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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Summary of Significant Accounting Policies [Abstract] |
Schedule of estimated useful life |
|  | Useful Life |  | Estimated Residual Value
Office equipment and furnishing |  | 3-5 years |  | 5%
Leasehold improvements |  | Shorter of the remaining lease terms or estimated useful lives |  | -

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