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Income taxes (Details Narrative) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Effective Income Tax Rate Reconciliation [Line Items]      
Effective Income Tax Rate Reconciliation, GILTI, Amount $ 0   $ 0
Goodwill 3,034,110   3,034,110
Valuation allowance 20,157 $ 64,145  
US Tax Authorities [Member]      
Effective Income Tax Rate Reconciliation [Line Items]      
Prepaid taxes 16,687   31,496
Chinese Tax Authorities [Member]      
Effective Income Tax Rate Reconciliation [Line Items]      
Prepaid taxes 285,964   $ 276,158
GILTI [Member]      
Effective Income Tax Rate Reconciliation [Line Items]      
Goodwill $ 6,094,144