The coal and electricity section of the bidding network shows that Shanxi Coking Coal Xishan Coal and Electricity (Group) Co., Ltd. (referred to as Xishan Coal and Electricity) is the core subsidiary of Shanxi Coking Coal Group, the largest coking coal production base in China, and the first batch of circular economy pilot units in China. Its predecessor was Xishan Mining Bureau established in 1956, and its headquarters was located at the foot of Xishan Mountain in Taiyuan City. There are 209 subsidiaries, including Shanxi Xishan Coal and Electricity Co., Ltd., which was listed on Shenzhen Stock Exchange in 2000. Xishan coal and electricity industry is distributed in 4 provinces (cities), 9 cities and more than 20 counties, involving coal, electricity, coking, building materials, logistics trade, catering services and other fields.