Not vulgar, not exposed
Teachers should be kind and generous in work and class, reflect teachers' professional characteristics, and dress should leave a mature and stable impression on students. You can't wear "rustic", otherwise you can't achieve the "serious" educational purpose. Can't wear "tacky", otherwise it will have a negative impact on students' ideological education. It is not advisable to wear "cool clothes" and put an end to wearing vests, miniskirts and slippers in class. Don't wear "partially exposed" clothes such as halter tops and sleeveless tops.
Set an example first
Imagine that when a scantily clad female teacher turns and raises her hand to write on the blackboard, the eyes from under the podium can easily visit the teacher's inadvertently exposed waist or underwear, which will be very embarrassing. What people don't want to see is that in such a solemn place as the classroom, students are bored and confused and have meaningless imagination because of the teacher's clothes. To win the respect of students, teachers must first set an example.