Cai-Jun Zhang is with the College of Metallurgy and Energy at North China University of Science and Technology in Tangshan, Hebei, China (e-mail: zhangcaijun_ncst@163.com). He was born in Handan, Hebei, China, in 1971. He received his M.S. and Ph.D. degrees from the University of Science and Technology Beijing in 1996 and 2003, respectively. He is a professor at the North China University of Science and Technology. His main research interests include the industrial Internet of Things, iron and steel big data, intelligent computation, etc.