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Financial Assets At Fair Value Through Profit Or Loss - Summary of financial assets at fair value through profit or loss (Detail) - HKD ($) | Dec. 31, 2022 | Dec. 31, 2021
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Financial assets at fair value through profit or loss [Line Items] |  |
Financial assets at fair value through profit or loss, other than financial asset at fair value through profit or loss under stock loan | $ 1,353,611,934 | $ 2,574,695,685
Financial assets at fair value through profit or loss under stock loan | 169,583,400 | 211,331,400
Financial assets | 1,523,195,334 | 2,786,027,085
Listed equity shares, at quoted price [Abstract] |  |
Listed equity shares, at quoted price | 861,455,286 | 1,055,407,260
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 558,435,363 | 1,730,619,825
Movie income rights investments | 103,304,685 | 0
Financial assets at fair value through profit or loss and stock loan | 1,523,195,334 | 2,786,027,085
Investment A [member] |  |
Listed equity shares, at quoted price [Abstract] |  |
Listed equity shares, at quoted price | 695,988,462 | 1,055,407,260
Investment B [member] |  |
Listed equity shares, at quoted price [Abstract] |  |
Listed equity shares, at quoted price | 165,462,000 | 0
Investment C [member] |  |
Listed equity shares, at quoted price [Abstract] |  |
Listed equity shares, at quoted price | 4,824 | 0
Investment D [member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 0 | 86,195,893
Investment E [member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 0 | 21,954,381
Investment F [member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 0 | 1,120,244,487
Investment G [Member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 0 | 9,979,264
Investment H [Member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 543,000,000 | 480,700,000
Investment I [Member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 11,630,000 | 11,545,800
Investment J [Member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | 1,559,597 | 0
Investment K [Member] |  |
Fair value of investments in unlisted equity shares [Abstract] |  |
Unlisted equity shares | $ 2,245,766 | $ 0

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- Definition The amount of current financial assets mandatorily measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Financial assets at fair value through profit or loss, mandatorily measured at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 8 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_8_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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