The petroleum industry is an industrial sector that involves the extraction of petroleum (including natural petroleum, oil shale, and natural gas) and its processing and refining. It consists of units such as oilfield geological exploration, oilfield development, oil extraction, transportation, and refining and processing. Petroleum is the "blood" of industry and an important industrial energy source.

The power industry is an industrial sector that converts various types of primary energy into electrical energy through power generation facilities and then transmits the electricity to end users. It is an important foundational industry of the national economy.

The metallurgical industry refers to the sector that utilizes the physical and chemical properties of metals, through processes such as smelting, refining, and processing, to transform metal ores or metal waste into metal products with specific properties and usage value.

The pharmaceutical industry refers to the sector that involves drug research and development, production, sales, and after-sales services. It covers various fields such as chemical pharmaceuticals, biopharmaceuticals, and traditional Chinese medicine, and plays a crucial role in safeguarding human health and improving the quality of life.

The chemical industry refers to all enterprises and units engaged in the production and development of chemical industries. It encompasses three major categories: petrochemicals, basic chemicals, and chemical fibers. Among them, basic chemicals are further divided into nine subcategories such as fertilizers, organic products, inorganic products, and chlor-alkali. This industry permeates various fields and is an indispensable and important component of the national economy. Its development is of great significance to the economic and social development of mankind.

New energy, also known as unconventional energy, refers to various energy forms other than traditional energy. It includes energy sources that have just been put into use or are currently being actively researched and promoted, such as solar energy, geothermal energy, wind energy, ocean energy, biomass energy, and nuclear fusion energy, etc.

Natural gas is a clean and efficient fossil energy source, with methane as its main component. The natural gas industry encompasses the entire chain from the exploration, development, production, purification, storage, transportation, sale and utilization of natural gas. It holds an important position in the global energy structure and its significance is increasingly prominent as the requirements for environmental protection and energy cleanliness continue to rise.

Water treatment engineering involves purifying, softening, disinfecting, removing iron and manganese from water that does not meet the standards. It also includes removing heavy metal ions and filtering. This is a project that uses physical and chemical methods to remove certain substances from water that are not necessary for production and daily life. It is a project for water treatment that involves sedimentation, filtration, coagulation, flocculation, corrosion inhibition, and scale prevention, etc., to adjust the water quality for specific purposes.