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Variable Interest Entity (Details Textual)	Dec. 04, 2017	Jun. 08, 2017
Shanxi Xifeng Investment Co., Ltd. [Member]
Variable Interest Entity (Textual)
Percentage of equity interest	4.0625%
Shanghai Dianniu [Member] | Minimum [Member]
Variable Interest Entity (Textual)
Percentage of equity interest		89.20%
Shanghai Dianniu [Member] | Maximum [Member]
Variable Interest Entity (Textual)
Percentage of equity interest		93.20%

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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