Huge numbers of new city dwellers might also upset social stability and security due to unequal access to resources and welfare, Wang said.

In East China's Shanghai municipality, there are 400,000 children of migrant workers and few of them can get as good an education in the city as their urban counterparts because they do not have an urban hukou, reports said.

They pose a great challenge to public security, particularly after graduation, experts warned. Most crimes in Shanghai are committed by migrants.

Meanwhile, the International Federation of Red Cross and Red Crescent Societies has warned that the formation of urban slums and social riots are likely results of rapid urbanization.