Ningxia Shenzhou Tire Co., LTD. (Specialty tire products merchants) is a wholly-owned subsidiary of Ningxia Dadi Cycle Development Co., LTD. The company was founded in 2002, covers an area of 8,000 mu, has more than 7,000 employees, total assets of 13 billion yuan. The company is China's top 500 chemical enterprises, Ningxia's top 100 enterprises ranked 32nd, Shizuishan's top 30 enterprises ranked 2nd. The main industries are tire, fertilizer, polyvinyl alcohol (PVA), high strength and high mold fiber, power plant, calcium carbide, silicon manganese, dicydiamide and cement. The company has always been guided by the innovative model of developing circular economy and comprehensive utilization of resources, and has walked out of a road of low consumption and efficient circular economy development. It is one of the largest private enterprises in Ningxia Hui Autonomous Region and a typical representative of the circular economy industry chain. In 2008, it was approved by the National Development and Reform Commission and other departments as the implementation unit of "thousand enterprises energy-saving action", in 2009, it was identified as the key development enterprise of circular economy by Ningxia Hui Autonomous Region, and in 2010, it was jointly named as "resource-saving and environment-friendly enterprise" by the Ministry of Industry and Information Technology, the Ministry of Finance and the Ministry of Science and Technology. It was named the first batch of green manufacturing system demonstration enterprises by the Department of Energy Conservation and Comprehensive Utilization of the Ministry of Industry and Information Technology.