The three technical methods of air separation are adsorption method, membrane separation method, and low temperature method. Low temperature air separation technology is the most widely used air separation technology in industry.

Helium is a noble gases with stable chemical properties and low boiling point. It is widely used in aerospace industry, nuclear industry, scientific research, petrochemical, refrigeration, medical treatment and optoelectronic product production. It is a basic material for the development of national security and high-tech industries and a strategic resource.Helium is a rare resource. As an extension of the company's natural gas business, Helium extraction is committed to the collection, capture, enrichment, purification and liquefaction of noble gases, especially helium.

As a universally recognized clean energy, hydrogen energy plays an increasingly important role in the world's energy transformation, and represents the direction of future energy development and technological change.The company is committed to clean energy technology development and engineering services. The hydrogen business has been included in the company's key strategic business section.