R&D, manufacturing, and processing of automobile bulbs, motorcycle bulbs, LED lighting fixtures (except plastic products), halogen lamps, quartz tubes, quartz products, and electric light sources; sales of hardware products, instruments, electric light source materials, mechanical equipment and accessories, and metal materials; self-operated and agency import and export business of various commodities and technologies, except for commodities and technologies that are restricted by the state or prohibited from import and export.