Expansion box is an innovative residential solution that combines the portability of containers with the flexibility of modular buildings, allowing for quick expansion and folding to adapt to different usage scenarios and needs. The following is a detailed introduction about the expansion box.

The expansion box adopts light steel material as the frame , usually using galvanized square tubes and galvanized angle irons, which have good anti corrosion performance and strength. The wall is made of composite steel plates and filled with insulation materials such as EPS or rock wool to achieve good insulation effect. This design makes the expansion box not only sturdy and durable , but also has good insulation performance.