All matter is composed of atoms, and chemistry is the science of studying atom-atom interaction, which includes quantum chemistry, computational chemistry, semiconductor and optoelectronics, detection and quick screening platform, PM2.5 and atmospheric chemistry, life science and medical materials, novel materials and nanotechnology, drug synthesis and design, environmental marine geosciences, food science and food safety, green energy and batteries, agriculture, animal husbandry and breeding. There are many types of chemical-related industries. In addition to traditional petrochemical, pharmaceutical, paper, cosmetics, polymer plastics, high-tech industries such as high-efficiency batteries, semiconductors, liquid crystal screens, diodes, luminescent materials, biochips, nanoparticles, and high-performance are also closely related to chemistry, liquid crystal screens, diodes, luminescent materials, biochips, nanoparticles.