Introduction: Soshin Electric Co., Ltd. was founded in 1944 and is committed to the research and manufacturing of communication infrastructure products and other communication technologies. In mobile communication technology, couplers, balance converters, and ferrite filters that only extract the signals required for mutual communication are applied to base stations such as mobile phones. In addition, the use of cutting-edge ceramic materials in laminated dielectric filters jointly developed with Nippon Denko Corporation contributes to the miniaturization and high performance of communication terminal devices such as mobile phones and mobile computers. The products of Shuangxin Motors are widely used in the fields of industrial equipment and information communication.