As the world economy continues to develop, people's requirements for housing are also constantly improving. In such an environment, integrated houses are becoming more and more popular with their advantages of being movable, easy to store, energy-saving and environmentally friendly, excellent in earthquake resistance, and reusable. They are truly "green buildings" and have realized the transformation of the "real estate" attribute of houses to the "movable property" attribute for thousands of years, and have realized the complete separation of the real estate and "land" of "real estate" for thousands of years.

    They are composed of structural systems, ground systems, floor systems, wall systems, and roof systems. Each system is composed of several unit modules. The unit modules are manufactured in the factory, and the house is assembled on site by the unit modules. It is also called prefabricated and assembled buildings. It is a house built by industrialized production methods. It is also a house in which some or all of the components of the building are prefabricated in the factory, and then transported to the construction site to assemble the components through reliable connection methods. In Europe, the United States and Japan.