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Payables to Former Subsidiaries, Net (Tables)
12 Months Ended
Dec. 31, 2020
Payables to Former Subsidiaries [Abstract]  
Schedule of payables to a former subsidiaries, net

   December 31,   December 31, 
   2019   2020 
BAK Tianjin  $-   $29,852 
BAK Shenzhen   1,483,352    597,138 
   $1,483,352   $626,990