North of Pei County 10 km is the headquarters of Datun Company of China Coal Group, which has four subordinate mines, namely Longdong Mine, Yaoqiao Mine, Xuzhuang Mine and Kongzhuang Mine from north to south.
Twenty kilometers northwest of Pei County is Zhangshuanglou Mine, a subsidiary of Xukuang Group.
30 kilometers northeast of Peixian County is Sanhe Jianlou Mine (near Longdong Mine) under Xukuang Group.
I'm from Longdong Mine. By the way, these are all coal mines, all mined by underground workers, not in the open air.