Research on economic integration of migrant population in China 并列题名：Research on economic integration of migrant population in China the economic integration of greater china Research on the citizenization of migrant population in rapid urbanization areas Empirical research on economic impact of VAT transformation in China The economic integration of Greater China 并列题名：Research on the citizenization of migrant population in rapid urbanization areas Economic integration of internal migrants in China research on trust in charitable organizations in China research on works stress of internet companies in China