Changsongang LineThe Changsŏn'gang Line is a non-electrified standard-gauge freight-only secondary line of the Korean State Railway in South P'yŏngan Province, North Korea, running from Ŭnsan on the P'yŏngra Line to Changsŏn'gang.RouteA yellow background in the "Distance" box indicates that section of the line is not electrified.