Schedule of net inventories (Details) |
Sep. 30, 2025
USD ($)
|
Sep. 30, 2025
HKD ($)
|
Sep. 30, 2024
HKD ($)
|
|---|---|---|---|
| Inventory Disclosure [Abstract] | |||
| Spare parts and other materials | $ 3,455,213 | $ 3,539,223 | |
| Work-in-progress | 22,315,068 | 44,074,158 | |
| Inventory, Net | $ 3,311,099 | $ 25,770,281 | $ 47,613,381 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|