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Summary of changes in share capital (Details) - HKD ($)
 12 Months Ended
Apr. 30, 2024
Apr. 16, 2024
Dec. 31, 2024
Beginning balance, Number of shares     10,000
Beginning balance, Share capital     $ 10
Issue of ordinary shares, Number of shares 765,000 29,835,000 30,600,000
Issue of ordinary shares, Share capital     $ 119,340
Shares repurchase     (15,610,000)
Shares repurchase, Share capital     $ (60,850)
Ending balance, Number of shares     15,000,000
Ending balance, Share capital     $ 58,500