v3.26.1
Credit facilities (Details) - USD ($)
 6 Months Ended 12 Months Ended
Mar. 31, 2026
Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]    
Short term loans banks $ 2,458,684 $ 2,254,530
long-term bank loans $ 668,241 $ 762,547
Bank Of China [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.00% 3.10%
Short term loans banks $ 724,847 $ 702,345
Bank Of China 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.00% 3.10%
Short term loans banks $ 434,909 $ 421,408
Bankof Chengdu [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.20% 3.60%
Short term loans banks $ 724,848 $ 153,111
long-term bank loans $ 405,915 $ 561,877
Industrialand Commercial Bankof China [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.10% 3.10%
Short term loans banks $ 501,595 $ 486,023
Industrialand Commercial Bankof China 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.10% 3.10%
Short term loans banks $ 72,485 $ 70,235
Bankof Chengdu 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate   3.60%
Short term loans banks   $ 421,408
Weizhong Bank [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 10.44% 10.44%
long-term bank loans $ 124,260 $ 200,670
Weizhong Bank 1 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 10.99%  
long-term bank loans $ 138,066  
Bankof Chengdu 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest rate 3.20% 4.00%