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Deferred Tax, Net (Details) - Schedule of deferred tax liability - USD ($) | Jun. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Non-current deferred tax assets |  |  |
Accrued expenses | $ 70,721 | $ 70,019 | $ 189,050
Interest income in sales-type leases on cash basis |  |  | 853,265
Depreciation of fixed assets |  |  | 2,938,605
Assets impairment loss |  |  | 7,537,556
Write-off Erdos TCH net investment in sales-type leases | 6,536,960 | 6,155,300 | 6,349,604
US NOL | 533,834 | 254,035 | 3,246,655
PRC NOL |  | 10,849,690 | 10,424,558
Non-current deferred tax liabilities |  |  |
Net investment in sales-type leases |  |  | (6,685,021)
Net non-current deferred tax assets | 17,784,382 | 17,329,044 | 24,854,272
Less: valuation allowance for deferred tax assets | (17,784,382) | (17,329,044) | (24,854,272)
Non-current deferred tax assets, net |  |  |

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