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Income taxes (Details Narrative) - USD ($)
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Effective Income Tax Rate Reconciliation [Line Items]    
Effective income tax rate $ 0 $ 0
Goodwill 3,034,110 3,034,110
U S Tax Authorities [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Prepaid taxes 19,073 31,496
Chinese Tax Authorities [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Prepaid taxes 280,155 $ 276,158
G I L T I [Member]    
Effective Income Tax Rate Reconciliation [Line Items]    
Goodwill $ 6,094,144