Line 20 (Beijing Subway)
Line 20 of the Beijing Subway, or Line R4 is a rapid transit line under planning in Beijing.
It is a line in long-term planning. The line will connect Terminal 3 station, Xinghuo railway station, Beijing railway station and Beijing Daxing International Airport.History
In 2019, Liu Xuesong, Representative of the Beijing Municipal People's Congress and General Manager of Capital Airport Holding Company, suggested building the northern section of the line in advance. The northern section is 9.7 km from Terminal 3 station in Beijing Capital International Airport, to Guanzhuangluxikou station on under construction Line 3 and Line 12.
