General items: domestic trade agent; trade broker; sales agent; sales of daily glass products; sales of technical glass products; import and export of goods; import and export agency; sales of optical glass; sales of glass fiber and products; sales of glass instruments; sales of metal materials; Sales of plastic products; sales of new metal functional materials; sales of daily necessities; sales of metal wire ropes and their products; retail of hardware products; sales of paper products; sales of daily necessities (except for licensed businesses, which can be independently operated in accordance with the law and are not prohibited or restricted by laws and regulations) project)