Universities usually need to meet certain conditions and procedures when changing majors. Although some schools may have some gray areas or special regulations, I encourage you to apply for a major change through formal channels. Reasonable planning and preparation can improve your chances of success and make you better adapt to new professional fields. It is also a good way to consult the relevant departments of the school, understand the specific requirements and procedures for changing majors, and communicate with the academic teachers or counselors of the college.

In some cases, some schools may have some special policies or regulations that allow students to change their majors in an unconventional way. These may include internal recommendations, interviews, special tests, course performance requirements and so on. But these opportunities are usually limited, and the policies of each school may be different.

Changing to a major as a back door may not be a reliable choice. Schools usually encourage students to do their best in their original majors, because changing majors may have an impact on your academic progress and academic development. The best advice is to carefully evaluate your interests and career goals, communicate with academic and career guidance personnel, and seek their advice and help. They can give you professional advice on choosing your major and changing your major, help you take the right steps, and ensure that you make an informed decision.

In some cases, it may be considered as a back door or an unconventional way.

Internal recommendation: Some schools may let students get the opportunity to change majors through internal recommendation. This usually requires you to communicate with the professors or tutors of the target major and get their recommendation and support. Personal statement or interview: Some schools may ask you to submit a personal statement or attend an interview, explaining why you want to change your major and your adaptability and potential.

Supplementary courses or exams: Some schools may require you to pass specific courses or exams to prove that you have enough ability to adapt to the target major. This can fill the gaps in your knowledge and skills in this field. Keep good grades and academic records: No matter which way you try to change your major, it is very important to keep good grades and academic records.