The Hukou regime is associated with inconveniences or problems that could hinder the mobility of the labour force. For instance, when entering into universities and colleges, students recruited have to trasfer theri Hukou to the place where their respective universities locate. When they graduate, if they could not find a job in the place other than the place where they were born, their Hukou have to be transferred back to home. A lot of students in Beijing, Shanghai and other cities could be categorised into this group of people.
Why not issue a kind of temporary ID card that fits the duration of the program they are studying? It would be much easier for people dealing with Hukou in universities and colleges and for policemen.