Chengdu is an important high-tech industrial base, trade logistics center and comprehensive transportation hub of our country, and it is also an important central city in the western region. Undoubtedly, the subway will become one of the main ways for Chengdu citizens to travel. Its 1st Line, Chengdu Metro Line 1, was officially opened on September 27, 2010. It is also the first subway line in the Midwest and has become the tenth city in mainland China with urban rail transit. The Phase 2, Phase 3 of Line 3 and Line 10 of Chengdu Metro have been built. As of April 2018, the daily maximum passenger volume of Chengdu Metro is 3.8 million passengers. Rays Tech is fortunate to be a supplier to ensure passenger safety inspection during the operation of Chengdu Metro, and to do a good job in the construction and service of security inspection and security system for Chengdu Metro, and to provide the best safe travel protection for Chengdu citizens.