The sub center of Beijing is located in Lucheng Town, Tongzhou District. It is not only a major measure to adjust and optimize the urban spatial pattern of Beijing, but also a landmark project to ease the non capital functions and promote the coordinated development of Beijing, Tianjin and Hebei. The main task is to strengthen the functions of the capital's core functional area as a political center, a cultural center and an international communication center, as well as a bearing area for the functions of the political and cultural center and an exhibition area for the charm of a famous historical and cultural city. Beijing Sub Center project is the first time that elemental sulfur is included in the technical requirements of rubber and plastic products in China. At the same time, it is also paid special attention by the national environmental protection department. All indicators of Shenzhou group meet the national environmental protection requirements, and finally becomes the only designated supplier of Beijing sub center project.