Schedule of related party transactions (Details) - USD ($)	3 Months Ended	9 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Related Party Transaction [Line Items]
Interest income/(expense)	$ 5,538	$ (116)	$ 12,810	$ 986
B E Y E B E [Member]
Related Party Transaction [Line Items]
Interest income/(expense)	4,610	(116)	10,829	986
S Z B E Y E B E [Member]
Related Party Transaction [Line Items]
Fixed fee license revenue	70,500	70,500	211,500	211,500
Royalty revenue			29,399	34,796
Rental expense	4,404	4,179	13,008	12,550
Weihong Du [Member]
Related Party Transaction [Line Items]
Payroll expense	7,500	37,500	22,500	52,500
Liou Xie [Member]
Related Party Transaction [Line Items]
Payroll expense	23,120	21,947	69,320	65,653
Liumei Li [Member]
Related Party Transaction [Line Items]
Payroll expense	$ 9,000		$ 27,000

The element represents rental expense.

No definition available.

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- Definition

The element represents royalty revenue recieved.

+ References

No definition available.

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- Definition

Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. Other employee benefit expense includes, but is not limited to, service component of net periodic benefit cost for defined benefit plan. Excludes compensation cost in cost of good and service sold.

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- Definition

Amount of interest expense classified as operating and nonoperating. Includes, but is not limited to, cost of borrowing accounted for as interest expense.

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- Definition

Cash received from licensees for license fees during the current period.

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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.

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