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Staff Costs - Schedule of staff costs (Detail) - HKD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Classes of employee benefits expense [abstract]      
Salaries, bonuses and staff welfare $ 121,314,816 $ 94,776,416 $ 93,660,617
Pension scheme contributions (defined contribution schemes) 7,942,657 809,482 749,664
Employee benefits expense $ 129,257,473 $ 95,585,898 $ 94,410,281