You mean Yankuang Group. The group is headquartered in Zoucheng, Shandong. Subordinate coal mines are mainly distributed near Yanzhou and Zoucheng.
Among them, Xinglongzhuang Coal Mine, a national first-class mine, is located in Zoucheng. Generally, there will be mined-out areas after coal mining, which are at a certain distance from the ground. But it will collapse after a long time, and the ground will form a subsidence area. Some subsidence areas are near the village, so all the villages involved have to be relocated.