The Anpō Line, which connected to the Renkyō Line at Fengtian (Hōten) and was initially built as a 762 mm narrow-gauge line, was converted to standard gauge in November 1911, and from 15 June 1912 direct operation between Busan and Changchun began, via the Chosen Government Railway's Gyeongbu and Gyeongui Lines, the Anpō Line, and the Renkyō Line from Fengtian to Changchun.