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Deferred Tax Liability, Net (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Non-current deferred tax assets |  |
Accrued expenses | $ 189,050 | $ 186,779
Interest income in sales-type leases on cash basis | 853,265 | 658,307
Depreciation of fixed assets | 2,938,605 | 6,176,064
Assets impairment loss | 7,537,556 | 15,003,497
Capitalized interest on CIP |  | 2,531,120
US NOL | 3,246,655 | 3,114,083
PRC NOL | 10,424,558 | 1,617,861
Non-current deferred tax liabilities |  |
Net investment in sales-type leases | (6,685,021) | (10,974,998)
Net non-current deferred tax assets | 18,504,668 | 18,312,713
Less: valuation allowance on deferred tax assets | (18,504,668) | (21,353,059)
Non-current deferred tax liabilities, net |  | $ (3,040,346)

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