1. Department of Sociology, School of Humanities and Social Sciences, Fuzhou University, China
2. Department of Sociology, University of Chicago, USA
3. Center of GeoInformatics for Public Security, School of Geography and Remote Sensing, Guangzhou University, China
4. Center of GeoInformatics for Public Security, School of Geography and Remote Sensing, Guangzhou University, China, and Department of Geography and GIS, University of Cincinnati, USA
5. Department of Landscape Architecture and Urban Planning, Texas A&M University, USA