Tong Yang Industry Co., Ltd. engages in the manufacture and sale of parts, components, and models for automobiles and motorcycles in Taiwan, China, the United States, and internationally. The company operates through two segments, Assembly Market and Maintenance Market. It offers plastics products, including bumper covers, grills, and instrument panels; sheet metal products, such as fenders and hoods; and active grille shutters and cooling fan assemblies. The company is also involved in the production and sale of steam locomotive parts; process and trading of paint materials and fine chemical raw materials; design, manufacture, maintenance, and trading of tooling molds; production and sale of pollution prevention equipment, as well as varnished water and other varnishes based on natural polymers. In addition, it provides product design, technology development, experimental testing, leasing, and service management services. The company was founded in 1952 and is headquartered in Tainan City, Taiwan.