Core Insights - The chairman of the National Energy Group's Wuhai Energy, Zhou Yong, is under investigation for serious violations of discipline and law [1] - Wuhai Energy is a wholly-owned subsidiary of the National Energy Group, specializing in coking coal production and processing, with additional operations in gas and photovoltaic power generation [1] Company Overview - Wuhai Energy was established in 1958, evolving from the Uda Mining Bureau and Haibowan Mining Bureau under the Ministry of Coal [2] - The company underwent several restructurings, including a merger in 2008 and a name change in 2019 to National Energy Group Wuhai Energy Co., Ltd. [2] Operational Details - Wuhai Energy is located in Inner Mongolia and is the largest coking coal production base in the region, with a total mining capacity of 15 million tons and a washing capacity of 19.3 million tons [1] - The company operates 10 mines, with 6 production mines and various other types of mines, primarily producing coking coal, main coking coal, high-sulfur fertilizer coal, and electricity coal [1]