Shanxi Great Wall Micro-light Equipment Co., Ltd. is the largest enterprise in China in terms of scale and export volume of optical fiber products. It has 681 employees, including 8% of the total number of engineers and technicians in the technical center. It has a Taiyuan municipal technical center. The company is mainly engaged in the research, production and sales of optical fiber panels, optical fiber inverters, light cones and other optical fiber components. It is the only high-tech enterprise in China that produces high-spec fiber optic panels, inverters and light cones. One of the world's three major optical fiber producers. The company passed ISO9001-2008 international quality system certification in 2000. Its products are exported to the Netherlands, France, India, the United States and other places. It is a national high-tech enterprise and successfully listed in Hong Kong on May 18, 2004. The first company registered in China for overseas listing.