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Accounts Receivable, net - Summary (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Accounts receivable ¥ 217,131 ¥ 280,911
Less: allowance for credit losses (77,723) (83,383)
Accounts receivable, net 139,408 197,528
Advertisement agent services    
Accounts receivable ¥ 90,100 ¥ 158,100
Minimum    
Terms of accounts receivable 90 days  
Maximum    
Terms of accounts receivable 270 days