Photo taken on Nov. 25, 2017 shows the scenery of Qingquan ecological park built on the mined-out area in Handan City, north China's Hebei Province. (Xinhua/Zhu Xudong)
Photo taken on Nov. 25, 2017 shows the scenery of Qingquan ecological park built on the mined-out area in Handan City, north China's Hebei Province. (Xinhua/Zhu Xudong)
Photo taken on Nov. 25, 2017 shows the scenery of Qingquan ecological park built on the mined-out area in Handan City, north China's Hebei Province. (Xinhua/Zhu Xudong)
Photo taken on Nov. 25, 2017 shows the scenery of Qingquan ecological park built on the mined-out area in Handan City, north China's Hebei Province. (Xinhua/Zhu Xudong)
