Capital Airport–Daxing Airport intercity railway connecting line (), is a higher-speed railway line currently under construction. The speed will be 200 km/h. It will connect the Beijing Capital International Airport and Beijing Daxing International Airport when the full line is completed.
Phase 1 of the railway, which is currently under construction, will connect Langfang (a city in Hebei Province) and Beijing Daxing International Airport. Phase 1 is 39.438 km, including 15.3 km in Beijing and 24.138 km in Hebei Province. Phase 1 of the railway will be finished in 2024.
The second phase from Langfang East railway station to Huairou South railway station via Capital Airport is under planning.
Stations
Phase 1 (under construction) Phase 1 of the railway (Daxing Airport to Langfang East) is shared with the Langzhuo (Langfang–Zhuozhou) intercity railway (Chinese: 廊涿城际铁路).
Phase 2 (under planning) The Phase 2 of the railway will be replaced by New Town Link Line (S6) of Beijing Subway and the stations on the line have not announced.