After the national defense students change jobs, four years of college is not counted as the length of service. Reason: According to national regulations, national defense students are not counted as length of military service during their school days, but they receive the corresponding subsidy of 1000 yuan every year. During their school days, in addition to studying, they have to take part in a certain amount of military training and military and political courses, and they have to enter military training during the winter vacation. Undergraduate students can also pass the exam to obtain postgraduate qualification, further study and master's degree, but there are few places.