This is an excerpt of the original article published by South China Morning Post. To read the full article, please click here.

Researchers from Stanford University, working together with Chinese academics, found a high drop-out rate in rural China. Many of the drop-outs are left-behind children. 

Constrained by time and money, migrant parents usually manage to go home only once a year, typically during the Lunar New Year. The lack of interaction between parents and children has led to psychological and developmental problems for some children.