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Revenue, Other Income And Other Gain - Summary of timing of revenue recognition (Detail) - HKD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | $ 825,184,760 | $ 680,477,636 | $ 607,263,125
Capital market solutions [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 581,932,693 | 680,477,636 | 607,263,125
Investment Banking [member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 581,932,693 |  |
Digital solutions and other services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 183,572,996 |  |
Fashion and luxury media advertising and marketing services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 59,679,071 |  |
Services transferred at a point in time |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 601,540,924 |  |
Services transferred at a point in time | Capital market solutions [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers |  | 623,008,452 | 200,058,634
Services transferred at a point in time | Investment Banking [member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 565,141,610 |  |
Services transferred at a point in time | Digital solutions and other services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 8,145,147 |  |
Services transferred at a point in time | Fashion and luxury media advertising and marketing services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 28,254,167 |  |
Services transferred over time |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 223,643,836 |  |
Services transferred over time | Capital market solutions [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers |  | $ 57,469,184 | $ 407,204,491
Services transferred over time | Investment Banking [member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 16,791,083 |  |
Services transferred over time | Digital solutions and other services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | 175,427,849 |  |
Services transferred over time | Fashion and luxury media advertising and marketing services [Member] |  |  |
Disclosure Of Timing Of Revenue Recognition [Line Items] |  |  |
Revenue from contracts with customers | $ 31,424,904 |  |

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_114&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2022-03-24 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2022-en-r&anchor=para_113_a&doctype=Standard -URIDate 2022-03-24 + Details
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