Sales, design, installation, commissioning and maintenance: electrical equipment, power supply equipment, batteries, fire-fighting equipment, mechanical equipment, electromechanical products, electronic equipment, office automation equipment, generator sets, precision air conditioners, solar equipment and accessories, Wujinjiaodian, rubber products, household appliances, building materials, auto parts, office equipment and accessories, communication equipment, security equipment, medical equipment, primary agricultural products; technology development, technical consulting, technical services, and technology transfer in the computer field;