1. College of Geographic Science Hunan Normal University Changsha China
2. School of Geographic and Oceanographic Science Nanjing University Nanjing China
3. School of Economics Zhejiang University of Finance and Economics Hangzhou China
4. College of City and Tourism Hengyang Normal University Hengyang China
5. School of Chemical and Environmental Engineering Jiangsu University of Technology Changzhou China
6. School of Sustainable Engineering and the Built Environment Arizona State University Tempe AZ USA