Xu-Cheng Yin is a full professor, the director of Pattern Recognition and Artificial Intelligence Lab, Department of Computer Science and Technology, School of Computer and Communication Engineering, University of Science and Technology Beijing, China. He received the B.Sc. and M.Sc. degrees in computer science from the University of Science and Technology Beijing, China, in 1999 and 2002, respectively, and the Ph.D. degree in pattern recognition and intelligent systems from the Institute of Automation, Chinese Academy of Sciences, in 2006. He was a visiting professor in the College of Information and Computer Sciences, University of Massachusetts Amherst, USA, for three times (in 2013, 2014 and 2016). He recieved the National Science Fund for Distinguished Young Scholars in 2021. His research interests include pattern recognition, document analysis and recognition, computer vision, machine learning, and data mining. Chun Yang received the B.Sc. and Ph.D. degrees in computer science from the University of Science and Technology Beijing, China, in 2011 and 2018, respectively. He is currently a lecturer with the School of Computer and Communication Engineering, University of Science and Technology Beijing. His current research interests include pattern recognition, classifier ensemble, and document analysis and recognition.   Chang Liu received the B.Sc. degree in computer science from the University of Science and Technology Beijing, China, in 2016, where he is currently pursuing the Ph.D. degree with the Department of Computer Science and Technology. His research interests include text detection, few-shot learning, and text recognition.