1. Packaging materials: Packaging materials are the material basis of packaging and the material bearers of packaging functions.
2. Packaging technology: Packaging technology is the key to achieve packaging protection and ensure the quality of the goods inside.
3. Packaging structure modeling: Packaging structure modeling is the specific form of packaging materials and packaging technology.
4. Surface decoration: Surface decoration is the main means to beautify, publicize and introduce products through pictures and words.