China Railway Construction Heavy Industry Corp Ltd is a China-based company mainly engaged in the design, research and development, manufacturing, sales, leasing and service of tunnel boring machine equipment, rail transit equipment and special professional equipment. The Company conducts business through three segments. The Tunnel Boring Machine segment produces earth pressure balance shield machines, slurry balance shield machines and other products, which are used in the fields of excavation, driving, support and integrated construction of tunnels and lanes and others. The Rail Transit Equipment segment produces products including railway turnouts, spring clip fasteners and others, which are used in the construction of high-speed railways and conventional railways. The Special Professional Equipment segment produces tunnel drilling and blasting construction equipment and tunnel cold excavation equipment, which are used in railways, highways and other fields.