As a new type of prefabricated house, the expansion box mobile house consists of a standard 20 foot main box that can be unfolded from both ends,The total area of the box has increased by more than three times compared to the original individual area. The total area after expansion is approximately 581 square feet. Not only does it provide.Spacious and comfortable indoor space not only reduces housing costs, but also greatly lowers transportation costs, making it a new type of convenience Mobile homes.