土瓜灣
This station is located geographically closer to Ma Tau Chung than To Kwa Wan. This raised controversy when "To Kwa Wan" was originally chosen to name this station and "Ma Tau Wai" for the adjacent station, which is in To Kwa Wan, during planning and construction. In a map of the MTR network after 2021, revealed to the public on 23 September 2017, the station name was changed to that of the nearby landmark Sung Wong Toi, an important historic relic of Song Dynasty Emperor Duanzong. However, MTR Corporation stated that the name was "for internal reference" and that no final decision would be made until 2018.