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Payables to Former Subsidiaries, Net (Tables)
9 Months Ended
Sep. 30, 2020
Payables to Former Subsidiaries [Abstract]  
Schedule of payables to a former subsidiaries, net

   December 31,   September 30, 
   2019   2020 
BAK Tianjin   $-   $44,762 
Shenzhen BAK   -    - 
BAK Shenzhen    1,483,352    1,631,571 
   $1,483,352   $1,676,333