Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Changdu Bangda Airport (IATA: BPX, ICAO: ZUBD), also known as Qamdo Bamda Airport, is an airport serving Qamdo (Changdu), Tibet Autonomous Region, China. It is located in the village of Bamda (Bangda).
Background
At an elevation of 4,334 m (14,219 ft) above sea level, Qamdo Airport was formerly the highest airport in the world. It was surpassed by Daocheng Yading Airport, with an elevation of 4,411 m (14,472 ft), on 16 September 2013. It has a very long runway, 4.5 km (2.8 mi), a necessary feature to accommodate the reduced engine and lift performance that affect aircraft at high altitude, requiring higher than normal takeoff speeds and therefore longer takeoff and landing runs.
Runway repairs took place in 2007 and 2013 after decay from the weather. A new 4,500-metre-long (14,800 ft) runway was built, and the original 5,500-metre-long (18,000 ft) runway was closed.
BPXLocation of airport in Tibet
CR Major railways
Airports