Under the sunset, Sun Pengcheng looked at the sky intently.

A delicate hand swayed between him and the sky.

"What are you doing?" Chen Jiatong saw that Sun Pengcheng did not react because she stretched out his hand, so he retracted his hand and asked.

"A flock of birds." Sun Pengcheng said while looking up at the sky.

"You're so calm! It's almost the end of the semester, and everyone is preparing for the final test. Chen Jiatong said as he looked at Sun Pengcheng's line of sight.

"Damn, please don't be dark!" Sun Pengcheng said with a sincere smile.

A flock of small birds turned into beating black dots in the air, and flew from right to left in the afterglow of the setting sun.

"The sunset is infinitely good, but it's just near dusk." This is the first sentence that flashed in Chen Jiatong's mind after seeing this picture, and then saw Sun Pengcheng's intoxicated demeanor, very disdainful, and said: "In my impression, only the old man will look up at the sunset, infinitely emotional. You're young, and you're a fart! ”

Sun Pengcheng turned his head and glanced at Chen Jiatong blankly. This girl kissed him unexpectedly when she met him for the first time, and she never said a second sentence since. And this kiss mark has always been branded in Sun Pengcheng's heart, lingering. He is not good at expressing his feelings. If it were someone else, he would definitely ignore it, but when Chen Jiatong said this, he couldn't help but explain the reason.

"Classmate, let me tell you what this is, I have discovered an amazing secret!" Sun Pengcheng's eyes widened, and he said to Chen Jiatong with a very serious expression.

"What's the secret?" Chen Jiatong asked angrily.

"Yesterday, a flock of birds hovered in the sky for a while and actually landed in the tree of our departure school." Sun Pengcheng looked very excited.

Chen Jiatong looked disdainful.

"I was sitting under a tree, so I noticed the birds." Sun Pengcheng continued.

"What are you doing sitting under a tree when you're fine? Do you think you're a Newton? Or Shakyamuni? Chen Jiatong continued to sneer.

Sun Pengcheng ignored her sarcasm and continued: "I was surprised to find that these birds are not sparrows, nor are they crows. ”

Chen Jiatong turned his face away, already a little disdainful to listen.

"I went back to the library last night and checked, and if I'm not mistaken, the birds are supposed to be red-footed falcons! So I want to make another confirmation today. ”

"Compared with sparrows and crows, isn't the name of the red-footed falcon a little longer, what's so strange......

"Shh!!h Sun Pengcheng motioned for Chen Jiatong to be silenced.

I saw the group of black dots just now circling down, resting on the big tree not far from them.

Sun Pengcheng stared intently at the bird in the tree, turned his head and said, "Now I can be sure, to put it mildly, the world we live in may be different from what we think!" ”

"What do you mean?" Chen Jiatong was about to lose her patience, but she still asked patiently.

"It's not uncommon for us to see sparrows and crows, but it's very strange to see a red-footed falcon!"

"Speak human words!"

"Sparrows and crows are resident birds. However, the red-footed falcon is a migratory bird. ”

"Resident birds, migratory birds, what do you mean?"

"A resident bird is a bird that lives in one place all year round. Migratory birds, on the other hand, refer to migratory birds. ”

"Migratory birds...... What's wrong with it? ”

"After the Doomsday meteor shower, most of the forests have disappeared, and only the Pure Land remains. But if this were the case, it would be impossible for migratory birds to reproduce. Migratory birds have to have forests all the way to migrate, or at least, at least to tree-dwelling places. The Great Khing'an Mountains are gone, and there are only a few trees in the Northeast City, how can there be migratory birds passing by? Unless the Pure Land is close to us! ”

"You're thinking too much. How do people migrate, what does it matter to you? ”

"Nope! This shows that there must be trees outside the high walls of the Sailing School, many trees, enough for this group of migratory birds to rest along the way. Otherwise, it means that the Pure Land is very close. I want to step out of the walls and see what the world looks like out there. ”

"You've been living in the city for so many years, don't you know what the outside world is like? Nothing! ”

"It's all in books and on TV. In fact, none of us have ever stepped out of the military boundaries of the city, and none of us have seen it with our own eyes. I wonder if the outside world is what it says on TV. I'll go back tonight to check the redfoot falcon's migration route. We know that the Pure Land is an island. If the red-footed falcon is a lateral migratory bird, then at least it proves that the Pure Land is in our East China Sea, or Southeast China Sea. If that's not the case, then I think there's a problem. ”

"You actually question such objective facts, you are not sober-minded!"

