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chemical materials are the material basis for human survival and development. they are generally divided into metal materials, inorganic non-metallic materials, organic synthetic materials, and composite materials. advanced materials are the basis for the development of high-end equipment manufacturing industry. machinery, aerospace, rail transportation, shipbuilding, automobile, chemical industry, electronics, new energy, construction, national defense and other fields use a large number of new materials. with the rise and development of new chinese industry, breakthroughs have been made in the development of special metal materials, polymer and its composite materials, engineering ceramic materials, cemented carbide and powder metallurgy materials, and degradable materials. the demand for research and testing, analysis and development, and quality control of chemical materials is also increasing day by day.