Credit (Xuéfn) is a unit of measurement, which is used to calculate students' learning volume. Calculated by semester, the specific academic achievements of each course and practice link shall be subject to the provisions of the professional teaching plan. Some schools also have a system of charging by credit. Credits can be used to judge the breadth of knowledge learned by students during their college years. The more credits students get, the more things they learn. In some universities, credits have also become an important criterion for evaluating students' Excellence.