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Payables to Former Subsidiaries, net (Tables) | 9 Months Ended
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Sep. 30, 2021
Receivables From Former Subsidiaries [Abstract] |
Schedule of payables to a former subsidiaries, net |
|  | December 31, |  |  | September 30, |
|  | 2020 |  |  | 2021 |
BAK Tianjin |  | $ | 29,852 |  |  | $ | 7,970 |
BAK Shenzhen |  |  | 597,138 |  |  |  | 353,904 |
|  | $ | 626,990 |  |  | $ | 361,874 |

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