With some=lots of paperwork, yes you can move. However, except for marrying or (sometimes) after graduation from college, you are not allowed to change your Hu

With some=lots of paperwork, yes you can move. However, except for marrying or (sometimes) after graduation from college, you are not allowed to change your Hukou. Many (most?) of the people living and working in the 'supercites' of Shenzhen, Shanghai, Chongqing, and Beijing do not have Hukou residency. Even being born there does not confer the right, if your parents do not have residency. Lack of Hukou prevents purchase of real-estate, and high-school education for children, but for the last 2 years it has been possible to get state healthcare. This leads to much higher costs of living which prevents the poor from moving to the cities en masse.