1. official website shows that Shangdang District, Changzhi City, Shanxi Province, Shaanxi Province belongs to Yongfeng Coal Mine, Yangtouling, Changzhi City, Shanxi Province, and mines No.3 coal.
2. Shanxi Changzhi Yangtouling Yongfeng Coal Industry Co., Ltd., established in 1985, located in Changzhi City, Shanxi Province, is an enterprise mainly engaged in coal mining and washing, with a registered capital of140100.