China's National Bureau of Statistics made an announcement in Beiijing that 51.27% of the Chinese people now live in urban areas. In 1949 the figure was 10.6%, in 1979 it was 19%. In the space of three decades China has urbanized rapidly. This has brought with it economic growth, infrastructure development and increased employment in the manufacturing sector as new workers moved from rural areas to the cities. With it also come major problems for the country and the leaders of the Communist party led government. Of the 691 million urban residents, 253 million are migrant workers- 37% of urban residents and 19% of the population are in this grey zone described as the "hukou" or household registration system. Under "hukou" these migrants from rural areas cannot access public services in the cities, and have rights to access them in their own villages where they are registered. Integrating these migrant workers who are different than their more affluent and better educated neigbors in the cities so that they become truly a part of the urban areas will remain a huge challenge for China. One of the ways China is addressing this is with the plan to build 36 million units of affordable housing for these migrant workers by 2016. Ever so gradually Chinese officials are relaxing the restrictions on migrant workers- such as Shanghai Mayor Han Zheng's announcement for allowing all migrant workers to rent subsidized housing in the outer parts of Shanghai and committing to "increase the migrant population's involvement in the community affairs, cultural life and show genuine care for them." Food security is another issue as more development on prime agricultural land means less land available for agriculture. Appropriation of agricultural land for industrial use is bringing the country down to the limit of 120 million hectares of agricultural land needed for self sufficiency in food, according to the Land Ministry. At the same time China's leaders want to avoid what the World Bank calls "the middle income trap," where a country reaches a level of modernization and urbanization, and then stalls at that level- the level being around $3000 per capital GDP, which is China's GDP per capita today, according to the National Bureau of Statistics in China. Li Keqiang, who takes over from premier Wen Biao, sees the building of affordable housing for migrant workers as a critical way to continue the urbanization process, and shift the country from its export focus by increasing consumption and the development of industries that support this. A slowing economy dominated by state owned companies focussed on a decelerating export model and an aging but still growing population- NBS says China's overall population was up by 4.8% in 2011 over 2010 and has reached 1.35 billion- presents a tougher set of challenges to the new leadership in China than was faced by the current leadership....