Research and development of household appliances; manufacturing of household appliances; manufacturing of electronic components; sales of household appliances; sales of household appliance spare parts; sales of refrigeration and air-conditioning equipment; manufacturing of refrigeration and air-conditioning equipment; sales of electronic products; wholesale of hardware products; retail of hardware products; sales of electrical accessories; research and development of hardware products; manufacturing of electrical equipment; industrial design services; daily appliance repair; household appliance installation services; engineering management services; engineering Technical services (except planning and management, survey, design, and supervision); Internet of Things application services; road freight transportation station operations; domestic freight transportation agencies; Internet of Things technical services; technical services, technology development, technical consultation, technology exchange, technology transfer, and technology promotion; network technology services; information technology consulting service licensing projects: Internet cultural operations; radio and television program production and operations; second-class value-added telecommunications business