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Accounts Receivable - Summary of aging analysis of accounts receivable (Detail) - HKD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure Of Aging Anaylsis Of Accounts Receivable [Line Items] |  |
Accounts receivable | $ 187,673,616 | $ 86,514,680
Current [member] |  |
Disclosure Of Aging Anaylsis Of Accounts Receivable [Line Items] |  |
Accounts receivable | 177,754,160 | 74,048,058
Within 1 month [member] |  |
Disclosure Of Aging Anaylsis Of Accounts Receivable [Line Items] |  |
Accounts receivable | 7,270,723 | 53,633
1 to 3 months [member] |  |
Disclosure Of Aging Anaylsis Of Accounts Receivable [Line Items] |  |
Accounts receivable | 1,545,263 | 5,165,947
Over 3 months [member] |  |
Disclosure Of Aging Anaylsis Of Accounts Receivable [Line Items] |  |
Accounts receivable | $ 1,103,470 | $ 7,247,042

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