Material physics, material chemistry, inorganic non-engineering, introduction to materials, etc. College material chemistry starts from the last semester of junior year, focusing on understanding, supplemented by calculation, and focusing on memory. The specialized courses in junior year include: material physics, material chemistry, inorganic non-engineering, introduction to materials, chemical engineering principles, powder engineering, etc. The main training system of material chemistry grasps the basic theory and technology of material chemistry and has the basic knowledge and skills related to material chemistry.