The Atlantic has pulled together a nice summary that might be useful for readers:
690 million – Urban Chinese population
656 million – Rural Chinese population
51.27 percent – Amount of population living in urban areas in 2011
25 percent – Amount of population living in urban areas in 1982
90 percent – Amount of population living in rural areas in 1949
60 percent – Amount of population employed outside the agricultural sector
200-300 million – Number of migrant workers estimated to have taken up at least partial residence in cities
500 million – Number of migrant workers for whom authorities need to devise methods of urbanizing, according to the report (Report being: “The Urban Blue Book: China City Development Report No. 5)
$786 billion – Estimated amount needed to provide social security and public services for the 500 million new urban residents in the next 20 years
5.2-to-1 – Income ratio for urban residents compared to rural residents
3.13-to-1 – Disposable income ratio for urban residents compared to rural residents
26 percent – Amount the urban-rural income gap has increased since 1997
68 percent – Amount the urban-rural income gap has increased since 1985
76-90 percent – the amount of urban dwellers in China’s three largest municipalities, Beijing, Shanghai and Tianjin
Sources: The Telegraph, China Daily, Xinhua and The Global Times plus “The Urban Blue Book: China City Development Report No. 5” published by the Chinese Academy of Social Sciences.