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Payables to Former Subsidiaries, net (Tables)
 6 Months Ended
Jun. 30, 2020
Payables to Former Subsidiaries [Abstract]  
Schedule of payable to a former subsidiary
   December 31,   June 30, 
   2019   2020 
BAK Tianjin  $-   $10,936 
Shenzhen BAK   -    - 
BAK Shenzhen   1,483,352    1,497,587 
   $1,483,352   $1,508,523