Containers can be divided into three types according to the structure, there are fixed containers, folding containers, thin shell containers. In the fixed container can also be divided into closed container, open top container, plate frame container, etc. Collapsible container refers to the main components of the container (side wall, end wall and box top) can be simply folded or decomposed, and can be easily combined when used again; The thin-shell container is composed of all components into a steel body, which has the advantage of light weight and can adapt to the torque without causing deformation.