The Data from the fifth national population census show that migration of whole nuclear families has become the main form for the floating population who work in the city. This appears even more salient in Beijing. Based on the survey，this report conducts an in-depth analysis on the basic situation，family condition，study，after-school activities，integration into city life，their identification as city residents，their experience of life and the prospect of their future. The report describes the overall characteristics of that group who are so urbanized that they cannot return to where they are from. Meanwhile，the conflicts between the trend of their totally urbanizing and their identity as city residents with incomplete legal rights，result in challenges they have to face in terms of equality in education，identity，plan for future，etc. Through investigation and analysis，this report put forth some advices from the perspectives of equality in education，equality related to registered permanent residence，learning environment，psychological services，etc.，to be consulted by the relevant departments in formulating social policies.