Chemical industry is the general name of enterprises and organizations engaged in the production and development of chemical industry. Chemical industry is an indispensable part of the national economy, and its development is of great practical significance to human economic and social development.

An important part of China's national economy is an industry that combines traditional industries with modern industries and integrates the first, second and third industries.

Offshore oil engineering industry is an important part of offshore oil industry. China's offshore oil engineering industry and offshore oil industry were born simultaneously.

A comprehensive engineering facility that can convert water energy into electricity. Generally, it includes reservoir, water diversion system of hydropower station, power house and electromechanical equipment formed by water retaining and discharging structures.

LNG is a kind of colorless mixture gas with low carbon content, which is rich in alkanes. After simple processing, LNG can become a green and environmental clean energy.

The industrial production department that uses agricultural and sideline products as raw materials to produce food by physical processing or yeast fermentation. Its raw materials are mainly primary products produced by agriculture, forestry, animal husbandry, fishery and sideline sectors.