Yes, you can. Students whose duplicate checking rate is 20%-35% will be asked to revise their papers again, and then reply after passing the examination. If the duplicate checking rate is higher than 35%, you will definitely ask for an extension of the defense, rewrite it, fill in the application test form within six months after the supervisor approves it, and give a chance to defend it after resubmitting it. So unqualified ones can only be modified or rewritten.