Prof. Hongbo Zhao (1988. 09-) obtained his BSc, MSc and PhD degrees from Central South University in Changsha, China. He studied in the Talented Student Class of Chemistry (Honor Class of Chemistry) at Central South University between 2008 and 2012. He then commenced his PhD studies, instructed by Professor Guanzhou Qiu, in 2012 and obtained his doctoral degree in Minerals Processing Engineering in 2016. Since 2016, he has been working at Central South University as an associate professor. His researches mainly focus on Mineral processing and extractive metallurgy (Resource recovery), Biohydrometallurgy, Bioremediation, Environmental chemistry, Biogeochemistry and Electrochemistry. Prof. Zhao has more than 30 publications as the first author/corresponding author, of which more than 20 publications were indexed by SCI, and one monograph. Prof. Zhao has applied for 15 patents, and 7 have been authorized. Prof. Zhao is now presiding over 6 research projects, and has obtained many awards, such as the Young Elite Scientists Sponsorship Program supported by CAST (2017-2019) and 15th Excellent Natural Science Paper of Hunan Province, etc. Prof. Zhao is now serving as the associate editor of Chemie der Erde-Geochemistry (SCI, IF=1.723), editor of Frontiers in Microbiology (SCI, IF=4.019), editor of Plos one (SCI, IF=2.766), guest editor of Minerals & Metallurgical Processing (SCI, IF=1.714), the advisory editor of Cambridge Scholars Publishing, the committee member of the Committee of Comprehensive Utilization of Metallurgical Resources, and the committee member of the Industrial Alliance of Nonferrous Metals of China, etc. Prof. Zhao is serving as the reviewer of more than 20 SCI indexed journals, such as Journal of Hazardous Materials, ACS Sustainable Chemistry & Engineering, Electrochimica Acta and Hydrometallurgy, etc. In addition, Prof. Zhao has rich practical experiences in the mining and metallurgical industries.Prof. Congren Yang (1985. 03-) received B.Sc. (2008), M.Sc. (2011), and Ph.D. (2015) degrees in minerals processing engineering from the School of Minerals Processing and Bioengineering, Central South University (Changsha, China). His doctoral supervisor is Prof. Wenqing Qin. Prof. Yang was a postdoctoral fellow at the School of Environment of Tsinghua University (Beijing, China) in 2015.12-2018.06. Since 2018, he has been working at Central South University as an associate professor. His research interest focuses on mineral processing, hydrometallurgy, electronic waste treatment, and metals recycling and sustainability. Prof. Yang published over 20 peer-reviewed journal articles, and applied more than 1o patents.Prof. Xian Zhang (1988. 11-) obtained the PhD degree in microbiology at Central South University in Changsha, China. Since 2017, he has been employed by Central South University as an associate professor. He is experienced in the field of environmental microbiology and microbial ecology. Prof. Zhang has long been devoted to the omics-based study on mineral-bioleaching microorganisms, with a specific focus on their ecological roles and metabolic functions. As of now, he as the first author/corresponding author has over 10 SCI papers that have been published in various international authoritative journals, such as BMC Genomics, Applied and Environmental Microbiology, and Frontiers in Microbiology.Dr. Yisheng Zhang is a professor in the School of Minerals Processing & Bioengineering, Central South University, and a scientist at the Key Lab of Biohydrometallurgy of Ministry of Education, both in Changsha, Hunan, China.