This book has made the analysis to the course of social changes in China since reform and opening for 30 years, has discussed the changes in the social structure, in the social policy, in the social system and in the urban and rural regions etc. from the overall sociological angle of view, has made the detailed analysis to the influence of this great process to the Chinese social stratification, the rural society, the urbanization, the urban governance structure, the unit system, the crowd consumption, the status of women and the social policy etc., meanwhile has analyzed the relations between nuclear technical progress and social changes. Nine sociological scholars’ academic straightening-up and rational reconsideration have provided comprehensive and particular angle of observation for readers to understand the vicissitude of social development in China for 30 years.