Manufacturing of power transmission and distribution and control equipment, power electronic devices, industrial automatic control system devices, steam turbine bypass devices, compound excitation devices, wind power machinery, mining and quarrying equipment, specialized electrical machinery, specialized electronic industrial equipment, environmental pollution prevention and control special equipment, social public safety equipment and devices, traffic safety and control special equipment, railway dedicated dispatching communication equipment, station communication equipment, generators and generator sets, optical fibers, cables, cable accessories, insulation products, transformers, vehicle-specific lighting and electrical signal equipment, optical communication transmission equipment, carrier communication transmission equipment, digital transmission multiplexing and intermediate equipment, digital transmission intermediate equipment, data switching equipment, communication networks and systems, modems, computer network equipment, electrical instruments and meters, supply meters, environmental monitoring special instruments, geological exploration and seismic special instruments, electronic measuring instruments, power station thermal instruments; technology development, promotion, transfer, consulting, services, and training; computer system services; data processing; application software services; software services; software consulting; general contracting, professional contracting, and labor subcontracting; sales of power transmission and distribution and control equipment, power electronic devices, charging equipment, industrial automatic control system devices, steam turbine bypass devices, compound excitation devices, wind power machinery, mining and quarrying equipment, specialized electrical machinery, specialized electronic industrial equipment, environmental pollution prevention and control special equipment, social public safety equipment and devices, traffic safety and control special equipment, railway dedicated dispatching communication equipment, station communication equipment, generators and generator sets, optical fibers, cables, cable accessories, insulation products, transformers, vehicle-specific lighting and electrical signal equipment, optical communication transmission equipment, carrier communication transmission equipment, digital transmission multiplexing and intermediate equipment, digital transmission intermediate equipment, data switching equipment, communication networks and systems, modems, computer network equipment, electrical instruments and meters, supply meters, environmental monitoring special instruments, geological exploration and seismic special instruments, electronic measuring instruments, power station thermal instruments, computers, software and auxiliary equipment, communication equipment, electronic products, devices and components; engineering and technical research and experimental development; import and export of goods, technology, and agency; commercial franchising; rental of office premises; rental of commercial premises; leasing of specialized equipment.