line . ▁On ▁ 1 3 ▁May ▁ 1 9 1 6 , ▁the ▁M its ui ▁M ining ▁Railway ▁( called ▁G ae che on ▁Light ▁Railway ▁after ▁ 1 9 2 7 ) ▁opened ▁the ▁narrow ▁gauge ▁G ae che on ▁Line ▁from ▁Sin an ju ▁to ▁G ae che on , ▁Sent ets u ▁opened ▁the ▁Bak che on ▁Line ▁from ▁Ma eng j ung ni ▁to ▁Bak che on ▁on ▁ 1 0 ▁December ▁ 1 9 2 6 , ▁on ▁ 2 7 ▁September ▁ 1 9 3 9 ▁the ▁P ye ong bu k ▁Railway ▁opened ▁its ▁line ▁from ▁Je ong ju ▁to ▁Che ong su ▁and ▁Sup ung , ▁where ▁the ▁Sup ung ▁Dam ▁was ▁built ; ▁the ▁Emperor ▁of ▁Man ch u ku o , ▁P uy i , ▁visited ▁the ▁Sup ung ▁Dam , ▁trav elling ▁by ▁rail ▁via ▁the ▁G ye ong ui ▁Line ▁and ▁the ▁P ye ong bu k ▁Railway . ▁On ▁ 3 1 ▁October ▁ 1 9 3 9 ▁the ▁Das ado ▁Railway ▁opened ▁its ▁S inu iju – S outh ▁S inu iju ▁Inter lock ing – Y ang si – D as ado ▁Port ▁line , ▁and ▁on ▁ 2 9 ▁October ▁ 1 9 4 0 , ▁extended ▁it ▁from ▁Yang si ▁south ▁to ▁Nam si , ▁connecting ▁it ▁to ▁the ▁G ye ong ui ▁Line ▁there , ▁too . ▁This ▁resulted ▁in ▁a ▁shorter ▁route ▁than ▁the ▁original ▁main line ▁between ▁South ▁S inu iju