1. During the undergraduate study in domestic universities, you can generally choose at most two majors, one is your major (when you are admitted to the college entrance examination) and the other is your minor major (usually in your sophomore year, you choose one of the minor majors offered by the school, start studying after a certain selection of exams, complete the required credits, and defend your thesis before graduation, and you can get a bachelor's degree), which is called

2. About elective courses. University elective courses can be divided into two categories: public elective courses and professional elective courses. Public elective courses generally require low credits, about 10 credits, and some schools have restrictions on humanities and science and technology courses that contain several credits. Professional elective courses are generally only provided to students of this major, and most of them are professional courses, with a total credit requirement of more than 20 points, which is an important way to master professional knowledge. The credit requirements of elective courses are generally hard indicators for graduation, and only after completing credits can you qualify for graduation. Tuition in some schools is related to the academic performance of elective courses.