1. Department of Social Work and Social Policy, Nankai University, Tianjin, China
2. Department of Social Work, School of Social Development, Tianjin University of Technology, Tianjin, China
3. Department of Sociology and Social Work, Minzu University of China, Beijing, China
4. Bajiao Street Office, Beijing, China
5. Department of Social Sciences, Faculty of Social Science and Business Studies, University of Eastern Finland, Kuopio, Finland