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Finance Costs - Schedule of finance costs (Detail) - HKD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finance Costs [Abstract]
Interests on margin loans payable	$ 0	$ 0	$ 12,475,296
Interests on convertible bond	430,702	8,085,419	7,717,348
Interests on bank borrowings	6,298,576	4,740,504	1,317,435
Total Finance costs	$ 6,729,278	$ 12,825,923	$ 21,510,079

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- Definition

Finance costs [Abstract].

+ References

No definition available.

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- Definition

The amount of interest expense on margin loans.

+ References

No definition available.

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- Definition

The amount of interest expense on bank borrowings.

+ References

No definition available.

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- Definition

The amount of costs associated with financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 82
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- Definition

The amount of interest expense on bonds issued. [Refer: Interest expense; Bonds issued]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard
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