There are two kinds of international classes in Xi 'an: one is to offer regular international high school courses, and the other is the international classes in the middle school attached to Normal University and Gaoxin No.1 Middle School. The second category is mainly domestic high school courses, with training courses such as AP and ACT. This kind of international class actually steals the concept of international class, which is much worse than the first class in terms of cost performance and final outlet. The first system-wide international course, the international class in the middle school attached to Normal University, is more thorough. They have taught A-LEVEL courses in English since their freshman year, which is a normal choice for most students to choose the road of studying abroad. Relatively speaking, the international class in Gaoxin No.1 Middle School is also good. They also offer A-LEVEL and AP courses, but they don't know why they have to attend domestic high school courses when they are freshmen. Personally, I feel that domestic high schools are of little use to studying abroad.