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. Its products include wireless train dispatch; urban mass transit; digital radio plane shunting systems, including locomotive controller, shunting area master radio, and remote-control terminal; and ground communication system. It serves defense construction, railway construction, and other customers. The company was founded in 1936 and is based in Tianjin, China. TianJin 712 Communication & Broadcasting Co., Ltd. is a subsidiary of Tianjin Zhonghuan Electronic and Information (Group) Co., Ltd.