Beijing Railway System is inspired by the Chinese character "中", which is the character for the word "China" itself. The railways are placed around the center of 6 ring roads, which are Beijing's distinctive feature. 
 
City Map is a tourist-optimized version of this map series and includes not only railway map but also other useful information such as area map and other transportation information. 
 
시티맵은 노선도 디자인이 가장 최적화된 맵시리즈로 노선도 뿐만 아니라 여행에 필요한 정보, 지도 등이 집약된 가이드입니다.