Alstom Metropolis is a metro trainset by Alstom. The trains are in service in 22 major cities around the world, representing more than 3000 cars, including Singapore, Shanghai, Budapest, Warsaw, Nanjing, Buenos Aires, São Paulo, Lima, Santiago, Chile, Barcelona, Istanbul, Santo Domingo, Chennai and Kochi. Amsterdam ordered 23 Metropolis trains; the first one came into operation June 2013. Xiamen also ordered some Metropolis trainsets for the Xiamen Metro. Trains can be run in configurations of 2 to 10 cars using manned or unmanned operations.