1. State Key Lab of CAD&CG, Zhejiang University, China
2. State Key Lab of CAD&CG, State Key Laboratory of CAD & CG, Zhejiang University, China
3. State Key Lab of CAD&CG, Zhejiang University, China and Zhejiang Lab, China
4. Tencent, China
5. The University of Hong Kong, China
6. China Mobile (Hangzhou) Information Technology Co., Ltd, China