That's definitely not easy. After all, the thesis is based on a lot of knowledge reserves, as well as thesis defense and so on. It's stressful. It is very good that the thesis defense can reach an excellent level. I also graduated from the self-taught exam. At that time, I took part in the self-taught examination under the guidance of teacher Peng Zhong, and the thesis was really not easy. I was scratching my head when I was writing a paper. So it's not easy.