Yau Ma Tei, formerly called Waterloo after Waterloo Road, is an MTR station located in Yau Ma Tei, Kowloon. It is served by the Kwun Tong Line and the Tsuen Wan Line. The station opened in 1979 and was renamed as Yau Ma Tei on 31 May 1985 along with Argyle (Mong Kok) and Chater (Central). Yau Ma Tei is an interchange station, even though the platforms are not designed for cross-platform interchange.