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Short-Term Borrowings and Long-Term Borrowings (Tables)
12 Months Ended
Sep. 30, 2020
Debt Disclosure [Abstract]  
Schedule of borrowings
   As of September 30, 
   2019   2020 
Short-term borrowings  $20,486   $299,315 
Long-term borrowings   6,838    - 
Total  $27,324   $299,315