Shanghai had 22.21 million residents by the end of last year – 14.12 million with registered residency and 8.3 million migrants who lived in the city for more than six months.
The population density in the city last year was 3,503 people per square kilometer, more than 20 times the national level.
Officials said there were four features which stood out in regard to the city’s population in the past five years: the rapid rise in the number of migrants; the imbalance between the old and young; the rise in population density; and the increase in life expectancy.
by Cai Wenjun
(Shanghai Daily, Thursday 7th April 2011, pg A3)