The master's defense has more than 60 chapters and has been debated twice. More than 60 points in master's defense is not a very high score. If the school requires a second defense, it needs a second defense. For the second defense, you need to further demonstrate your academic level and ability, and prove that you have the ability to finish your thesis and conduct research independently. Therefore, you should be fully prepared in the second defense, find out your shortcomings in the master defense and improve them in the preparation, so as to have a better performance in the second defense.