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Concentrations and Credit Risk (Details 2) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Zhengzhou BAK New Energy Vehicle Co., Ltd [Member] |  |  |  |
Net purchase | $ 3,812,819 |  |  | [1]
Concentration risk, percentage of net purchase | 27.93% |  |  | [1]
Supplier A [Member] |  |  |  |
Net purchase |  | [1] | $ 3,719,739 |
Concentration risk, percentage of net purchase |  | [1] | 16.73% |
Supplier B [Member] |  |  |  |
Net purchase | $ 2,920,966 |  |  | [1]
Concentration risk, percentage of net purchase | 21.40% |  |  | [1]
[1] | Comprised less than 10% of net purchase for the respective period.

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- Details
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- Details
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