Workers patrol at the underground workshop of Fengning pumped-storage power station in Fengning Manchu Autonomous County, north China's Hebei Province, Dec. 31, 2024. Fengning power station, the pumped-storage power station with the largest installed capacity of its kind in the world, was put into full operation on Tuesday. (Photo by Wang Liqun/Xinhua)

　　A drone photo taken on Dec. 31, 2024 shows a reservoir of Fengning pumped-storage power station in Fengning Manchu Autonomous County, north China's Hebei Province. Fengning power station, the pumped-storage power station with the largest installed capacity of its kind in the world, was put into full operation on Tuesday. (Photo by Wang Liqun/Xinhua)

　　A drone photo taken on Dec. 31, 2024 shows a reservoir of Fengning pumped-storage power station in Fengning Manchu Autonomous County, north China's Hebei Province. Fengning power station, the pumped-storage power station with the largest installed capacity of its kind in the world, was put into full operation on Tuesday. (Photo by Wang Liqun/Xinhua)