Wuqi county in Yan'an pursues ecological, sustainable development

Photo taken on June 6, 2019 shows the flowing clouds over hills at Yangqing area of Wuqi County in Yan'an City, northwest China's Shaanxi Province. Wuqi County has carried out a development policy since 1998 that returned farmland to forest for ecological protection and sustainable development purposes. (Xinhua/Tao Ming)