Metal mesh, chemical fiber mesh, plastic products (excluding medical plastic products, excluding disposable foamed plastic products and ultra-thin plastic bags), chemical fiber products, metal products, rubber products, machinery and equipment and accessories, printing equipment and accessories, papermaking equipment and Sales of accessories, self-management and agency for the import and export business of various commodities and technologies (the import and export business of licensed products and technologies must be approved by the national special dealer before operating the products and technologies that are restricted by the state or prohibited from import and export. ) (Projects that are subject to approval in accordance with the law can only be carried out after approval by relevant departments)