Research on media use and media literacy education of left-behind children in rural China 并列题名：Research on media use and media literacy education of left-behind children in rural China Research on residential school education of left–behind children in rural areas 并列题名：Research on residential school education of left–behind children in rural areas Research on the development of education, science and culture in rural China Research on equity of resources allocation of primary education in poverty-stricken areas in rural China