Big data services; digital technology services; Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; Industrial automatic control system device manufacturing; R&D of distribution switch control equipment; Distribution switch control equipment manufacturing; Distribution switch control equipment sales; Intelligent instrumentation manufacturing; Intelligent instrumentation sales; sales of electrical equipment; Wholesale of hardware products; hardware product retail; Optical cable sales; Wholesale of electronic components; Retail of electronic components; electronic product sales; Power electronic components manufacturing; sales of power electronic components; sales of metal materials; Processing of mechanical parts and parts; sales of refrigeration and air conditioning equipment; sales of special equipment for environmental protection; sales of communication equipment; import and export of goods; technology import and export; Import and export agent.