premise: A senior researcher with the State Council, or the central government, has called on cities to allow more rural people to take up residence in a bid to promote urbanization and maintain the country's fast economic growth.
  Urbanization will help drive the economy and improve the people's living standards, says Han Jun, head of the Development Research Center under the State Council. His signed article was published by People's Daily on Friday.
  It's expected that some 289 million rural people, equivalent to the entire total population of the United States, will move to cities over the next 15 years.
  He estimates by 2020, 57 percent of China's population will live in urban areas. By that time 828 million will be living in cities, whereas in 2002 urban dwellers numbered 326 million.
   What does the promotion of urbanization cause?
hypothesis: maintain the country's fast economic growth