Engaged in technical development, technical consultation and technical service in the field of instrumentation; Instrumentation. Electrical equipment, electronic products, communication equipment (excluding satellite radio and TELEVISION ground receiver facilities), refrigeration equipment, environmental protection equipment, household articles, water pipes and valves, Wujinjiadian, sports and sports articles, computers, software and auxiliary equipment (except computer information system security products), fitness equipment. Mechanical and electrical equipment and accessories, wood and products, building materials. Daily provisions; Craft gift sales; Installation and maintenance of mechanical and electrical equipment (except special equipment).