If a school or college fails to pass the unified defense, it can also have an opportunity to postpone the defense, which can be said to be two opportunities. If the defense is postponed or failed, it can only be re-defended in the second year. Failing the thesis defense and failing the exam are of the same nature, and graduation certificates and degree certificates cannot be issued because they do not meet the basic requirements of students for graduates. The paper can be revised many times, or the topic can be changed temporarily. Generally speaking, the thesis needs to be revised again after the defense before it can be submitted to the school for filing.