China is a very big country. But only a small portion of the land is suitable for living. Almost 94 percent of Chinese people live in the Southeast part of the country which covers 43 percent of its land area; while the other six percent people live in the northwestern areas which cover 57 percent of the territory. [1] And people like to live in cities. Can you imagine there are 23.9 million people [2] in Shanghai City?

[1] http://www.travelchinaguide.com/essential/country.htm

[2] http://worldpopulationreview.com/world-cities/shanghai-popul...