In 1911, the Yalu River Railway Bridge was completed across the Yalu River between Sinŭiju and Andong (now Dandong), China, connecting the Kyŏngŭi Line to the Anfeng Line of the South Manchuria Railway.

Work to convert the Anfeng Line from 762 mm (2 ft 6.0 in) narrow gauge to standard gauge was completed at the same time, thus connecting the capitals of Korea and China with a continuous railway line via and Manchuria.

[5] Passenger service on the Kang'an Line was discontinued on 31 March 1943,[6] with general (public) freight traffic being relocated from Sinŭiju Kang'an to Sinŭiju station on 20 December of that year.

There is also a large workshop for maintenance of passenger cars at Kang'an Station.

A yellow background in the "Distance" box indicates that section of the line is not electrified.