Technical services, technical development, technical consultation, technical exchange, technical transfer, and technical promotion. Optical instrument manufacturing, instrument and meter manufacturing, optical glass manufacturing, optoelectronic device manufacturing, optical instrument sales, special instrument and meter sales, Beixue glass sales, Central Gong Road pipe sales: Functional and new hydraulic manufacturing, sales of special equipment for semiconductor devices, electronic component manufacturing, wholesale of electronic components. Retail of electronic components Manufacturing of electronic measuring instruments, sales of electronic measuring instruments, manufacturing of electronic special materials; Research and development of electronic-specific materials Sales of electronic special materials; Intelligent control system integration Sales of electronic products, wholesale of computer software, hardware and auxiliary equipment; Retail of computer software, hardware and auxiliary equipment; Computer system services, sales of industrial control computers and systems, manufacturing of industrial control computers and systems, manufacturing of computer software, hardware and peripheral equipment; Import and export of goods and technology