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Prepaid Expenses and Other Current Assets, Net (Tables)
 12 Months Ended
Sep. 30, 2021
Other Income and Expenses [Abstract]  
Schedule of prepaid expenses and other current assets
    As of September 30, 
    2020   2021 
Prepaid construction fee(1)   $
-
   $384,425 
Prepaid exhibition fee    
-
    80,796 
Prepaid rental fee    53,784    74,288 
Prepaid IPO related expense    759,365    
-
 
Receivable from disposal of a production line    14,394    
-
 
Others    67,924    70,093 
Less: allowance for doubtful accounts    (14,394)   
-
 
Prepaid expenses and other current assets   $881,073   $609,602 

 

(1)The balance represented prepaid construction fee for plant maintenance and renovation.