Computer CS major starts teaching from scratch. But students need to have a certain mathematical foundation. Because there is a mathematics course in computer course, discrete mathematics, which is a course that has never been touched by domestic high schools. For students with zero foundation, it will be more difficult to keep up. Because different languages will have a certain adaptation transition time, and they have not been exposed to knowledge points, they will learn slowly and some students will have a hard time. It is suggested to memorize more academic vocabulary in advance and preview some basic theoretical courses to avoid the difficulty of studying abroad. Moreover, the courses of freshmen are relatively simple. If you are a sophomore or a junior, it will be very dangerous. You may fail this course and the exam. If you want to review, preview, and cram the relevant CS professional course knowledge, you can find a small housekeeper who wants to study after the exam. Help everyone solve problems and avoid failure in studying abroad.