Line 1 (Nopo-dong(노포동)~Beomnaegol(범내골)) was first opened in 1985. In 1994, the whole section (Nopo-dong(노포동)~Sinpyeong(신평)) was launched. Line 1 is the South-North route. And it passes right through the heart of the city. It was 32.5 km long with 34 stations in 1994 when the line was later extended to 40.5 km with 40 stations, which the extension was opened on April 20, 2017. The subway used in Line 1 is middle-sized subway. It was made of stainless domestically for the first time when being constructed. It is a 8-cars train. Many cutting edge technologies (including NATM, TBM construction methods) were used to construct line 1. 