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Cash And Bank Balances And Restricted Cash (Tables)
 12 Months Ended
Dec. 31, 2022
Cash and cash equivalents [abstract]  
Summary of detailed information about cash and bank balances
 
(a)
Cash and cash equivalents
 
    
As of December 31,
  
    
2021
     
2022
  
    
HK$
     
HK$
  
Cash and cash equivalents:
                  
—Cash on hand
      595,992        1,497  
—General bank accounts
      525,610,116        1,078,409,838  
    
 
 
     
 
 
  
Total cash and cash equivalents
      526,206,108        1,078,411,335