Strictly speaking, the topic selection and tutor selection of graduation thesis must be completed under the guidance of relevant personnel, because it is related to the quality of graduation thesis. But because many students practice in senior three. I can't go back to school because I'm looking for a job. In this case, you can call for advice and choose according to your own interests. The specific situation still depends on the operation mode of each school, because each school may have different practices. The way to do it well is to ask your seniors how to operate it.