Complex sentence: At the northern terminus of Gyeyang Station, Line 1 also connects with the AREX Line which leads to Incheon International Airport and Seoul Station; and it connects with the Suin Line which allows travelers to reach Seoul Subway Line 4 and eventually the Bundang Line.
Split into simpler sentences: At the northern terminus of Gyeyang Station it connects with the AREX Line which leads to Incheon International Airport and Seoul Station. It is also connected to the Suin Line which allows travelers to Line 4 and eventually to the Bundang Line.