Tongyang Inc. manufactures and sells ready-mixed concrete materials. It manufactures and distributes construction materials, such as ready-mixed concrete and aggregates; and distributes construction materials, including ready-mixed concrete, steel reinforcement, thermal insulation materials, tiles, sanitary wares, and plaster boards. The company is also involved in housing construction projects for apartments, high-end residential facilities, and town houses; civil engineering activities, including the development of traffic facilities, such as roads and harbors, as well as living facilities; construction of building, shopping complexes, and residences; and remodeling services for commercial real estate and apartments. In addition, it engages in designing, equipment supply, construction, and operation of cement plants, power plants, iron works, and chemical plants. The company was formerly known as Tongyang Major Corporation and changed its name to Tongyang Inc. in March 2011. Tongyang Inc. was founded in 1955 and is headquartered in Seoul, South Korea.