"Ladies and gentlemen, it is an honour to have such an opportunity to stand on this podium and introduce to you some of the mathematical, physical and chemical problems that I am currently working on. I would like to thank the University of Pennsylvania for its generosity and openness, and Professor Ham, a renowned engineering expert on Pennsylvania's Faculty Council, for giving me such an opportunity. In addition, I would like to thank Professor Porter for his introduction and support, thank you! ”

There was a round of applause from the audience, and a few young or old scholars in the applause bowed slightly to the surroundings, as a gesture to Junxin to mention himself.

Junxin's dress is still very casual, he didn't feel constrained because this is a solemn academic shrine and changed into formal clothes such as suits, he is still a gray coat, which looks somewhat different, but when the people on the scene came into contact with his eyes containing wisdom, they couldn't help but be impressed by his bearing.

"When Professor Porter invited me to talk about my research work to everyone here a few days ago, to be honest, I was a little nervous, because I felt that I was just a sophomore in my undergraduate year, that is, the level of a sophomore in the American academic system, but I had to report to a group of senior students, even some graduate students, doctoral students, etc., and frankly, I was under a lot of pressure."

"Someone might say, didn't you give a talk at the Princeton University Mathematicians' Conference? Indeed, I have done a special report on the modle conjecture. However, this lecture was different from the previous ones, and the Model conjecture was a mathematical problem, and mathematics is my professional discipline, or my profession is a mathematician, and there is no pressure to give such a lecture. But what I would like to report today is not my own work in mathematics, but the physics problems that I have recently been working on while working on mathematical problems with Professors Witten, Strominger, and Candela of Princeton University, as well as my good friend Mr. Horowitz, who is currently a postdoctoral fellow at the Institute for Advanced Study in Princeton. So, today's speech is really stressful for me. ”

"Okay, that's all for small talk, let's get into our topic, what am I going to talk about today? I have been thinking about this question since Professor Porter invited me, and after my detailed consideration, I decided that the topic of this lecture should be the most basic problem of physics, that is, the unified field theory that Mr. Einstein had been working on in his later years. ”

After a pause, Junxin said: "What is unified field theory, I think everyone here has a deep understanding of the concept of this term, but here I will talk about my understanding of the concept of unified field theory, that is, the fusion of quantum mechanics and relativity theory of unified mechanical theory. ”

"It has been 80 years since the black-body radiation extended the famous quantum mechanics and from the aether drift to the famous theory of relativity. Of course, we are aware of the contradictions and incompatibilities that characterize these two theories. However, the pursuit of a unified mechanical theory between the two is the goal that people have been striving for since the birth of the two theories, especially in the physics community after the Second World War, which regarded this problem as the fundamental problem for the development of physics, and thus derived a large number of various relatively single or relatively complex theories. For example, quantum color dynamics with strong interactions are explained, and there are others such as Bose string theory, supersymmetry, and so on. ”

"Recently, my work has been the same, but my approach is to start from the mathematical aspect, so as to use mathematical methods and various models to construct a new mathematical physics model that can explain the four interaction forces under the unified field theory, that is, the theory constructed by the articles published in the Physical Review Letters during this time, because this theory integrates the Bose string theory and then integrates the concept of supersymmetry, so I call this theory superstring theory. Next, I will give you a detailed description of the basic principles and mathematical expressions in superstring theory, as well as some inferences and problems encountered in the case of assuming that superstring theory is true. ”

After a round of warm applause, Junxin sorted out his thoughts and began to introduce superstring theory: "Let's start with the expression of Euler's β function, the basic idea of Bose string theory can be explained by the expression of the equation of this function and the solution of the equation, Euler ...... in his function"

Obviously, this problem is perfectly feasible when it comes to explaining strong interactions, but it does not solve the graviton problem. Based on this situation, Professor Schwartz et al. of the University of Southern California proposed a fusion with the supersymmetric model, so as to change the expression of Euler's β function to the following form: ......"

"This theory comes from the opposite direction of Mr. Einstein's thinking, so it starts to extend from quantum mechanics, so what needs to be solved is the graviton problem, which I adopted some time ago, in an article published in the Physical Review Letters in September this year...... Solved the problem with gravitons..."

"However, according to the quantum defect field problem completed by Professor Yang Zhenning and Mr. Mills, this set of equations is still imperfect, because it does not solve the anomaly problem, so I have modified this system of equations as follows......"

"For the modified equations, you can see this recent article published in Physical Review Letters, which has a very detailed description."

"An explanation of the problems related to this theory, such as the question of a number of problems and assumptions changed in the case of closed strings, the paper I co-authored with Professor Schwartz can be found on pages 60 to 68 of the first issue of Physical Review Letters last month, in the ...

"As far as the need for stable latitude explains the space we are in, I recently completed an introduction with Mr. Horowitz on Professor Yau's Calabi-Yau manifolds and curled extra dimensions, and this article will be submitted to the Annals of Mathematics, and there will be a more detailed introduction at that time, so I will explain his content first..."

………

"My view of supersymmetric string theory, which I call superstring theory, is that this is a part of the physics of the twenty-first century that fell into the twentieth century." Junxin finally said in a sentence from Professor Witten.