Technical services, technology development, technical consultation, technology exchange, technology transfer, technology promotion; sales of metal structures; manufacturing of metal structures; sales of mechanical parts and components; processing of mechanical parts and components; mold manufacturing; sales of molds; sales of pneumatic power machinery and components; manufacturing of pneumatic power machinery and components; sales of pharmaceutical special equipment; manufacturing of special pharmaceutical equipment; manufacturing of special equipment for food, wine, beverages and tea production; manufacturing of special equipment for commerce, catering, and services; commercial, Sales of special equipment for catering and services; manufacturing of power electronic components; sales of power electronic components; maintenance of electronic and mechanical equipment (excluding special equipment); professional design services; manufacturing of power transmission, distribution and control equipment; sales of intelligent power transmission, distribution and control equipment; repair of general equipment; repair of special equipment; repair of electrical equipment; manufacturing of ovens, furnaces and electric furnaces; sales of ovens, furnaces and electric furnaces; manufacturing of motorcycle spare parts; wholesale of motorcycles and spare parts; import and export of goods; import and export of technology.