Census register system is a type of social system that formed with the establishment of the nat ion; it is also the vital access to moralization, economic exploitation and personal control which is carried out to the people by the nation.Before the middle and late stage of the Spring and Autumn Period and the Warring States Period, clan system was the effective way for dominators to govern the whole society.At that time, there was not a clear definition of census register system. The pattern of social membership was expressed in the way of 'one person, one census register'. After the Spring and Autumn Period, Patriarchal clan was transformed into prefecture-county politics with the replacement of sib ship. The census register was established gradually with family as a basic unit. With time past, it became nation-controlled census register system during the Warring States Period, and then lasted for about 2000 years.
