Photo taken on Sept. 6, 2015 shows a night view of Lhasa City, capital of southwest China's Tibet Autonomous Region. Lhasa, one of the highest cities in the world, has a history of more than 1,300 years. (Xinhua/Chen Yehua)

Photo taken on Sept. 6, 2015 shows a night view of Lhasa City, capital of southwest China's Tibet Autonomous Region. Lhasa, one of the highest cities in the world, has a history of more than 1,300 years. (Xinhua/Chen Yehua)