Qingjun Guan is currently an Associate Professor at the Hunan University of Science and Technology. He graduated from Central South University in 2018 with a major in Mining Engineering and received a PhD in Engineering. He is mainly engaged in research on the comprehensive utilization of mining solid waste, extraction of rare and precious metals from coal and its by-products, solution extraction, and environmental emergency treatment of tailings ponds. He is a member of the Nonferrous Metals Society of China.