The Changsha Metro (officially 长沙轨道交通; chángshā guǐdào jiāotōng; also called 长沙地铁; chángshā dìtiě) is a rapid transit system in Changsha, which is the capital of Hunan province in China. The first metro line of it, Line 2, was opened on April 29, 2014. This made Changsha the 18th city in mainland China to open a rapid transit system.[3]