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Variable interest entity (Details - VIE operations) - USD ($)
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Revenue $ 66,142,779 $ 86,071,485
Variable Interest Entity, Primary Beneficiary [Member]    
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]    
Revenue 0 0
Net loss after elimination of intercompany transactions $ 1,231,686 $ 4,340,968