1. Big Graph Center, College of Computer Science, Hangzhou City University, and the College of Computer Science, Zhejiang University, Hangzhou, China
2. Department of Electrical and Computer Enigneering, National University of Singapore, Singapore
3. School of Software Technology, Zhejiang University, Hangzhou, China
4. College of Computer Science, Zhejiang University, Hangzhou, China
5. Big Graph Center, College of Computer Science of Hangzhou City University, the ZJU-Bangsun Joint Research Center, and the Shanghai Institute for Advanced Study, Zhejiang University, Hangzhou, China