 Also on December 19, 1966, a branch from Jeongsan to Gohan opened as the Gohan Line, which would also become part of the future Taebaek Line.The Jeongseon Line was completed to Jeongseon on January 20, 1967; this section and its later extensions form the present-day Jeongseon Line.The long gap between the Gohan and Hwangji branch lines was plugged on October 16, 1973, when the entire railway from Jecheon to the junction with the Yeongdong Line at Baeksan was renamed the Taebaek Line.