Technology import and export; construction engineering investigation (projects that must be approved according to law and can only carry out business activities with the approval of relevant departments) General projects: retail of auto parts; wholesale of auto parts; sales of building materials; technical services, technical development, technical consultation, technology exchange, technology transfer, technology promotion; information technology consulting services; metal materials sales; new material technology research and development Cellulose fiber raw materials and fiber manufacturing; synthetic fiber manufacturing; high-performance fiber and composite materials manufacturing; high-performance fiber and composite materials sales; knitted fabric sales; Internet sales (except for goods that require permission)