Photo taken on March 18, 2018 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. Lhasa saw a snowfall from Saturday to Sunday.(Xinhua/Jigme Dorje)

Photo taken on March 18, 2018 shows the snow-covered Lhasa City, southwest China's Tibet Autonomous Region. Lhasa saw a snowfall from Saturday to Sunday.(Xinhua/Jigme Dorje)

Photo taken on March 18, 2018 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. Lhasa saw a snowfall from Saturday to Sunday.(Xinhua/Jigme Dorje)

Photo taken on March 18, 2018 shows the Potala Palace after a snowfall in Lhasa, southwest China's Tibet Autonomous Region. Lhasa saw a snowfall from Saturday to Sunday.(Xinhua/Jigme Dorje)