Tibet, known as the "third pole of the earth", has an average altitude of more than 4000 meters. It covers a total area of more than 1.2 million square kilometers, and is dotted with lakes and snow capped mountains. On the route from Lhasa to Ali, overlooking the earth, you can feel different Tibet from a "sky perspective", and the scenery is very beautiful. (Picture/text: Liu Xiaodong, Zhao Lang, reporter of China News Network)