v3.26.1
Summary of significant accounting policies (Details Narrative)
1 Months Ended 6 Months Ended
Apr. 30, 2019
May 31, 2018
Apr. 30, 2018
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Contract liabilities, current       $ 484,862   $ 602,721
Average exchange rates       7.0061 7.2308  
Cash       $ 72,485    
Cumulative impairment for long-term investments       7,400,000   200,000
Impairment loss of investments       7,000,000.0    
Cash maintained with people's republic of china       $ 35,356   $ 30,502
Exchange rates (per RMB1)       6.8980   7.1190
UNITED STATES [Member]            
Cash       $ 213,896   $ 772,975
Deposit Insurance Regulation [Member]            
Cash       72,485    
Minimum            
Applicable vat rate percentage 9.00% 12.00% 13.00%      
Maximum            
Applicable vat rate percentage 13.00% 16.00% 17.00%      
Shipping and handling            
Shipping and handling expenses       $ 1,405 $ 47,352