Not difficult. Undergraduate defense needs full preparation. Before the defense, students should carefully review the thesis, be familiar with the research background, purpose, methods, data analysis, discussion and conclusion of the thesis, master the main idea and points of their own thesis, and make full preparations for the defense. In the process of defense, they sometimes encounter thorny problems or challenges, which requires students to remain calm and confident, actively answer questions, and properly handle areas that need improvement and improvement.