Xingtai Xianfeng Ultrasonic Electronic Co., Ltd., formerly known as Xingtai Xianfeng Ultrasonic Electronic Research Institute, was established by Zhang Liming in December 1999, aiming at research and development of railway rail ultrasonic flaw detector, and has successively developed GCT-2 rail ultrasonic flaw detector, GCT-8 digital steel rail ultrasonic flaw detector, flaw detector recorder, etc., providing multiple types of rail detection equipment for railway users. Xingtai Xianfeng Ultrasound Electronic Co., Ltd. was established in April 2003 to increase income and produce research and development. Since then, it has become a joint-stock private enterprise integrating R&D, production and sales. In 2011, it was identified as a high-tech enterprise in Hebei Province, passed ISO9001 quality management system certification in 2012, and was identified as a specialized, special and new small and medium-sized enterprise in Hebei Province in 2022.