This aerial photo taken on Dec. 22, 2023 shows the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

This aerial panoramic photo taken on Dec. 22, 2023 shows the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

A staff member works at the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China, Dec. 22, 2023. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

Staff members work at the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China, Dec. 22, 2023. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

This photo taken on Dec. 22, 2023 shows a unit of the Wudongde hydropower station in operation on the border of Sichuan and Yunnan provinces in southwest China. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

This aerial photo taken on Dec. 22, 2023 shows the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)

This aerial photo taken on Dec. 22, 2023 shows the Wudongde hydropower station on the border of Sichuan and Yunnan provinces in southwest China. Wudongde hydropower station is a major national project to implement China's west-to-east power transmission program. (Xinhua/Hu Chao)