Accrued expenses and other payables (Details) - USD ($)	Dec. 31, 2025	Sep. 30, 2025
Payables and Accruals [Abstract]
Accrued professional expenses	$ 92,037	$ 160,445
Accrued salary expenses	230,530	190,384
Loan to a third party	71,136
Other payables and accrued expenses	17,808	11,906
Total accrued expenses and other payables	$ 411,511	$ 362,735