1. Xiangtan University, School of Public Administration, Xiangtan, China
2. Renmin University of China, School of Sociology and Population Studies, Department of Social Work and Social Policy, Beijing, China
3. Tianjin Di Ai Zhi Jia Hard-Pressed Families Service Center, Tianjin, China
4. Renmin University of China, Research Institute of Social Construction of Beijing, Beijing, China