TianJin 712 Communication & Broadcasting Co., Ltd. engages in the research and development, production, and sale of tactical radio, airborne station, railway communication radio, and other communication equipment in China and internationally. Its products include aeronautical radio; wireless train dispatch; urban mass; digital radio plane shunting, including locomotive controller, shunting area master radio, and remote-control terminal; shunting locomotive controller; wireless shunting system; and ground communication system. The company also engages in the investment management; and manufacture and sale of special and electronic equipment. It serves defense construction, railway construction, and other customers. The company was founded in 1936 and is based in Tianjin, China.