These letters represent different educational levels, A and C stand for junior college majors, B and D stand for undergraduate majors (self-taught exams), and Z and Y stand for short-term majors (that is, public courses are unified exams, and junior colleges set their own questions, commonly known as self-taught exams). For example, if you plan to apply for the self-taught undergraduate course, choose the B and D code majors, and the same is true for others.

The meaning of self-taught professional code is to classify specialties, undergraduate courses and majors through codes. The professional code of self-taught examination is different from that of full-time undergraduate colleges, so candidates can't compare the professional code of self-taught examination with that of full-time undergraduate colleges, because they are not a system at all.

However, the self-study exam will use professional codes, as long as the course name, professional codes and candidates' full-time academic qualifications can be exempted. Even if the majors are different, they can be exempted from the exam, so the professional code of the self-taught exam also has the effect of exemption from the exam.

Extended data:

Candidates can refer to the examination plans of various provinces, and candidates can choose their majors according to their actual situation.

Interest is the most important starting point. Only those who are interested will really devote themselves to learning.

2. Some majors have special requirements for certain abilities of candidates, so you must consider your own abilities when choosing a major.

3. Reasonable arrangement of career planning. We should have a clear orientation and firm goals for the new life, and give full consideration to social needs and industry development.

4. Some majors are open to the society, and some majors are entrusted by departments and are limited to employees within the system. Some undergraduate majors and special majors (such as medical majors) have some specific requirements for candidates' academic qualifications and occupations.

Higher education self-study examination is not easier than full-time single-subject examination on campus, on the contrary, it will be more stringent. Most self-taught students study while working. They can combine their own work and choose their major completely freely, because they know what they lack, and their social adaptability and practical experience far exceed that of the unified enrollment.

References:

Baidu encyclopedia-higher education self-study exam