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Organization and Principal Activities (Details) - Schedule of consolidated statements of comprehensive income/(loss) - Variable Interest Entity [Member] - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Condensed Income Statements, Captions [Line Items]      
Net revenues ¥ 897,035 ¥ 1,447,899 ¥ 1,424,234
Net income/(loss) ¥ (283,829) ¥ (121,363) ¥ 53,755