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Deferred Tax Liability, Net (Details) - USD ($) | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Summary of deferred tax liability |  |
Deferred tax asset - current (accrual of employee social insurance) | $ 186,779 | $ 189,617
Deferred tax liability - current (net investment in sales-type leases) | (1,639,057) | (1,520,537)
Deferred tax liability, net of current deferred tax asset | (1,452,278) | (1,330,920)
Deferred tax asset - noncurrent (depreciation of fixed assets) | 6,176,064 | 7,675,645
Deferred tax asset - noncurrent (asset impairment loss) | 15,003,497 | 450,706
Deferred tax asset - noncurrent (capitalized interest on CIP) | 2,531,120 | 2,574,749
Deferred tax asset---noncurrent (interest income in sales-type leases) | 658,307 |
Deferred tax asset---noncurrent | 3,114,083 | 14,321,617
Less: valuation allowance on deferred tax assets | (21,353,059) | (14,321,617)
Deferred tax assets --- noncurrent, net | 7,747,873 | 10,701,100
Deferred tax liability - noncurrent (net investment in sales-type leases) | (9,335,941) | (11,527,594)
Deferred tax liability, net of noncurrent deferred tax assets | (1,588,068) | (826,494)
Total Deferred tax liability, noncurrent per ASU 2015-17 | (3,040,346) | (2,157,414)
PRC [Member] |  |
Summary of deferred tax liability |  |
Deferred tax asset---noncurrent | $ 1,617,861 |

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