World urbanized, and nowhere is it evident that urbanization in China. In the early 1980s -century there were 20 percent of the population in cities. Today, nearly half of China's huge population urbanized. Figures boggles. 160 of China's cities have more than one million inhabitants. Five of them are so-called mega-cities with over ten million inhabitants. Now the country's authorities decided to take another step. By interconnecting the nine cities in the dense industrial Pearl River delta in southeastern China is the world's largest city with 42 million inhabitants constructed.