I think it's good for Yunnan University to change majors. Before, many students in our class changed majors, some got good grades and some failed. Changing majors is always at the beginning of the next semester, so you have to take the exam. The subjects you take depend on which major you want to change. If you get high grades, you can transfer to your favorite major. If your grades are not high, the school will arrange a major for you to see if you want to stay in your original major.