Various types of automobile modification, manufacturing and sales of accessories, automobile technical services, information system integration, self-operated and agent import and export business of various commodities and technologies, sales of first-class medical devices, sales of second-class medical devices, operation of third-class medical devices, software development, information system operation and maintenance services, security equipment manufacturing, security equipment sales, communication equipment manufacturing, used car distribution, conference and exhibition services (projects that require approval according to law can only be carried out with the approval of relevant departments)