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v3.21.2

Non-marketable equity securities (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Apr. 21, 2021 USD ($) | Apr. 21, 2021 CNY (¥) | Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jul. 20, 2021
Non-marketable equity securities (Details) [Line Items] |  |  |  |  |  |
Percentage of Acquired equity interests |  |  | 81.56% | 81.56% |  | 81.56%
Impairment of non-marketable securities |  |  | $ 690,542 | $ 690,542 |  |
CBAK Power [Member] |  |  |  |  |  |
Non-marketable equity securities (Details) [Line Items] |  |  |  |  |  |
Cash paid | $ 1,390,000 | ¥ 9,000,000 |  |  |  |
Percentage of Acquired equity interests | 9.74% | 9.74% |  |  |  |

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