Suck Joo Na Suck Joo Na is a world-renowned expert in the field of welding and laser materials processing technology. He is a full-time professor at the School of Materials Science and Engineering of Xi'an Jiaotong University in China since 2018. Professor Suck Joo Na received his PhD in engineering from Braunschweig University of Technology, Germany. He is a fellow of the Korean Academy of Science and Technology, the American Welding Society (AWS) and a fellow of the International Institute of Welding (IIW). He was the President of the Korean Welding and Joining Society and the President of the Asian Welding Federation with a good reputation and deep influence in the international welding area. His current research interests include CFD-based thermal, metallurgical and mechanical characterization (digital twin) of laser materials processing. Professor Na can be reached by email at suckjoo.na@xjtu.edu.cn.