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Payables to Former Subsidiaries, Net (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Payables to former subsidiaries $ 4,301,646 $ 22,302,721
BAK Tianjin [Member]    
Payables to former subsidiaries 972,913 282,682
BAK Shenzhen [Member]    
Payables to former subsidiaries $ 3,328,733 $ 22,020,039