Xiaolong Xu received his B.S. degree in materials science and engineering from Tianjin University, Tianjin, China, in 2010; his master’s degree in chemical engineering from Beijing Jiaotong University, Beijing, China, in 2014; and his Ph.D. degree in materials from the FEMTO-ST Institute, Université Bourgogne Franche-Comté (UBFC), Besancon, France, in 2018. He currently serves as an Associate Researcher at the National Institute of Metrology, Beijing, China. His current research interests include quantum devices and their cryogenic applications.