Photo taken on May 9, 2020 shows the snow-covered fields on the Maoyu Mountain in Dangchang County of Longnan City, northwest China's Gansu Province. A snowfall hit the county on Saturday. (Photo by Liu Hui/Xinhua)

Photo taken on May 9, 2020 shows the snow-covered fields on the Maoyu Mountain in Dangchang County of Longnan City, northwest China's Gansu Province. A snowfall hit the county on Saturday. (Photo by Liu Hui/Xinhua)

Photo taken on May 9, 2020 shows the snow-covered terraced fields on the Maoyu Mountain in Dangchang County of Longnan City, northwest China's Gansu Province. A snowfall hit the county on Saturday. (Photo by Liu Hui/Xinhua)

Photo taken on May 9, 2020 shows the snow-covered fields on the Maoyu Mountain in Dangchang County of Longnan City, northwest China's Gansu Province. A snowfall hit the county on Saturday. (Photo by Liu Hui/Xinhua)