Xiamen tongchuang detection technology co., Ltd.  (TCT) was founded in 2008, is a professional environmental testing equipment research and development, production, manufacturing, measurement and control system application development, and the Internet of things application solutions provider, with famous scientific research institutes and enterprises at home and abroad set up long-term win-win strategic cooperation relationship, provide for the customer in the vehicle inspection, environmental monitoring, information management, iot test, etc of a complete set of scientific system solutions, It is one of the world's few vehicle emission detection system PEMS, engine direct emission analysis system, automobile exhaust particulate analyzer, portable automobile exhaust analyzer and smoke meter and other products of key research and development enterprises.