In regard to imported timbers in Yunnan, except world famous timbers, the high quality timbers that have been utilized broadly abroad , but have been described incompletely or even not recorded in China are selecte d in the list.

It concludes that the import of steel mainly consists of high-level products for structural supplement and the negative effect is on the enterprises engaged in steel production, but the negative effect is seen in China s growing dependence on the import of the iron ores, the scarce resource to China, which increases the potential risk to the nation.

Mutation analysis of China’s import timber in requirement and quantity