Urban agglomerations in the People’s Republic of China. Specifically their Rank Mobility Index between 1985 and 2005. Every urban agglomeration in China can be ranked by population…this is done for 1985 and again for 2005. A mobility index can be calculated as follows: ([Rank1985] – [Rank 2005]) / ([Rank1985] + [Rank 2005]). The more negative the value, the greater the decrease in rank, the more positive the value the greater the increase in rank. A rank change carries more weight when it is higher on a ranking list (and therefore the urban agglomeration is larger).
This map shows the intense urban growth in Southeast China right along the coast. In the mid-1980s, the Chinese government designated many of these coastal cities as “special economic zones” which improved some of these areas economically with increased foreign investment going into the 1990s. Better opportunity lead to rapid increases in population.