Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province. (Photos: Xinhua)

Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province.

Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province.

Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province.

Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province.

Photo taken on Dec. 28, 2020 shows the winter scenery in Weiyuan County of Dingxi City, northwest China's Gansu Province.