"No, I'm sober. Where did these trees on our campus come from? ”

"Didn't Mr. Lu talk about it all? It was airlifted from the Pure Land. ”

"I've done the math that these trees weigh more than 10 tons on average, and to transplant a tree of this size you have to transplant it along with its roots and root soil. I suspect the trees weren't airlifted at all. ”

"What do you mean?"

"I dug a deep pit some time ago, and the roots of these trees extend very long in the ground, and these trees should have been growing here all along, if I guessed correctly......"

"These trees have been airlifted for many years, so it's normal for them to grow like this!" Chen Jiatong didn't bother to argue with him anymore, waved his hand, and turned to leave.

…………

As time passed, the students of the school continued to grow.

And Zhang Chengyuan is having a bad time.

The experience of being attacked last time left a shadow on his mind. And the estrangement between Ruan Xiyue and him seems to be getting deeper and deeper.

Ruan Xiyue seems to be becoming more and more mysterious, every day when she is not in class, it seems that she can't be found, and the only time in the world of two people every night is no longer so beautiful.

Zhang Chengyuan seems to be carefully caring for an increasingly fragile relationship. He hadn't explained to Ruan Xiyue about the last time he and Chen Jiatong were raided together, and he had a clear conscience, so he didn't want to explain, but he wasn't sure if Ruan Xiyue had a bad idea about it.

Cheng Yuan felt that in this love, he changed from the initial happiness to exhaustion.

But although he was tired, he would never let go.

However, his state is really not good. His grades in all subjects began to decline across the board.

A semester is coming to an end. His grades were terrible.

When the class teacher began to teach calculus in the basic engineering class, it was also the time when Zhang Chengyuan and Ruan Xiyue had a relationship estrangement, and it was difficult for a young man who fell in love with his first love to invest in his studies.

Calculus is a threshold in the knowledge points of basic engineering courses, and it is the leap from elementary mathematics to advanced mathematics in engineering application principles. Zhang Chengyuan stumbled here.

In the basic engineering class, the teacher is explaining the Fourier variation of the function and the time and frequency domain curves of the signal. The wonderful thing is that Zhang Chengyuan can understand every word written on the teacher's board book and understand every word the teacher says, but he can't understand the meaning of the connection at all. Zhang Chengyuan turned his head to look around at the classmates around him, Sun Wanyang nodded his head frequently and lightly, and the communication with the teacher deeply stimulated Zhang Chengyuan. In less than a semester, the aura of a scholar on his head disappeared and he became a veritable scumbag.

Since elementary school, his grades have never been bad, and no matter how difficult things are, he can keep up at once, but he never thought about it, but he just fell behind a little when learning calculus, and then he couldn't understand the Fourier transform in theoretical mechanics, material mechanics, engineering control foundations, and signal processing.

All this made him feel discouraged and inferior. So much so that by the time he found out that he had fallen behind in his schoolwork, it was already difficult for him to catch up.

In fact, he didn't know that the amount of learning tasks in Qihang School was far more than that of junior high school and primary school, and compared with junior high school and primary school, his current life was too leisurely. Every night when other classmates are struggling to study, he is the only one who spends a lot of time on the relationship between men and women.

He couldn't devote himself to the fighting class. Because his partner is Chen Jiatong, every time he sees Chen Jiatong, he thinks about whether Ruan Xiyue will misunderstand him, and then he rejects him. So much so that after a semester, in the fight project, Zhang Chengyuan's absolute lead over Chen Jiatong has also weakened.

Zhang Chengyuan became a lonely boat that lost its sail in the bitter sea of love, passively floating on the sea, pushed by the waves of time.