inception namtaeryeong station
Seoul (  )  officially the Seoul Special City  is the capital and largest metropolis of the Republic of Korea ( commonly known as South Korea ), forming the heart of the Seoul Capital Area , which includes the surrounding Incheon metropolis and Gyeonggi province , the world ' s 16th largest city . It is home to over half of all South Koreans along with ___MASK93___ , 102 international residents . Namtaeryeong Station is a station on the Seoul Subway Line ___MASK29___ . It is the southernmost station on Line ___MASK29___ that is operated by Seoul Metro . The name of this station literally means `` great southern pass , '' referring to a passageway linking Seoul and Gwacheon , between Mt . Gwanak and Mt . Umyeon . Most of the provincial railways in South Korea were built with Japanese expertise when Korea was under Japanese rule . Trains still run on the left hand side of the track on these railways . But the Seoul Subway , which was constructed much later in the 1970s , ran on the right hand track . Therefore , between Namtaeryeong and Seonbawi Stations , where the two lines connect , the underground tracks must cross over from right hand drive in Namtaeryeong to left hand drive in Seonbawi . Incheon ( formerly romanized as Inchon ; literally " kind river "), officially the Incheon Metropolitan City (  ), is a city located in northwestern South Korea , bordering Seoul and Gyeonggi to the east . Inhabited since the New Stone Age , Incheon was home to just ___MASK29___ , 700 people when it became an international port in 1883 . Today , about 3 million people live in the city , making it Korea  s third most populous city after Seoul and Busan . The city ' s growth has been assured in modern times with the development of its port due to its natural advantages as a coastal city and its proximity to the South Korean capital . It is part of the Seoul Capital Area , along with Seoul itself and Gyeonggi Province , forming the world ' s second largest metropolitan area by population . Seoul Metropolitan Rapid Transit Corporation ( SMRT ) was established in ___MASK90___ to operate the Seoul Subway lines 5 , 6 , 7 , 8 in Seoul , South Korea . Seoul Metro ( Hangul :  ) is a public corporation owned by Seoul Metropolitan Government , and one of the major operators of Seoul Metropolitan Subway with Seoul Metropolitan Rapid Transit Corporation and Korail . Korea is a historical state in East Asia , since ___MASK86___ divided into two distinct sovereign states : North Korea ( officially the " Democratic People ' s Republic of Korea ") and South Korea ( officially the " Republic of Korea "). Located on the Korean Peninsula , Korea is bordered by China to the northwest and Russia to the northeast . It is separated from Japan to the east by the Korea Strait and the East Sea . The Seoul Metropolitan Subway is an integrated urban rail transit system consisting of ___MASK36___ rapid transit , light metro , commuter rail and people mover lines located in South Korea . The system serves most of the Seoul Metropolitan Area including the Incheon metropolis and satellite cities in Gyeonggi province . Some lines in the network cross large rural areas to reach major cities in northern Chungnam province and western Gangwon province that lie over 100 km away from the capital . Seoul Subway Line ___MASK29___ ( dubbed " The Blue Line ") of the Seoul Metropolitan Subway is a long line crossing from the southwest to the northeast across the Seoul National Capital Area . This is operated by both Korail and Seoul Metro . The southern terminus ( Oido ) is in Jeongwang ___MASK29___ - dong , Siheung City , and the northern terminus ( Danggogae ) is in Sanggye ___MASK29___ - dong , Nowon - gu , northern Seoul .