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Revenue, Other Income And Other Gain - Additional Information (Detail) - HKD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Government grants | $ 1,184,000 | $ 0 | $ 3,061,665
Other interest income | 51,304,121 |  |
Other gains losses | 153,487,985 | 0 | $ 0
Gain recognized on bargain purchase transaction | 37,966,405 |  |
Gain loss on disposal of subsidiaries one | 115,521,580 |  |
Consideration receivable on disposal of subsidiaries | 350,000,000 | $ 0 |
Accounts receivable in subsidiary or businesses acquired or disposed | 200,036,799 |  |
Other assets in subsidiary or businesses acquired or disposed | 598,415,823 |  |
Accounts payable in subsidiary or businesses acquired or disposed | 690,228,623 |  |
Subsidiaries [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Cash and cash equivalents and other net assets in the subsidiary disposed | 248,235,650 |  |
Cash and cash equivalents in subsidiary disposed | 144,050,060 |  |
Independent Third Party [Member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Other interest income | $ 45,272,261 |  |

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