Recycling of waste materials, technology development, service, transfer and consultation of environmental equipment and materials; International trade; Import and export of proprietary and agent goods and technologies; Commodity information consultation; Metal materials and products, mineral products, chemical raw materials and products, carbon products, mechanical and electrical products, electronic products, mechanical equipment and accessories, electronic products and accessories, instrumentation equipment, wujinjiaodian, ventilation equipment, daily necessities, household appliances, office supplies, jewelry, building decoration materials, metallurgical materials, refractory materials, wholesale and retail of industrial lubricating oil and base oil.