Manufacturing of specialized automotive parts and accessories; research and development, production, and sales of road maintenance machinery, special cleaning machinery, pile driving machinery, curb forming machinery, general road machinery, road marking machinery, and traffic control equipment; construction of highway engineering; self-operated and agent import and export business of various goods and technologies (excluding goods and technologies prohibited or restricted by the state). (Business involving qualifications shall be operated with qualification certificates.) Licensed items: manufacturing of road motor vehicles; manufacturing of special equipment. General items: sales of new automobiles; leasing services (excluding licensed leasing services); leasing of special equipment; manufacturing of new building materials (excluding hazardous chemicals); sales of building materials; manufacturing of specialized machinery for building materials production; manufacturing of specialized equipment (excluding licensed specialized equipment); manufacturing of general equipment (excluding special equipment); manufacturing of industrial robots; research and development of intelligent robots; sales of mechanical equipment; sales of industrial robots; sales of intelligent robots; installation and maintenance of industrial robots; manufacturing of mechanical and electrical equipment; installation services for general mechanical equipment; information system integration services; software development; industrial internet data services; big data services; internet of things technical services; manufacturing of virtual reality equipment; cloud computing equipment technical services; integration of intelligent control systems; artificial intelligence public data platforms; integration services for artificial intelligence industry applications; development of artificial intelligence application software; general cargo warehousing services (excluding items requiring permits such as hazardous chemicals).