Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Of Summary Of Significant Accounting Policies [Abstract]

Estimated Useful Lives of Assets

Depreciation is calculated on a straight-line basis over the estimated useful lives of the assets as follows:

►      Buildings	20-30 years
►      Building improvement	3-20 years
►      Machinery and equipment	4-20 years
►      Motor vehicles	3-10 years
►      Office equipment	2-20 years