[Nokinside]

Hukou style register is common in Asia. Japan and Taiwan have it too.

Like I said, Chinese government still want's to prevent uncontrolled rural-urban population transfers and formation of slums. Undocumented immigrants in United States are analogous problem (citizens versus immigrants).

But the system has been radically changed. If person can show that they have work or house after six months they can stay and get their children in school etc.