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Payables to Former Subsidiaries, Net (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Payables to former subsidiaries, net $ 626,990 $ 1,483,352
BAK Tianjin [Member]    
Payables to former subsidiaries, net 29,852
BAK Shenzhen [Member]    
Payables to former subsidiaries, net $ 597,139 $ 1,483,352