Xin Li received his Ph.D. degree in School of Mathematical Science from University of Science and Technology of China in 2008. From 2007 to 2008 and 2015 to 2016, he visited Computer Science of BYU and worked with Prof. Tom Sederberg. And From 2009 to 2010, he visited Computer Science of NTU and worked with Prof. Jianmin Zheng. Since August 2008, he has been a faculty member in the School of Mathematical Sciences.