Building materials can be divided into structural materials, decorative materials, and certain specialized materials. Structural materials include wood, bamboo, stone, cement, concrete, metal, bricks and tiles, ceramics, glass, engineering plastics, composite materials, etc.; Decorative materials include all kinds of paints, paints, coatings, veneers, various color tiles, glass with special effects, etc.; Special materials refer to those used for waterproof, moisture-proof, anti-corrosion, fireproof, flame-retardant, sound insulation, heat insulation, heat preservation, sealing, etc.