Yan' an university mathematics major does not need to take the teacher qualification certificate. The qualification certificate of college teachers is not open to the society, only in-service college teachers can apply for it, and graduate students who have just graduated have no chance to take the qualification certificate of college teachers. There are no professional restrictions on applying for the teacher qualification certificate. No matter the major of civil engineering, computer, literature or economics, you can choose any subject when you apply for the exam.