Study raises questions about hukou

As Beijing's migrant population continues to grow, some experts believe the decades-old hukou system is outmoded and broken.

The policy requires migrants to get temporary permits, or the much harder to obtain hukou, once they move to the city.

These days, a growing number of those who relocate to find better jobs in Beijing tend to stay longer or even resettle with their entire families, according to a study by the Renmin University of China.