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Significant Accounting Policies - Summary of Advertising Business Exceeding (Details) - Major customers for advertising business - Customer concentration risk
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Customer A    
Advertising and promotional service providers    
Total percentage of the Group's advertising and promotional expenses that were paid to these service providers who accounted for 10% or more of the Group's advertising and promotional service expenses 71.60% 87.30%
Customer B    
Advertising and promotional service providers    
Total percentage of the Group's advertising and promotional expenses that were paid to these service providers who accounted for 10% or more of the Group's advertising and promotional service expenses 27.80%