Grid cloth, which is usually made of glass fiber or other synthetic fibers, has high tensile strength and flexibility, and its service life is more than 50 years. Its main function is to strengthen the structure of the wall and prevent cracks. During the drying process of wall materials, due to changes in temperature and humidity, the wall surface will shrink and expand, which can easily lead to cracks in the wall. Before painting the wall, using the grid cloth can effectively combine with the wall surface to form a strong protective layer, thereby greatly extending the service life of the wall surface.