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Deferred Tax Liability, Net (Details) - USD ($) | Jun. 30, 2017 | Dec. 31, 2016
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Summary of deferred tax liability |  |
Deferred tax asset - current (accrual of employee social insurance) | $ 172,012 | $ 167,980
Deferred tax liability - current (net investment in sales-type leases) | (1,746,046) | (1,586,058)
Deferred tax liability, net of current deferred tax asset | (1,574,034) | (1,418,078)
Deferred tax asset - noncurrent (depreciation of fixed assets) | 17,496,549 | 17,943,843
Deferred tax liability - noncurrent (net investment in sales-type leases) | (25,156,102) | (25,426,744)
Deferred tax liability, net of noncurrent deferred tax asset | (7,659,553) | (7,482,901)
Total Deferred tax liability, noncurrent per ASU 2015-17 | $ 9,233,587 | $ 8,900,979

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