1. School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, Jiangxi, China
2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
3. University of Chinese Academy of Sciences, Beijing, China
4. Institute of Education Development, Nanchang University, Nanchang, China
5. School of Geography and Tourism, Anhui Normal University, Wuhu, Anhui, China