Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Guui Station is a station on the Seoul Subway Line 2. Because of its proximity to the Gwangjin District Office, it is also known as Gwangjin-gu Office Station. Seoul Subway Line 2 is a circular line of the Seoul Metropolitan Subway. The line running clockwise is called the "inner circle line" and the counter-clockwise line is called the "outer circle line." This is Seoul's most heavily used line, and the longest circular subway line in the world.