The Shanghai maglev train (SMT) or Shanghai Transrapid is a magnetic levitation train (maglev) line that operates in Shanghai, China. The line uses technology developed by Transrapid, a ThyssenKrupp and Siemens joint venture. The Shanghai maglev is the world's first commercial high-speed maglev and has a maximum cruising speed of 300 km/h (186 mph). Prior to May 2021 the cruising speed was 431 km/h (268 mph), at the time this made it the fastest train service in commercial operation.