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Credit facilities (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items] |  |
Short term loans banks | $ 2,487,357 | $ 1,859,610
Bankof China [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 3.10% | 3.45%
Short term loans banks | $ 689,019 | $ 427,497
Bankof China 1 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 3.10% |
Short term loans banks | $ 413,411 |
Bankof Chengdu [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 3.60% | 4.00%
Short term loans banks | $ 150,206 | $ 155,324
Bankof Chengdu 1 [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 3.60% | 4.00%
Short term loans banks | $ 413,411 | $ 427,497
Rural Commercial Bankof China [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 4.00% | 4.00%
Short term loans banks | $ 275,607 | $ 284,998
Industrialand Commercial Bankof China [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Interest rate | 3.45% | 3.45%
Short term loans banks | $ 545,703 | $ 564,294

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- Definition Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
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