What are the traditional bulk commodities included? And electromechanical products?

Oil, iron ore, copper, grain and other commodities of great importance to the national economy and people's livelihood, the volume of its flow of transactions is not generally comparable to other commodities, so it is called "bulk".

Strictly speaking, these traditional bulk commodities in the Customs import and export catalog does not have a fixed classification, or according to its own attributes, that is, the use and industry.

Electromechanical products itself is a large category in which there are many categorized sub-items.