The materials of outdoor furniture in the courtyard are: PS imitation wood tables and chairs, PE imitation rattan tables and chairs, solid wood furniture, aluminum alloy tables and chairs, cast aluminum furniture, Teslinbu tables and chairs, woven sofa and so on. Outdoor furniture with good materials is made of rattan-like tables and chairs and cast aluminum furniture in Xinningju, as well as wood-like tables and chairs. These materials all have the characteristics of sun protection and waterproof. At that time, the only thing that didn't work at that time couldn't be fireproof. Cast aluminum furniture is relatively better among the materials.