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Propery, Plants and Equipment, Net (Tables)
12 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of propery plants and equipment net
   As of September 30, 
   2020   2021 
Building  $
-
   $6,020,735 
Equipment for rental business   1,312,816    1,401,580 
Production line for e-bicycles   1,118,521    1,267,954 
leasehold improvement   
-
    541,096 
Furniture, fixtures and office equipment   44,869    127,957 
Vehicles   29,121    120,879 
Property, plants and equipment   2,505,327    9,480,201 
Less: accumulated depreciation   (135,436)   (733,815)
Property, plants and equipment, net  $2,369,891   $8,746,386