A group of migrants are waiting for the train at the square in front of the Beijing Railway Station. A police car is visible in the background.

On top of the existing 103 million urban migrants, Chinese cities will face an influx of another 243 million migrants by 2025, taking the urban population up to nearly 1 billion people. In the medium and large cities, about half the population will be migrants, which is almost three times the current level.

China's government influences the pattern of urbanization through the Hukou permanent residence registration system, land-sale policies, infrastructure investment and the incentives offered to local government officials. The other factors influencing migration of people from rural provincial areas to large cities are employment, education, business opportunities and higher standard of living.