Since students do not enroll in the first grade, the credit is fixed (first semester 30 credits, second semester 29 credits). In the second year, there will be individual differences but generally most of students get 25–29 credits per semester. In the third grade, the individual differences become more pronounced. Usually, about 40 credits are allocated to the first and second semesters. There are about 6–15 hours between classes. However, the level of difficulty of the subject greatly increases and also they live in the burden of entrance examination.