First of all, make sure who has the right to decide your paper, and the defense teacher also has a team leader. If the teacher is honest and frank, talk about his mood of wanting to graduate and his performance in four years; If a teacher is sophisticated, he should express his mind appropriately and be generous. After all, graduation is a big deal.

Secondly, the defense teacher should be his own professional teacher. If someone has taught you, communicate well. If it is an objective paper problem, then change the paper. If it is a subjective teacher problem, communicate with the teacher.

Finally, see if you have any problems, such as poor communication with the teacher, and apologize to your face and from your heart.

Graduation is a big event, please be flexible. I hope I can help you and wish you a smooth graduation.