v3.26.1
Segment reporting (Details 2) - USD ($)
6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Total revenue $ 6,394,713 $ 16,144,309
PRC [Member]    
Total revenue 3,700,629 12,736,774
United States of America [Member]    
Total revenue $ 2,694,084 $ 3,407,535