1. The United Nations Population Fund The State of the World Population 2007: unleashing the potential of urban growth
2. China Women's Federation National survey of left-behind children in rural areas http://www.china.com.cn/hibo/2008-02/27/content_
3. Stocktaking Report Child Welfare in China http://uploads/soft/1_110531163254.pdf
4. China Women's Federation National survey of left-behind children in rural areas and migrant children in urban and rural areas http://acwf.people.com.cn/n/2013/0510/c99013-21437965.html
5. A social adaptation comparison of migrant children, rear children, and ordinary children;Fan;J Beijing Normal Univ (Soc Sci),2009