For the various social problems brought by the household registration system, I am reluctant to spend time and energy criticizing it again. Friends who know a little history will complain endlessly when they mention the household registration system. Dividing people into different forms of户口according to their occupations is just like the rulers of the Yuan Dynasty dividing different races into different levels in a barbaric way, which is full of overt and covert discrimination. Moreover, limiting people within a certain geographical area and preventing them from moving freely through legal means has further exacerbated the spread of unequal opportunities.