The Extension of Island line to Western District (previously known as West Island line) is a three-station western extension of the Hong Kong MTR's Island line. Construction of the line began on 10 August 2009, and the two westernmost stations on line opened on 28 December 2014; the intermediary Sai Ying Pun station opened on 29 March 2015. The first train went into service that day at 6:00 a.m. Hong Kong time.