Summary of Significant Accounting Policies - Schedule of Exchange Rates Used for Foreign Currency Translation (Details) - HKD [Member] |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Revenue and expenses [Member] | ||||
| Schedule of Exchange Rates Used for Foreign Currency Translation [Line Items] | ||||
| Foreign currency exchange rate, translation | 7.1828 | 7.2407 | 7.2725 | 7.202 |
| Revenue and expenses [Member] | ||||
| Schedule of Exchange Rates Used for Foreign Currency Translation [Line Items] | ||||
| Foreign currency exchange rate, translation | 7.7849 | 7.8175 | 7.7801 | 7.8172 |
| Assets and liabilities [Member] | ||||
| Schedule of Exchange Rates Used for Foreign Currency Translation [Line Items] | ||||
| Foreign currency exchange rate, translation | 7.1586 | 7.2675 | 7.1586 | 7.2675 |
| Assets and liabilities [Member] | ||||
| Schedule of Exchange Rates Used for Foreign Currency Translation [Line Items] | ||||
| Foreign currency exchange rate, translation | 7.8498 | 7.8081 | 7.8498 | 7.8081 |