Chaoyang District at (transfer to Line 5) and curls southwest after onto the Beijing-Chengde Expressway. At , Line 13 intersects with Line 15. After entering the 3rd Ring Road at , the line runs straight south, along the remnants of the eastern earthen wall to Liufang. Then, Line 13 goes underground to in Dongcheng District where transfers are available to Line 2 and the Capital Airport Express. Stations (from West to East) History Line 13 was opened in two sections: The western section between Xizhimen and Huoying was opened on September 28, 2002; the eastern section from Huoying to Dongzhimen was opened on January 28, 2003. Despite being numbered 13, the line was only the third subway line to enter into operation. It was the first Beijing Subway line to adopt Yikatong, the electronic farecard, at the end of 2003. Future Development On November 22, 2018, the Beijing Municipal Commission of Planning and Natural Resources began the 30-day public consultation of a plan to split Line 13 into two lines, temporarily named Line 13A and Line 13B. According to the plan, the existing Line 13 will be split between Xi'erqi station and Huilongguan station, to form two "L"-shaped lines intersecting in the north of the city. Passengers can use cross-platform interchange between Line 13A and Line 13B at a new station in the west of the Jingzang Expressway. Line 13A Line 13A has a total length of with 18 stations, including of new line and 13 new stations. The line will be built to support expanded 8-car Type B trains. Line 13B Line 13B has a total length of with 15 stations, including of new line and 6 new stations. The line will continue to use 6-car Type B trains. Rolling stock Current Former Notes References Beijing Subway lines Beijing Subway, Line 13 2002 establishments in China 750 V DC railway electrification