1. Contact the academic affairs office of the school in time: inform the academic affairs office of the school of the mistakes in course selection and consult its suggestions and solutions. They will ask you to fill out an application form for course selection adjustment, and then they will process your application according to the regulations of the school.

2. Communicate with teachers or counselors: If you choose the wrong course because you don't understand the course content or course selection requirements, you can contact the teachers or counselors of related courses to explain the situation and seek their help. They will give you some advice or help you change the course.