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Business Combinations - Additional Information (Details) - CNY (¥)
12 Months Ended
Feb. 29, 2020
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about business combination [line items]      
Percentage of equity interests acquired 100.00%    
Percentage of third party equity interests acquired 38.40%    
Business acquisition of ordinary shares issued 4,856,273    
Issuance of ordinary shares ¥ 284,000,000,000    
Revenue   ¥ 31,885,000  
Profit (loss)   3,362,000  
Business acquisition of revenue   162,881,000  
Business acquisition of profit (loss)   16,572,000  
Goodwill recognised as part of acquisition 237,225,000    
Goodwill recognised expected deductible for tax purposes 0    
Trade receivables 671,000    
Financial assets included in prepayments, other receivables and other assets 10,064,000    
Other receivables of expected uncollectable ¥ 218,000    
Acquisition of transaction cost included in administrative expenses in profit or loss   ¥ 934,000 ¥ 320,000
Lung Yu And He Yu [Member]      
Disclosure of detailed information about business combination [line items]      
Percentage of equity interests acquired 61.60%