Second, there are different requirements for teachers' academic qualifications. The average teacher's education is basically below the graduate level, but higher education is different. Teachers' academic qualifications are very demanding, and the minimum should be postgraduate education.
Third, the income is different. The income of higher education teachers is generally higher. Everything is split in two. You can't be a teacher with a low education, but it doesn't mean that the higher the education, the better. Especially in the compulsory education stage. Teachers with excellent grades and high academic qualifications are often quick-thinking and infer students' learning situation from their own learning situation. Therefore, teaching is often fast, difficult and deep, which is likely to be helpful to gifted students, but it is not helpful to intermediate students, especially poor students, and it is likely to fail to keep up.