After eating in the cafeteria, Li Yang went back to the dormitory, and according to the direction in his memory, Li Yang returned to Yanyuan, which is the dormitory park where undergraduate students mainly live.

Li Yang's dormitory is in 618 houses, Building 16, Yanyuan, and there is no elevator in the dormitory building.

"Alas, climb it, it's only the sixth floor, and you won't be able to die today after you go up." Li Yang can only comfort his young heart like this.

When Li Yang climbed to the sixth floor out of breath and walked to the door of his dormitory, he happened to meet a person who came out of Li Yang's dormitory.

When Li Yang saw that person's face, he recognized him as the head of his dormitory, named Yan Chong, a top student in the Department of Philosophy.

Yan Chong saw Li Yang's gossip on his face, and said, "Hey, Li Yang, you're back, why is there a gift box on your table, it seems to be the kind given by a girl!" ”

"Huh? Box? When was it delivered, why don't I know? Li Yang replied to Yan Chong's words with a little doubt.

Yan Chong said: "Ah, don't you know? When I got back to the dorm room, I saw a gift box on your desk, and I thought you knew. Then you can go in and take a look.,Maybe the school girl who has a crush on it gave it.。 ”

Hearing this, Li Yang felt a little inexplicable, so he said to Yan Chong: "Okay, I'll go in and have a look, by the way, you go out now, do you have a class?" ”

"There's no class, it's just that I played a game before, and I told you about the three-body game, there is an offline party of three-body gamers tonight, I'm going to the party, by the way, do you want to go together, I can wait for you."

Hearing Yan Chong's words, Li Yang instantly came to his senses, thought for a while, and then said to Yan Chong, "I won't go, just got out of class, I want to rest for a while, you can go if you want." ”

Yan Chong replied: "Okay, then I'll go, don't leave me the door tonight, I shouldn't come back." After speaking, Yan Chong went downstairs.

"yes, okay."

Li Yang walked into the dormitory, there was no one else in the dormitory, looking at this slightly old four-room dormitory, and the date of May 23, 2006 displayed on the calendar posted on the door, some memories suddenly came to mind.

Before the crossing, he was also a college student, but he was a junior in the School of Humanities of Jiaotong University in 2019, but he didn't expect to travel to Blue Star, but instead became a student of North Star University, although the current time is equivalent to 2006 in that world.

"Huh? 2006？ I remember that Yang Dong committed suicide in 2007, which means that there is less than a year to go or Yang Dong will commit suicide next year. And Yang Dong's suicide means that ETO has really surfaced, and the three-body problem has begun to be known by the leaders of the earth, and they have begun to formulate corresponding plans. ”

"Then does it also mean that Tomoko has descended on the earth at this time and locked the earth's basic scientific research. Therefore, the current earth has been completely exposed to the vision of the Trisolarans. Thinking of this, Li Yang felt that there was not much operational time left for him.

Hey, Li Yang, who sighed, saw the gift box on the table, and then stroked the gift box with one hand, and sat on his stool by the way.

Li Yang looked at this gift box that was pitch black on all sides and covered with black and white stripes on the lid, and felt a little wrong, but he couldn't tell what was wrong.

Li Yang thought to himself, "Who can send me something?" Girl, it's impossible, besides, the gift from a girl can't be like this, who could it be? ”

"Forget it, no matter, open it and take a look, it's all reborn, why are you afraid of this."

So Li Yang put both hands on both sides of the gift box at the same time, and carefully removed the lid of the gift box. Slowly, the contents of the gift box gradually revealed their true colors, and it turned out that the gift box contained a CD and a letter.

Seeing the whole picture of Li Yang in the gift box, he suddenly felt a sense of relief in his heart, and then put down the lid of the gift box in his hand and picked up the disc. When I looked at it, there were no words on the disc and no logo.

Li Yang thought to himself, "Then I can only wait for some clues from this letter." ”

So, Li Yang picked up the letter placed at the bottom of the gift box and looked at it from all directions, there was no difference, except that the envelope said "Hello Li Yang!" "A few big words.

At this time, Li Yang didn't doubt it, he picked up the knife next to the table, opened the envelope, took out the letter paper, and read it word by word.

But the content of the letter is like this......

"Dear son,

Hello!

When you receive this gift box, you may have doubts and puzzles, which is normal. Forgive me for not saying hello to you in advance, so I took it upon myself to send you this gift box. In fact, the CD in the gift box contains the good times we had as a family and some information, since your mother died, I have taken care of you alone.

But it's a pity that I'm not a good father, and I always want to give you what I think is the best idea, the best thing, the best choice, but I ignore your feelings. I'm sorry, but since you were in high school, I spent more time and energy studying astrophysics, and I cared less about you, which is why you rebelled and chose a major you didn't like.

It turns out that Dad is a coward, and Dad doesn't have the courage to face you and the world when he fails.

I have spent almost a decade studying the basic rules in astrophysics, but unfortunately so far I have found nothing, and I have not only wasted the time that I could have grown up with you, but also wasted the many resources that the state has given me.

I'm sorry for you, and I'm sorry for the country. When you read this letter, Dad, I'm gone, and I'm cowardly and afraid to face the reality of failure, I hope you can forgive me.

The information part of the CD-ROM is my experience in astrophysical research in my life, a total of two copies, and the other one was given to my colleague Yang Dong.

It's not my dad who wants you to study astrophysics, there's nothing left to study, I just want you to understand that dad's life was not wasted.

After I leave, you are the only one left in the family, I hope you can be strong, I hope you can live well, and I hope you can pursue your freedom and dreams.

Son, Daddy is sorry for you......

Love you daddy"

After reading the letter, Li Yang couldn't accept it, even if he was reborn, even if he hadn't seen this father, even if he ......

But the residual memories still made him a little sad. But soon, Li Yang pulled himself back together, and Li Yang thought a lot.

The first thing is to go to the place where my father works and bury my father. Secondly, Li Yang believes that "my father is an astrophysicist, and he has not been able to have breakthrough research for a long time, so he chose to commit suicide, so it means that now Zhizi has locked up the basic scientific research of Blue Star." ”

"My father committed suicide, so it is not far from the time of Yang Dong's tomb in the opening of the three-body problem, that is to say, Yang Dong is also about to commit suicide, so in this process, Yang Dong will find out the identity of Ye Wenjie's ETO organization leader."

“……”