Shanghai packs them in

SHANGHAI - A flood of migrant workers into Shanghai has made the city the most densely populated in the country, according to the latest census.

Over the last decade, the city has jumped from 2,588 people per sq km to 3,631 per sq km, an average annual growth of 3.4 percent.

"The major reason for the population density growth was that more migrant workers choose to find jobs and then settle down in Shanghai instead of returning to their hometowns," said Zhou Haiwang, deputy director of the Institute of Population and Development Studies, Shanghai Academy of Social Sciences.