There are more than fifty subgroups within the main songbun castes, and once you become an adult, your status is constantly being monitored and adjusted by the authorities. A network of casual neighborhood informants and official police surveillance ensures that nothing you do or your family does goes unnoticed. Everything about you is recorded and stored in local administrative offices and in big national organizations, and the information is used to determine where you can live, where you can go to school, and where you can work.
