Petrochemical industry is the fundamental and pillar industry of the national economy, and its development speed and scale have a direct impact on various aspects of the social economy. The chemical industry is characterized by a wide range of categories, complex processes, diverse products, and a large number of pollutants discharged during production, with high toxicity.

The chemical industry plays an important role in the national economy of various countries and is a fundamental and pillar industry in many countries. The development speed and scale of the chemical industry have a direct impact on various sectors of the social economy, with the world's annual output value of chemical products exceeding 150 billion US dollars.

The power plant industry is a factory that converts various primary energy sources stored in nature into electrical energy (secondary energy). At the end of the 19th century, with the growth of electricity demand, people began to propose the idea of establishing an electricity production center.

The pharmaceutical industry is an important component of China's national economy, which combines traditional and modern industries and integrates the first, second, and third industries. Its main categories include: chemical raw materials and preparations, Chinese medicinal materials, Chinese herbal pieces, traditional Chinese patent medicines and simple preparations, antibiotics, and biological products.

The metallurgical industry refers to the industrial sector that mines, selects, sinters metal ores, and processes them into metallic materials.

Natural gas is stored in underground porous rock formations, including oilfield gas, gas field gas, coalbed methane, mud volcanic gas, and biogenic gas, with a small amount also originating from coal seams. It is a high-quality fuel and chemical raw material.