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Related party balances and transactions (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Sep. 30, 2024
Related Party Transaction [Line Items] |  |
Due to shareholders | $ 351,141 | $ 56,778
Ke Chen [Member] |  |
Related Party Transaction [Line Items] |  |
Relationship | Principal shareholder, Chief Executive Officer and director of the Company |
Nature of Transaction | Shareholder loans |
Due to shareholders | $ 62,196 | 18,424
Ni Jiang [Member] |  |
Related Party Transaction [Line Items] |  |
Relationship | Principal shareholder, chairwoman of the Company |
Nature of Transaction | Shareholder loans |
Due to shareholders | $ 288,945 | 38,354
Ke Chens [Member] |  |
Related Party Transaction [Line Items] |  |
Nature of Transaction | Lease |
Relationship | Principal shareholder, Chief Executive Officer and director of the Company |
Lease liability- a related party | $ 55,262 | $ 75,940

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