A-type corrugated and B-type corrugated are generally used for transporting outer packing boxes, and beer boxes are generally made of B-shaped corrugated boxes. E楞 is mostly used as a single-piece packaging box with certain aesthetic requirements and appropriate weight content. F-type corrugated and G-type corrugated are collectively referred to as miniature corrugated, and are extremely thin corrugated, used as hamburgers, cream fillings and other foods. Disposable packaging containers, or used as packaging for digital cameras, portable audio systems and other microelectronics products and refrigeration products.