Plastic product processing and sales; printing of packaging and decoration items; sales of rubber and plastic products, paper products, sewing machines, garments, and accessories; production and sales of labor protection products; manufacturing and sales of automotive parts and accessories, metal processing machinery; processing and sales of engineering equipment and accessories; sales of environmental protection equipment, metallurgical equipment, and oil machinery accessories; and independent and agency import and export of various commodities and technologies, except for those goods and technologies that are restricted or prohibited from import and export by laws and regulations.