Technicians inspect a photovoltaic power station at Hutou Mountain of Liulin Town in Neiqiu County, north China's Hebei Province, Aug. 21, 2019. Neiqiu County has vigorously developed photovoltaic power generators by transferring 2,400 mu (about 160 hectares) uncultivated hillside into two photovoltaic power stations. (Xinhua/Mou Yu)