Taipei Metro is a metro system in Taipei, Taiwan. It consists of 108 stations (117 stations if transfer stations are double-counted) and 5 main routes and 2 branch lines, operating on 131.1 kilometres (81.5 mi) of revenue track. The Taipei Metro is a first metro system in Taiwan before the Taoyuan Metro's Airport Express link opened in March 2017 to connect the Taipei Taoyuan Airport and the main station.