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Summary of significant accounting policies (Detail Textuals)
12 Months Ended
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Accounting Policies [Line Items]      
Sales $ 3,369,258 $ 2,081,084  
Operating expenses 3,370,857 1,926,310  
Net income (Loss) 4,234 154,774  
Cash maintained with People's Republic of China of which no deposits are covered by insurance $ 4,918,183 $ 2,590,539  
Exchange rates (per RMB1) 0.1456 0.1503  
Applicable VAT rate 13% or 17    
Tax Rate 12% or 16    
Shipping and handling      
Accounting Policies [Line Items]      
Shipping and handling expenses $ 307,374 $ 104,560 $ 57,621
Average      
Accounting Policies [Line Items]      
Exchange rates (per RMB1) 0.1530 0.1468 0.1531