Some schools can take some credits during the holidays. However, the requirements of each school and major are different, and even if you can take credits, it is limited. Four-year undergraduate courses and credit arrangements are scientifically arranged, so it is difficult to finish the meeting in advance, especially in famous universities. You can't simply accumulate credits to finish your studies ahead of schedule.
Generally speaking, students need to reach GPA3.7 or above to qualify for additional credits. This standard is relatively high. Generally, students who have achieved this grade can enjoy 75%- 100% tuition fee reduction. It is possible to shorten one semester. However, most students have completed their four-year studies step by step. It depends on the requirements of the school and the students' own achievements and performance.