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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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- References

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- References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(c)(2)(ii))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(g)(3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

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