Zhengzhou Coal Mining Machinery Group Company Limited is a leading comprehensive coal mining and excavating equipment manufacturer in the PRC in terms of total sales revenue of coal mining and excavating equipment, according to the China National Coal Mining Machinery Industry Association (the “CMIA”). The Group focuses on the manufacturing and sale of hydraulic roof supports, and it was the largest hydraulic roof support manufacturer in the PRC, with approximately 22.6% of the PRC market share for hydraulic roof supports based on production volume in 2011, according to the CMIA.