The industry belongs to the science and technology promotion and application service industry, and the business scope includes: General projects: New material technology promotion services; Sales of building materials; Sales of building decoration materials; Sales of building waterproofing membrane products; Sales of construction machinery; Sales of engineering plastics and synthetic resins; Research and development of new material technology; Sales of new metal functional materials; Sales of paints (excluding hazardous chemicals); Sales of special chemical products (excluding hazardous chemicals); Sales of mechanical parts and parts; Sales of household appliances; Retail of computer hardware and software and auxiliary equipment; Sales of electronic products; Sales of knitted textiles; Sales of leather products; Wholesale of daily necessities; Clothing and apparel retail; Timber sales; Sales of office supplies; Retail of arts and crafts and collectibles (except ivory and its products); Sales of lighting fixtures; Furniture sales; Sales of machinery and equipment; Wholesale of electronic components; Sales of power electronic components; Wholesale of auto parts; Ink sales (free of hazardous chemicals).