3+2 means: 3 years technical secondary school +2 years junior college; 3+2=5, that is to say, if you want to graduate in five years, you will be awarded a junior college degree without a secondary school diploma. College degree is higher, and there is no secondary school diploma.
In fact, 3+2 was originally designed to expand the number of students, develop the school scale and education ladder. Now that the technical secondary school diploma is about to withdraw from the education stage, it is necessary to achieve 3+2 to follow the trend. This is actually the necessity of educational development. At present, junior college is the lowest stepping stone to work abroad, and technical secondary schools are generally dominated by technicians, so the job market has shrunk seriously.
"3+2" is the abbreviation of "through teaching" in secondary and higher vocational schools. After graduating from junior high school, students pass the senior high school entrance examination, enter secondary vocational schools (technical schools) for three years, then enter higher vocational schools for two years, and finally graduate from junior college (higher vocational schools).