BJL14 West is the first open section. It opened on May 5, 2013. This section covers 12.4 km from ZhangGuoZhuang station to XiJu station with 7 stations. They are XiJu station, QiLiZhuang station, DaJing station, GuoZhuangZi station, DaWaYao station, Garden Expo station and ZhuangGuoZhuang station from east to west. ZhangGuoZhuang station and Garden Expo station are ground stations. It interchanges with BJL10 and BJL9 at XiJu station and QiLiZhuang station respectively. BJL14 serves the west Fengtai district, facilitates the development of Fengtai high-tech park, makes convenience for ChangXingDian area of Fengtai district to travel, and mitigates road transport pressure of southwest region. Garden Expo station service the 9th International Garden Expo directly. BJL14 East opened for trial operation on December 28, 2014. It covers 14.8 km with 12 stations connecting CBD and large residential areas. From north to south, the stations are ShanGeZhuang station, LaiGuangYing station, DongHuQu station, WangJing station, FuTong station, WangJing South station, GaoJiaYuan station (Trains pass without stop), JiangTai station, DongFengBeiQiao station, ZaoYing station, ChaoYang Park station (Trains pass without stop) and JinTai station. It interchanges with BJL15 at WangJing station and interchanges with BJL6 at JinTai station. BJL14 Middle section opened for trial operation on December 26, 2015. It covers 11.6 km with 11 stations connecting DaWangLu business district, FangZhuang and PuHuangYu residential areas and Beijing South Railway station. 9 out of the 11 stations were opened for service. These opened stations are DaWangLu station, JiuLongShan station, BeiGongDa XiMen station, ShiLiHe station, FangZhuang station, PuHuangYu station, JingTai station, YongDingMenWai station and Beijing South Railway station. It interchanges with BJL1 at DaWangLu station, BJL7 at JiuLongShan station, BJL10 at ShiLiHe station, BJL5 at PuHuangYu station and BJL4 at Beijing South Railway station.