The business scope includes the production and sales of oil exploitation pipes, oil and gas transmission pipes and seamless steel pipes (production can only be carried out after passing the environmental protection acceptance); General cargo handling and warehousing services; Self support and agency of the import and export business of various commodities and technologies (except for the commodities and technologies that the state restricts enterprises to operate or prohibits the import and export). (for projects subject to approval according to law, business activities can be carried out only after approval by relevant departments) general projects: Synthetic fiber manufacturing; Sales of chemical products (excluding licensed chemical products) (except for projects subject to approval according to law, carry out business activities independently by virtue of business license according to law)