Ryanggang Province
Samjiyŏn Line is the name of a railway line of the Korean State Railway in Ryanggang Province, North Korea, running from Wiyŏn on the Paektusan Ch'ŏngnyŏn Line to Motka. The name is applied both to the original narrow gauge line built in 1948, as well as to the new standard gauge line opened in 2017.