For geographical and historical reasons， various regions of China are tremendously imbalanced in terms of economic development. As China’s overall economy accelerated， an enormous gap between urban and rural areas emerged. In these circumstances， great numbers of rural laborers swarm to cities as migrant workers， leaving tens of millions of children growing up in their hometowns without parental supervision.
　　The so-called “left-behind children” have already become a massive group that cannot be neglected. According to the Report on Left-Behind Children in Rural Areas and Migrant Children in China released by All-China Women’s Federation （ACWF） in May 2013， the country’s 61 million left-behind children in rural areas account for 37.7 percent of all rural children and 21.9 percent of total population of Chinese children.
　　Missing parental care and guidance， left-behind children face considerable risk in physical safety， mental health， and education， which have become social issues sparking great concern from all walks of life.