A view of China's first molten-salt solar thermal power plant in Dunhuang City, Northwest China's Gansu Province, Dec. 9, 2016. The molten-salt solar power plant, which was successfully connected to the grid on Dec. 26, 2016, is the third of its kind in the world and it generates electricity purely from solar power 24 hours a day. (Photo: China News Service/Yang Yanmin)