A spring that is long enough to almost jump a rope to observe standing waves, a special instrument that embodies light pressure, a blower that blows a tennis ball, a verifier for the conservation of angular momentum, and so on......

These interesting "toys" once again aroused the interest of the top students, and they watched with interest as the teachers performed on them.

On the eighth day, Lu Zhi, the head of the head of the school, informed everyone that there was a symposium in Yannan Park in the evening, which was about the principle of the new camera, and suggested that everyone go and see it.

The head of the head of the sect personally informed that everyone still complied, so they went to Yannan Park in a gang at night.

To say that Peking University at night is really very meaningful, everywhere is winding paths, a dim street lamp points to the forest path in the distance, and there are antique buildings on both sides of the path.

If it weren't for the cold weather, Wu Bin would still be willing to go out for a walk every day.

On the way, Jiang Hang and Zhao Kehan were discussing a mechanics problem in the morning, while Li Yan patted Wu Bin, who was still reading a new book, and asked, "Hey, how is your C language research?" ”

"Okay, I've been working on strings lately."

"Awesome."

"What's so awesome about strings?" Wu Bin looked puzzled.

"I mean, you've really been researching, physics alone isn't enough for you to have a headache?"

"Learn to play in your spare time."

"Awesome."

Li Yan gave a thumbs up and turned his head to join Jiang Hang and Zhao Kehan's discussion group.

Asked by Li Yan about C language, Wu Bin suddenly felt itchy, this week's schedule was completely filled with physics, and he didn't have time to read the basic C language books he specially brought, and he really missed it a little at this time.

Now Wu Bin has done several programming exercises on Mr. Huang's computer, and has completely gotten the fun of programming languages.

But once, when he suddenly remembered the pure robot that he had almost forgotten, he thought what if it couldn't understand C.

But in the end, I skipped the idea of 'whatever, learn it first, and then tune this robot when the time comes'.

When they came to the venue, Wu Bin and the others found that it was not only their training camp that came, but also a lot of students from Peking University, and the two sides looked at each other, and then greeted each other in a friendly manner.

Some enthusiastic people will come up to chat, after all, some of them have also been sent to Peking University through the competition, and they feel very cordial when they see Wu Bin at this time.

This is the first time Wu Bin has listened to the lecture, but he feels that something is wrong when he listens to it. What about new technologies? What about academics? Why is the main tone to introduce an optical institute in Shanghai?

"What's going on? What about the know-how? Wu Bin looked at Li Yan inexplicably and asked.

"I don't know if you ask me." Li Yan was also confused.

At this time, a Peking University boy in the back smiled and interjected: "This symposium, to put it bluntly, is the graduate admissions introduction of the Institute of Optics, mainly for us." ”

"Oh~" Wu Bin nodded, turned around and said, "Thank you for your doubts." ”

"It's okay~" The Peking University boy smiled heartily and continued to listen to the lecture.

Knowing that they couldn't learn new knowledge, Wu Bin and the others left the venue early after listening for a while, and at the same time found that the other students who came with them were already evacuating.

"I always feel like I'm being pitted to prop up the field." As soon as he walked out of the venue, a boy with glasses at the front sighed.

His name is Zhang Fu, and he has the highest score for Hu Nan in this competition, and he is also the most spicy!

Wu Bin once watched him eat fried crispy chili peppers as snacks, and he didn't know whether to say "MMP" in his heart.

"It's also a loss to know which direction to develop after learning optics." Gong Chengwei stretched his waist, turned around and proposed to everyone: "It's not good to go back to the study room so soon, why don't we go to Weiming Lake at night?" ”

"No, I'm going to the library."

Wu Bin waved his hand decisively, just kidding! Swimming in Weiming Lake on such a cold day and night, his face was probably numb after walking around the lake.

"Is it cold? I think it's okay. Saying that, Zhang Fu stretched out his hand and felt the wind, "It's not cold." ”

"Of course it's not cold for you to eat a few tons ......of chili peppers a day," Wu Bin complained, "Anyway, a few of us are going to go to the library for a while, why don't we meet in the study room at eight o'clock?" ”

"Okay." Gong Chengwei didn't intend to force Wu Bin and them, so he took the classmates who were interested in visiting the lake and left.

The remaining vote, who was afraid of the cold, followed Wu Bin and them to the library.

Riding to the library, Wu Bin pulled down his scarf and took a breath of cold air, and couldn't help but be impressed by the huge and somewhat ancient buildings in front of him again.

The library of Peking University is composed of the main library, the medical hall, 38 branch libraries and storage halls, with a total area of about 90,000 square meters, and the main library in front of Wu Bin accounts for more than half, a total of about 53,000 square meters.

On the third day, Wu Bin had a preliminary understanding of the library.

The entire Peking University Library has more than 11 million volumes of literature resources, including more than 8 million paper collections, and more than 300 domestic and foreign digital resources, databases, electronic journals, electronic books and other resources.

Professionalism and depth can be seen.

And when Wu Bin first came, he got all kinds of new postures, originally he thought that the university library had more professional literature or books than ordinary libraries.

But he was wrong.

Refer to the consultation to understand, any questions about the library will be solved for you in minutes, similar to Taobao customer service.

Literature search to understand, highly cited papers in the research field can be completed in minutes.

Knowledge Graph ...... Well, it's exciting to learn about the colorful visualization map.

In addition, there are a lot of advanced books, whether you are engaged in language, physics or something, you can always gain something here, and it is likely to be limited by Peking University.

So, there's a reason why so many people in college spend all day in the library, whether it's books or databases on computers, universities are the most professional.

……

On the ninth day, Wu Bin and the others ushered in a new professor, who was responsible for teaching...... Mathematics.

As soon as the professor from the School of Mathematics of Peking University entered the classroom, he looked like he was in a hurry, and came up to talk about DX, which is called infinitesimal displacement in physics and cotangent bundle in mathematics.

As he spoke, he suddenly slapped the podium angrily.

"Just give me a few lessons! How to finish it! ”

But the next day, as soon as the professor had been explaining the complex variable function for a while, he suddenly changed his style and began to tell his anecdotes, and he always felt like he had given up on treatment.

Of course, the teaching level is still leveraged, and the retention theorem and Laplace transform have given Wu Bin a new concept.

PS: The second update, it feels good to just write a book...... Should there be another chapter?