertible bond |  |  | 69,762 |
Net increase in cash and cash equivalents | 177,862 | 27,259 | 140 |
Cash and cash equivalents at beginning of the year | 140 | 21 |  |
Cash and cash equivalents at end of the year | ¥ 178,002 | $ 27,280 | ¥ 140 |

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