户口，是与中国人的社会生活各色相关的特殊证件。在中国社会中，每个人的出生、上学、就业、参军、结婚、迁徙......无不受到户口的制约。尤其是在农村与城市之间、小城市与大城市之间，户口犹如一道无形的屏障，一般人很难逾越。那些没有户口的人们被称为“黑人黑户”而遭到社? Account, is a special document related to the color of the Chinese people’s social life. In Chinese society, everyone’s birth, school, employment, joining the army, marriage, migration ... ... are all subject to the restrictions of the hukou. Especially between rural areas and cities, between small cities and big cities, hukou is like an invisible barrier, and most people find it hard to surpass them. Those who do not have accounts are called “black black ” and was social.