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Aerial photo taken on Jan. 22, 2019 shows the snow-covered Shandan Ranch with the Qilian Mountains in the background in Shandan County of Zhangye City, northwest China's Gansu Province. (Xinhua/Li Xiao)
Aerial photo taken on Jan. 22, 2019 shows the snow-covered Shandan Ranch with the Qilian Mountains in the background in Shandan County of Zhangye City, northwest China's Gansu Province. (Xinhua/Li Xiao)