v3.25.4

Lease (Details) | 12 Months Ended
--- | ---
Sep. 30, 2025 HKD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 HKD ($) | Sep. 30, 2023 HKD ($)
Lease [Abstract] |  |  |  |
Finance lease’s weighted average remaining lease term | 11 months 15 days | 11 months 15 days | 1 year 2 months 1 day |
Finance lease, weighted average discount rate | 4.73% | 4.73% | 4.73% |
Lease agreement | 1 year | 1 year |  |
Lease expense | $ 38,400 |  |  |
Short-term lease cost |  |  | $ 173,797 | $ 460,800

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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