Research and development of mechanical equipment; Manufacturing and sales: Mechanical equipment, electronic products (excluding radio transmitting equipment) and robots; Software development, information system integration services, information technology consulting services, data processing and storage services, integrated circuit design, network engineering; Industrial project investment, agricultural project investment, real estate development and management; Import and export of goods and technologies (except those prohibited by the state or involving administrative examination and approval); Sales: Building materials, Wujinjiaodian, mineral products, agricultural and livestock products (except tobacco wholesale), medical equipment; Production and sales: Masks. (All the above business projects except hazardous chemicals) (Projects that need to be approved according to law can only be carried out after being approved by relevant departments)