Group meetings are only for graduate students. Postgraduate group meetings mainly include but are not limited to exchange group meetings between tutors and postgraduates, such as reporting work, analyzing problems, next work plans, literature lectures, etc. Usually students from the same tutor, also called the same research group, choose a time, and each graduate student will report to the teacher what he has done recently, the progress of the project, where he has encountered problems and so on. The time and frequency of each laboratory group meeting depends on the laboratory. Some laboratories once a week, some once every two weeks, and some once every half semester. Generally speaking, students in the first year of research will explain what documents they have read recently or how the tasks handed in by teachers have been completed. Students in the second year of research generally begin to study the topic, and the teacher will ask about the progress of the topic. Moreover, some teachers also assign tasks, or help teachers with projects, or write papers. These also need to be reported to the teacher. Students in the third year of research began to study and write graduation thesis. Report the graduation thesis to the teacher.