What bus should I take from Lhasa to the airport? Where can I catch a bus?

From Xijiao Bus Terminal, you can take a taxi to China Civil Aviation, and then take the airport bus to the airport. The shuttle bus of China Civil Aviation runs every 20 minutes, and the fare is 25 pounds. It is estimated that it only takes more than 20 to take a taxi from Xijiao Passenger Station to civil aviation. Last time I took a taxi from Ge Sang Karin (also called Xijiao) to China Civil Aviation, it seemed that it cost me more than 20 yuan. I took the 8 o'clock shuttle bus at 10, and it usually takes 1 hour to get from civil aviation to the airport.