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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 lives of property and equipment |
Leasehold improvements | Shorter of the useful lives or the lease term
Building and land use rights | 20-40 years
Machinery and equipment | 10-15 years
Furniture and office equipment | 5 years
Motor vehicles | 5 years
Leasehold improvements | Shorter of the useful lives or the lease term
Machinery and equipment | 3 years
Furniture and office equipment | 3 years
Motor vehicles | 3 years
Schedule of estimated useful lives of intangible assets |
Software copyrights | 20 years
Other software | 5 years

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