Children play skipping rope games outside a makeshift house of migrant workers, Nanning city of Guangxi Zhuang autonomous region, May 27, 2012. There are approximately 230 million migrant workers in 皇冠体育app. Many children of rural migrant workers live together with parents and their living conditions lag far behind the urban counterparts. [Photo/Xinhua]

A father looks at her daughter who is doing homework at the stall of a vegetable market, Hefei city of Anhui province, May 21, 2012. [Photo/Xinhua]