Export trade, also known as export trade, refers to the export of domestic produced or processed goods to overseas markets.

Transportation is an engineering field that studies the layout and construction of railway, highway, waterway and air transportation infrastructure, the use of vehicles, traffic information engineering and control, and traffic operation and management.

Health education refers to the education of imparting health science knowledge and cultivating public health habits.

High rise buildings refer to those artificial buildings with multi-level and large height, which are used for production, operation and residence.

Mining refers to the extraction of naturally occurring minerals such as solids (such as coal and minerals), liquids (such as crude oil) or gases (such as natural gas).

Coal, oil, natural gas, nuclear fuel, water energy, ocean energy, wind energy, solar energy, biomass energy and other primary energy are converted into electric energy by power generation facilities, and then supplied to users as energy industrial departments through power transmission, transformation and distribution systems.

Petrochemical industry is a kind of energy and raw materials industry which uses petroleum and natural gas as raw materials to produce petroleum products such as gasoline, kerosene, diesel oil, lubricating oil, basic organic chemical raw materials, three major synthetic materials (synthetic resin, synthetic fiber, synthetic rubber) and other petrochemical products.