Light weight, high strength, good toughness, large impact strength, small expansion coefficient, large plate width, few joints, smooth surface, no moisture absorption, no mildew, no cracking, cold resistance, high temperature resistance, acid and alkali resistance, flame retardance, sawability, nailability, weldability, no need to brush mold release agent, easy demoulding, convenient assembly, high turnover rate, can be processed into any length, can be recycled, and can be mixed with wood plywo