大興区
The Daxing Line of the Beijing Subway () is a rapid transit line that connects the southern Daxing District of the city with the subway network. It extends Line 4 south from its southern terminus at Gongyixiqiao, on the 4th Ring Road in Fengtai District, to Tian'gongyuan, beyond the 6th Ring Road in Daxing District. The Daxing Line is about in length with underground. Daxing line contains 12 stations and is about . Initially, the Daxing line was planned to have 4 ground stations. However, due to lack of space, only Xihongmen was built above the surface. Full-scale construction began in 2007 and the line was opened on 30 December 2010, 14:00 local time.