TONGYANG, Inc. engages in the provision of construction and building materials. It operates through the following divisions: Construction Material, Construction, Plant, and Fabric. The Construction Material division provides ready mixed concrete to be delivered construction sites. The Construction division offers buildings, roads, ports, and other construction services. The Plant division provides engineering, procurement, and construction services of power plants. The Fabric division offers span bond and acrylic yarns. The company was founded on August 25, 1955 and is headquartered in Seoul, South Korea.