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Revenue, Other Income And Other Gain - Disclosure of Revenue Recognition from Performance Obligation (Detail) - HKD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Revenue Recognition from Performance Obligation [Line Items]    
Asset management $ 630,962 $ 46,640,036
Capital market solutions [Member]    
Disclosure of Revenue Recognition from Performance Obligation [Line Items]    
Asset management $ 630,962 $ 46,640,036