Tourists visit the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province, April 21, 2019. (Xinhua/Hu Chao)

Aerial photo taken on April 21, 2019 shows the sunrise scenery on the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on April 21, 2019 shows the scenery of the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on April 21, 2019 shows the sunrise scenery on the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Tourists visit the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province, April 21, 2019. (Xinhua/Hu Chao)

Tourists visit the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province, April 21, 2019. (Xinhua/Hu Chao)

Aerial photo taken on April 21, 2019 shows the sunrise scenery on the Yulong Snow Mountain in Lijiang City, southwest China's Yunnan Province. (Xinhua/Hu Chao)