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Accounts Receivable - Summary of trade receivables (Detail) - HKD ($)
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Trade Receivables [Line Items]    
Accounts receivable $ 187,673,616 $ 86,514,680
Receivable From Capital Market Solutions Services [Member]    
Disclosure Of Trade Receivables [Line Items]    
Accounts receivable 81,614,733 $ 86,514,680
Commission receivable from insurance brokerage [Member]    
Disclosure Of Trade Receivables [Line Items]    
Accounts receivable 2,718,150  
Receivable From Digital Solution And Services    
Disclosure Of Trade Receivables [Line Items]    
Accounts receivable 81,844,175  
Receivable From Fashion And Luxury Media Advertising And Marketing Services    
Disclosure Of Trade Receivables [Line Items]    
Accounts receivable $ 21,496,558