Import and export of goods; Technology import and export. (For projects subject to approval according to law, business activities can only be carried out upon approval of relevant departments. Specific business projects shall be subject to approval documents or license of relevant departments. ) General projects: Mechanical equipment research and development; Machinery and equipment sales; Mechanical and electrical equipment manufacturing [branch management]; Motor manufacturing [branch operation]; Machinery parts, parts processing [branch operation]; Sales of machinery parts and spare parts; Electronic measuring instrument manufacturing [branch management]; Sales of electronic measuring instruments; Sales of electronic products; Office equipment consumables manufacturing [branch management]; Office equipment consumables sales; Special equipment manufacturing (excluding licensed professional equipment manufacturing) [branch operation]; General mechanical equipment installation services; Domestic trade agent; Software sales; Software development; Wholesale of computer hardware, software and auxiliary equipment; Optical communication equipment sales; Sales of special equipment for semiconductor devices; Industrial automatic control system device sales; Industrial automatic control system device manufacturing [branch operation]; High speed precision gear transmission device sales; High speed precision heavy duty bearing sales; Sales of metal products; Metal tool sales; Industrial control computer and system sales; Gas compression machinery sales; Hardware wholesale; Hardware retail; Lubricating oil sales; Machinery and equipment leasing; Information system integration services; Technical service, technology development, technology consultation, technology exchange, technology transfer, technology popularization. (Except for the items subject to approval according to law, independently carry out business activities according to law with the business license)