[1] By the end of 1930, the Chosen Railway (abbreviated Chōtetsu), the largest privately owned railway in colonial Korea, had extended its Hwanghae Line network to run from Sariwŏn to Sugyo in the west and to Haeju in the south, completing the latter line in December of that year.

[2] Chōtetsu then began building eastwards from Haeju to create a southern connection to the Kyŏngŭi Line, the state-owned Chosen Government Railway's (abbreviated Sentetsu) mainline from Kyŏngsŏng to Sinŭiju and Andong, Manchuria, opening the first section of a new 762 mm (30.0 in) narrow-gauge line, from East Haeju to Yŏn'an, on 21 December 1931.

[3] The second section was opened on 1 September 1932, running from Yŏn'an across the Ryesong River to connect to the Kyŏngŭi Line at Tosŏng (later renamed Kaep'ung).

[6] The Korean State Railway completed the conversion of the Haeju—Paech'ŏn line to standard gauge in 1971, at the same time adding an extension from Paech'ŏn to the current terminus, Ŭnbit.

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