Photo taken on April 19, 2016 shows the night scene of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region. (Xinhua/Liu Dongjun)

Photo taken on April 19, 2016 shows the night scene of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region. (Xinhua/Purbu Zhaxi)