This photo taken yesterday shows a business carriage of trains designed to run on Beijing’s new airport subway line, which links the Beijing Daxing International Airport and Caoqiao subway station in the downtown. The trains, which made their debut yesterday, are capable of fully automated driverless operation and a designed speed of 160 kilometers per hour, making them the fastest subway trains in China. The new subway trains are expected to start trial operation in September this year, when the airport is due to open. China News Service