Pupo LineThe Pup'o Line is a non-electrified standard-gauge secondary railway line of the Korean State Railway in Kangryŏng-gun, South [Hwanghae Province], North Korea, running from Sin'gangryŏng on the Ongjin Line to Pup'o.HistoryThe line was opened by the Korean State Railway in the 1970s.RouteA yellow background in the "Distance" box indicates that section of the line is not electrified.