Junjie Luo is currently a Lecturer in the School of Mathematics and Statistics at Beijing Jiaotong University. Before this, he was a postdoctoral researcher at Nanyang Technological University under the supervision of Xiaohui Bei and a postdoctoral researcher at TU Berlin under the supervision of Rolf Niedermeier. He obtained his PhD in Operations Research and Cybernetics from University of Chinese Academy of Sciences in 2019, where his advisor was Jinchuan Cui. He obtained his bachelor’s degree from Zhejiang University in 2014, majoring in Mathematics and Applied Mathematics.