Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a snow-covered oil field in Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
Aerial photo taken on Dec. 11, 2021 shows a view of Heshui County, northwest China's Gansu Province. (Xinhua/Ma Xiping)
