Xi'an Electronic Engineering Research Institute (西安电子工程研究所, also known as No. 206 Research Institute of China Ordnance Industries, 中国兵器工业集团第二○六研究所) is an engineering research institute. It specializes in electronic engineering technologies such as fire-control radar, electronic warfare, millimeter-wave communication, automatic control, signal processing, computer science, radio metrology, electronic structure, and high-precision transmission structure.