You can't. According to Sohu News, the title defense is a very rigorous and formal occasion. As a respondent, gfd is very important. You should wear formal or professional clothes on this occasion. Title defense is a comprehensive interview assessment of applicants. On the one hand, it is to verify the applicant's materials and papers, on the other hand, it is to examine the individual's work ability and performance, so as to make a relatively comprehensive evaluation to confirm whether the applicant has the qualification to be promoted to a higher level title.