1. Research Center for Complexity Sciences, Hangzhou Normal University, Hangzhou, China
2. Paul and Marcia Wythes Center on Contemporary China, Princeton University, Princeton, NJ, USA
3. School of Public Finance and Taxation, Zhejiang University of Finance and Economics, Hangzhou, China
4. College of Media and International Culture, Zhejiang University, Hangzhou, China
5. Department of Mathematics, North University of China, Shanxi, China