Early the next morning, Liu Shiyu sent a text message to Ma Yifan.

"My dad came out of the operating room this morning and the surgery was a success. There were too many people yesterday, I didn't care about it, and I found out that you were gone in the middle of the night, and I didn't have time to say thank you to you!"

Ma Yifan replied: "You're welcome!"

Putting down the phone, Ma Yifan's mood was a little more relaxed for no reason. Putting aside the bad things of the Liu family for the time being, he still has a lot of things to do this day.

In the morning, there was a lecture by an economic bull in the west building of the teaching, and he had to listen to it. In the afternoon, there was a basketball game in the School of Economics, and their class played against the junior finance year.

Coincidentally, when listening to the lecture, I actually met Xia Dongdong and Xu Fang.

Xia Dongdong seems to be very afraid of the cold, and Jinling has not come when it is the coldest, so she is wrapped like a zongzi, a hat and a scarf. shouted Ma Yifan from a distance outside the classroom, and Ma Yifan recognized her for a long time.

Being able to meet Ma Yifan here made Xia Dongdong very excited: "Are you also coming to listen to the lecture?"

"Well, let's join in the fun!"

Ma Yifan replied lightly, and nodded to Xu Fang beside Xia Dongdong, which was regarded as a greeting.

"Me too, I've been paying attention to Professor Jin for a long time, and last week I heard that he was coming to Jiang University to give a lecture, and I didn't sleep all night when I was excited!"

"Huh!"

Ma Yifan's hehe did not stop Xia Dongdong's desire to speak, and he chattered in Ma Yifan's ear like a little yellow bird, until Xu Fang called the two to enter the arena.

Xia Dong Dong moved quickly and quickly occupied three positions in the front row. Ma Yifan actually doesn't like to sit in the front, because if he thinks that the person who started the lecture is not good, he will leave the venue after listening to it for a few minutes at most. Of course, it's better to leave halfway through the game near the back door. But today, in the face of Xia Dongdong's kind invitation, Ma Yifan had no choice but to sit beside her.

Today's lecture is Professor Jin Shizhong of Xicai, who is an Internet celebrity on Weibo, a public intellectual, who often posts some words criticizing the government and the system, so he has won the hearts of the people and has many supporters.

It can be seen that Xia Dongdong is indeed a great admirer of Jin Shizhong, and he deliberately took out a notebook to take notes.

The lecture began at nine o'clock, and it was a quarter past nine o'clock. The real person looks greasy than the photos on the Internet, wearing a nylon velvet suit, long round piers, to be honest, this image is a bit treacherous, not like everyone who asks for the people's lives!

The title of Jin Shizhong's speech today is "My Road to Economics", which is a bit autobiographical, mainly about how he came out of the countryside and became such a beloved economist step by step today. After all, I am giving a speech in a university, and topics such as housing prices and inflation that are closely related to everyone are a little sensitive, and inspirational things are more suitable for these fledgling young people.

Jin Shizhong is quite humorous, and he can make a joke when he talks about it, which makes everyone laugh, and the atmosphere is very good. Xia Dong Dong will also record it from time to time, Ma Yifan doesn't know what to remember about these contents. In fact, he wanted to leave after he finished talking about his college entrance examination in Jinshi, and praising himself too hard is sometimes a kind of boasting, which is boring.

It's just that his seat is right under the nose of Jin Shizhong, and there is a row of academy leaders sitting in the front row, and he is really embarrassed to go first.

Then listen, halfway through it, Ma Yifan heard that there was a problem.

It may be that Jin Shizhong thinks that it is boring to talk about his personal experience and deliberately show off his skills, so when talking about his college days, he said that he used the theory of dynamic equilibrium and mathematical statistics to create an efficiency model in his sophomore year, and then gradually improved it after years of optimization design, and won many economic awards at home and abroad.

The so-called multiple economic awards are actually just awards at some Yeluzi economic forums at home and abroad, without official endorsement, and have no practical significance.

In the past, Ma Yifan often heard that there were no real economists in China, and he felt that this was a bit too heavy, but when he saw such water in the golden stone in front of him, he realized that this was not false.

Hearing this, Ma Yifan knew that he had to go, and if he didn't leave, he might not be able to help but jump up and refute this Professor Jin.

"I have something to do, so I'll leave first!" Ma Yifan whispered to Xia Dongdong, and inadvertently looked at the other party's notebook and remembered it densely, and sighed in his heart.

"Oh, that's not good, everyone is listening, you wait!"

"Don't wait, can't sit still!"

Ma Yifan smiled apologetically at Xia Dongdong, stood up and walked out. Because the position was too far in the middle and there were too many people in this lecture, Ma Yifan had to whisper over and over again to borrow it, and squeeze it out little by little.

Along the way, it caused a lot of commotion and the opinions of the masses, and Jin Shizhong on the stage also saw this scene, cleared his throat, and said: "It seems that what I said is not exciting enough, some students are about to leave the venue halfway!"

Jin Shizhong's words made the eyes of the audience turn to Ma Yifan, and the college leaders in the front row also turned their heads, and several big leaders were displeased, obviously thinking that Ma Yifan's behavior was very impolite, which made Jiang University School of Economics embarrassed.

Ma Yifan scolded in his heart, and when he saw that the oily head and flour in this golden stone were very angry, he stopped at the moment and said loudly in front of the teachers and students in the classroom: "Professor Jin, why am I leaving, don't you know it in your heart?"

"Oh!?Listening to the meaning of this classmate's words, it seems that he has some opinions about me, why don't you say it, do you have an opinion about me as a person, or do you have an opinion about what I talked about today?"

"Okay, then I'll talk about it!" Ma Yifan also cleared his throat as he looked like Jin Shizhong, and said, "Professor Jin's definition of efficiency seems to be based on the Boretto optimal design of static analysis, and there is no concept of dynamics and nonlinearity, so I don't know what kind of guidance Professor Professor's model has for the real economy?"

Jin Shizhong was stunned for a moment, obviously he didn't expect an undergraduate student to ask such a professional question, but he had a lot of experience in major economic forums, and immediately replied: "This student's question is very professional, very good, has his own thinking, I appreciate it! Then I will answer your question, the efficiency definition of Borreto optimal is not only applied to static analysis but also to dynamic analysis." If we treat the commodity at each point in time as a new commodity, the dynamics become static, but the dimensionality of space becomes larger!"

Ma Yifan smiled and said unhurriedly: "Teacher, you are deliberately avoiding my question! I am not just talking about static and dynamic, but linear and nonlinear static and dynamic analysis! There is no economic data in your model, all the design is based on the rational environment under the premise of assumptions, and what you do is economic mathematics, not economic science!" In fact, the best way to test the design of the model is to apply the existing economic data, you can try it and see if there is any economic data for which year and which country can prove your model!"

The audience held their breath and condensed, so quiet that they could even hear the sound of a needle falling to the ground. Ma Yifan stood for a while, saw Jin Shizhong's face on the stage was ugly, and he didn't seem to know how to answer himself for a while, so he smiled disdainfully, squeezed through the crowd and left the classroom in a chic manner......