I got my bachelor and Ph.D. both in Applied Mathematics from the National University of Defense Technology and Zhejiang University in 1992 and 1997, respectively. Then I was a visiting researcher in the University of Louis Pasteur (now part of University of Strasbourg) in France and the Chinese University of Hong Kong successively. In 1999, I joined the State Key Laboratory of Computer Aided Design and Computer Graphics in Zhejiang University as a faculty member in 1999. At the end of 2003, I became a full Professor of computer science.