After the wheat fields in North America initially helped relieve Wang Miao and Ding Yi of their confusion about the future, Li Yang and Wang Miao returned to the North Star under the protection of Shi Qiang.

After arriving at the North Star, Li Yang went home on his own to rest for a few days, and then went to the school to find Luo Ji, who had not been looking for him because of the International Joint Conference, and now Li Yang didn't know if Luo Ji had communicated with Ye Wenjie, and whether Ye Wenjie had taught him those two axioms.

Li Yang chose Wednesday afternoon, and it happened that Luo Ji had a sociology class on this day, so Li Yang chose to go directly to the classroom to find him, after all, he was also a student of North Star University, and he also had some military and police relations, so he knew where Luo Ji was.

Sitting in the audience and looking at Luo Ji, who was still talking, Li Yang couldn't help but think of the scene when he just crossed over, which was also in Luo Ji's class, but who knew that in less than a year, so many changes had taken place.

Indeed, Luo Ji's chic posture attracted Li Yang, who was looking at him at this time, "Perhaps, he hasn't changed much!" ”

Luo Ji, who was lecturing on sociology on the podium, also saw the student sitting in the back row, the student who had contact with Yang Dong, the student who personally gave him Yang Dong's contact information, and the student who could be said to be the last contact between him and Yang Dong. Luo Ji was very impressed by him, and he still remembers that his name is Li Yang, and he is a sociology student who studies well.

The time for class passed quite quickly, and after a while, the bell rang for the end of class, and when the students in the classroom were almost gone, Luo Ji, who was packing up his things, raised his eyes and saw that Li Yang had not left yet, and was looking at himself with his arms crossed, and he understood that this guy wanted to talk to him.

After packing up his things, Luo Ji took his backpack and walked down the podium to the place where Li Yang was sitting, and said as he walked:

"It's been a long time, I see that you haven't left after class for so long, do you still have questions for me?"

Seeing Luo Ji walking up, Li Yang, who was sitting at the back of the lecture hall, also stood up, "I don't want to ask you questions, I just want to talk to Professor Luo." ”

"Talk? What to talk about? Why don't you go out and talk while walking? Luo Ji stood next to Li Yang's seat and motioned for Li Yang to go out for a walk.

"Okay, I'll do it, then, Professor Luo, let's go."

"Good!" So Luo Ji took the lead and walked around the garden of North Star University with Li Yang.

"It's been half a year since the two of us first talked to each other, and a lot of things have happened in the past six months, Yang Dong, who I introduced to you, has passed away, do you know this?"

"Professor Luo, I know what you said about Professor Yang's death, I not only know about Professor Yang's death, I also know why she died, and I even know who is behind this.

I've experienced a lot in the past six months, and I'm even dissatisfied with you saying that I've experienced life and death, and I want to come back to you to talk about it again.

Confucius said, three people must be my teacher, you, as an astronomer and sociologist in contact with our country, I can gain a lot by chatting with you, so I came to you. ”

"It's hard for me to imagine being able to say something like life and death from the mouth of a college student, I don't know what you've been through, but I think I can be a listener and answer some questions that I know."

"Teacher Luo, I can take the liberty of asking, what is the relationship between you and Professor Yang Dong, it should not be a simple high school classmate relationship?"

"Me and her, seriously, I used to like her in high school, she was the goddess in my heart then or still is, but unfortunately I can't get together with her, personality determines all this.

But I don't regret it, because I'm a waste compared to her, I'm not as pure as her, I'm not worthy of her, and now that she's gone, I think she's going over there to pursue her dream of physics. ”

"Teacher Luo, maybe there is really a little bit of fate between you, but it's a pity that you guys are so sorry. By the way, that Teacher Luo, that Professor Yang, have you seen her mother, just recently. ”

"You're talking about Professor Ye Wenjie Ye, I met her when I went to visit Yang Dong's grave some time ago, she was not in a good state at that time, you ask this, what's wrong?"

"Oh, it's Professor Ye who passed away and was buried next to Professor Yang Dong, if you want to see them in the future, you can buy a bouquet of flowers for Professor Ye by the way.

And I've been working on something about the universe recently, and I know that Professor Ye is also an astronomer, so I don't know if she told you anything about the astronomy of the universe when you two met. ”

"You said that Professor Ye died, this, I didn't expect her to die so soon, probably because of her daughter's death. As for the one you asked, did she tell me anything about cosmic astronomy, and she did.

When Yang Dong met with Teacher Ye in front of the tomb, she told me that she wanted me to create a discipline called Cosmic Sociology, which is to assume that there are thousands of planets with civilizations in the universe, and what kind of relationship and what kind of communication relationship between these civilizations and civilizations exist on the planets, Professor Ye wants me to study this, that is, to study cosmic sociology.

In fact, in my opinion, cosmic sociology is very different from human sociology, and the key to human sociology is actually to study and solve social problems, while cosmic sociology does not know whether there is such a civilization at present, and what kind of civilization exists in the universe.

I don't even know if there is a certain civilization that exists in the universe whether it is carbon-based or silicon-based, or other beings, we don't know what their thinking patterns are, we don't know everything, we just know where we are.

So in my current opinion, this cosmic sociology is quite difficult, but Professor Ye told me two axioms, which I think are very reasonable: first, survival is the first need of civilization; Second, civilization grows and expands, but the total amount of matter in the universe remains the same.

There are even two keywords, the chain of suspicion and the explosion of technology. These are all things that Professor Ye told me, and I have been thinking about it a lot in the past few days, but I haven't come up with anything so far, I hope these can help you. ”

"Okay, thank you, Mr. Luo, I have talked with you for so long and gained a lot, thank you.

By the way, Mr. Luo, you should watch the news, the three-body problem really exists, which means that cosmic sociology is worth pondering, and I also suggest that you establish the discipline of cosmic sociology.

Last but not least, stay safe when traveling! ”

After speaking, Li Yang looked at Luo Ji deeply, then said goodbye to Luo Ji, turned around and left, Li Yang planned to start the wall plan.

……