The first draft of graduation thesis does not need a thank-you letter. Graduation thesis needs to be revised many times before it can enter the defense stage. Tribute is the last content of the paper. The main content is to thank those who have helped themselves during their studies in recent years, including parents, classmates and teachers. This can be supplemented after the paper is finalized.
However, it also depends on the specific requirements of the school, and some schools have to fill it out.