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Payables to Former Subsidiaries (Tables)
3 Months Ended
Mar. 31, 2020
Payables To Former Subsidiaries  
Schedule of payable to a former subsidiary

 

   December 31,   March 31, 
   2019   2020 
BAK Tianjin  $-   $10,288 
BAK Shenzhen    1,483,352    1,394,391 
Shenzhen BAK (note 1)   -    4,279,722 
    1,483,352    5,684,401