[InKunming--Yunnan] Photo taken on March 15, 2018 shows the Napa Lake Nature Reserve in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 15, 2018 shows the Napa Lake Nature Reserve in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 12, 2018 shows the Meili snow mountains in Deqin County of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 17, 2018 shows the scenery after a snowfall in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 16, 2018 shows the sunrise scenery at Songzanlin Monastery in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 17, 2018 shows the scenery after a snowfall in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on March 13, 2018 shows the Jinsha River in Deqin County of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on March 15, 2018 shows Songzanlin Monastery in Shangri-la City of Diqing Tibetan Autonomous Prefecture, southwest China's Yunnan Province. (Xinhua/Hu Chao)