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Related Party Disclosures - Summary of Transactions Between Related Parties Amount (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Transactions Between Related Parties [Line Items]      
Interest income on net investments in subleases ¥ 45 ¥ 49 ¥ 103
Acquisition of a subsidiary   284,000  
Shareholder of the Company      
Disclosure Of Transactions Between Related Parties [Line Items]      
Acquisition of a subsidiary 174,944    
BMF Culture      
Disclosure Of Transactions Between Related Parties [Line Items]      
Interest income on net investments in subleases   ¥ 23 ¥ 85
Revenue from a related party 349    
Naxos [Member]      
Disclosure Of Transactions Between Related Parties [Line Items]      
Copyright expenses ¥ 7,743