Qing Yan Su

Chengdu Changtong Hongyuan Technology Co., Ltd. engages in the development and production of rail transit locomotive and rolling stock electronic control equipment, train operation safety monitoring products, locomotive & rolling stock accessories, and mechanical equipment. Its products include locomotive high voltage insulation detection subsystems, angle plug door closed monitoring modules, safety protection devices for train tail, electric locomotive roof insulation detection devices, high voltage transformers, high voltage isolation switches, universal train pipe penetration judging devices, locomotive unit air conditioners, and data dump devices. The company was founded on February 27, 2001 and is headquartered in Chengdu, China.

Part of Teijin Ltd., Teijin Automotive Technologies (Tangshan) is a Chinese company with 50+ years of experience in the composites industry and 100+ years in the materials business. The company is based in Tangshan, China. The company offers an unmatched level of expertise. The company was founded in 2015. The CEO is Han Ben Sun. Teijin Automotive Technologies (Tangshan was acquired by Teijin (China) Investment Co., Ltd. from Qingdao Victall Railway Co., Ltd. on December 31, 2020 for $47.22 million.