Aerial photo taken on Oct. 23, 2019 shows heliostats of a molten-salt solar thermal power plant in Dunhuang, northwest China's Gansu Province. [Xinhua/Ma Ning]
Workers clean heliostats for a molten-salt solar thermal power plant in Dunhuang, northwest China's Gansu Province.[Xinhua/Ma Ning]
Workers clean heliostats for a molten-salt solar thermal power plant in Dunhuang, northwest China's Gansu Province.[Xinhua/Ma Ning]
Workers clean heliostats for a molten-salt solar thermal power plant in Dunhuang, northwest China's Gansu Province. [Xinhua/Ma Ning]
Editor:Iris
