The starting point of senior high school is 3 years, 4 years (some professional technician classes) and 5 years for junior high school. According to the documents issued by the Ministry of Human Resources and Social Security [2016] No.121 and Yuefa [2011] No.14, the graduates of intermediate class, advanced class and preparatory technician (technician) class in technical colleges are treated according to the equivalent secondary school, junior college and undergraduate education respectively.