Zhang Chengyuan was lying on the bed in the dormitory, and his mind was full of these characters.

Who is it?

Who is Sun Pengcheng referring to?

At first, Zhang Chengyuan concluded that it must be the group that attacked him, but after thinking about it, he was not so sure. If it's that group, no one knows anyone, and Sun Pengcheng doesn't know either, how did he leave his last words? But after thinking about it again, if the murderer is someone he knows, why not just write his name? Yes, it must be that the name is too complicated, and he was already angry at the time, so he simplified it. But whose name is it with a bird and a branch? What does the homonym of y and CN refer to? Or ...... Or, could it be that I was in a panic and read the wrong message?

Wu Hao and Sun Pengcheng live in a dormitory, and he is destined to have trouble sleeping tonight.

As a roommate, he and Sun Pengcheng still have a deep relationship, although he doesn't understand Sun Pengcheng's recent behavior, but he wants to understand the reason more than anyone else.

"Y Bird CN Branch?" Wu Hao pondered for a long time, "It's not like a personal name." ”

Wu Hao pondered for a long time, and simply lay on the ground and began to hold his breath.

After holding it for more than a minute, Wu Hao felt that it was a little difficult to continue to hold his breath, and he began to draw those characters on the ground with his hands.

"Must represent five words!"

Wu Hao used his own understanding scene to reproduce Sun Pengcheng's situation at that time, and analyzed: "It must be to write five words, and when I write the first word, I am afraid that I will not have time to write it all, so I use pinyin instead, but after writing a letter, I feel that it must be difficult to understand all the letters, so the second word is simpler, so I simply wrote it." And maybe he didn't have the strength or maybe three or four words were more complicated, so he used letters instead. At the last time, there was still a little strength, so I finished writing again. ”

Thinking that Sun Pengcheng must have been in great pain at that time, Wu Hao couldn't help but have red eyes, gritted his teeth fiercely and said, "I must figure it out." ”

Wu Hao walked to Sun Pengcheng's bed, finally couldn't control his tears, and said in a deep voice: "Good brother, I will definitely help you find out the truth!" Who exactly is the murderer? Give me some inspiration! ”

The cold wind of the autumn night blew into the house, and the pile of books that Sun Pengcheng was spreading out on the bed was blown by the wind.

Among the trees are the "Botany" and "Animal Encyclopedia" that Sun Pengcheng borrowed from the library, as well as ......

That night in the dormitory, the conversation between the two surfaced in Wu Hao's mind again.

"You say, the biggest quadrangle. What is the carrying capacity of a wing helicopter? Sun Pengcheng asked Wu Hao.

"I'll go! Can you not think about these useless things? I feel like you're going to be obsessed. Do you understand the transfer function Rasfer transform, and start working on this again? Wu Hao asked rhetorically.

"You can't study all the time, you have to have some time to pass the time, right? Can't I even think about it when I'm having fun? Sun Pengcheng asked rhetorically.

"I'll go! If you do this, you will become a pure engineering man, give! Wu Hao said, throwing over a book.

"Holy! "Anthology of Ancient Poems Before the Tang Dynasty"? What are you giving me? ”

"Pack up your things and turn them out, you might as well look at this if you study that!"

"Damn! What is the use of the ancients? ”

"It's useless for the ancients to drag the text, but it's even more useless for you to study it......"

Wu Hao actually didn't like ancient poetry very much, he also casually threw out a copy of the waste book at that time, but now he saw that the book on Sun Pengcheng's bed was opened, and there was a bookmark sandwiched in it.

The book he gave Sun Pengcheng, Sun Pengcheng must have read it.

Thinking of this, Wu Hao's eyes couldn't help but turn red again, and he casually turned to the page where the bookmark was, which was one of the nineteen ancient poems of the Han Dynasty, "Xing Xing Xing Xing".

Just as he was about to close the book, a line in the poem caught his eye and made his whole body tremble.

- Humayi north wind, over the south branch of the bird's nest!

The south branch of the bird's nest

After standing for a few seconds, Wu Hao shifted his gaze to the other two books.

The two books "Animal Encyclopedia" and "Botany" are also bookmarked.

…………

As the campus calmed down again, the students gradually shifted their attention to revision, and no one wanted the upcoming final exams to be the end of their future.

Time is fair, and it doesn't slow down or go faster because of individual people's objections or expectations.

So although Zhang Chengyuan was not fully prepared, the final exam came.

The first subject is the foundation of engineering.

The moment the bell rang and the roll was handed over, Zhang Chengyuan's hands were cold, and his heart was even colder.

In the test questions, only the initial basic applied physics part and the qualitative open closed-loop system judgment questions he answered. Later, he barely moved a single item ...... the kinematic analysis, the calculation of the force deflection of the material, and the analysis of the second-order vibration frequency of the control system.

"If you fail, you will drop out of school directly......" Mr. Li's words at the beginning of the school kept echoing in his ears during the exam.

"Drop out, drop out."

For a former top student, he can't afford such a blow. However, when he handed in the paper, there was a large blank space on his rolling paper, and he had to face this result.

After handing in the papers, the students excitedly discussed the exam questions just now.

"Huh? What the? It's over, I directly used the moment of inertia of the rotating body to calculate! ”

"What? Is there a bending moment at the pivot? ”

"Ahhh You hang carefully! ”

"The teacher told me! The RC oscillation circuit formula can be used directly, no need to derive! You deserve to have missed the last question. ”

……

The students all left the examination room amid the noisy sound of theory, and Zhang Chengyuan walked at the end in despair. The words of these discussions undoubtedly deepened the irritation for him. He didn't even understand what the group was discussing. It is impossible for me to pass, and there is no suspense about dropping out.

Thinking about the mess this semester, maybe he is the only one, and dropping out of school by himself made Zhang Chengyuan desperate, but thinking that he left school, Ruan Xiyue and Leng Changhe would definitely be together without any suspense, and his aggrieved tears instantly burst out of his eyes.

At noon, Sun Wanyang accompanied Zhang Chengyuan to eat together.

"What's wrong? Didn't do well in the morning? Sun Wanyang cares about his roommates.

Although Zhang Chengyuan was frustrated, he was unwilling to show his vulnerable side in front of his roommates. He forced a smile and bowed his head to eat, silent.

Seeing that he didn't speak, Sun Wanyang didn't say anything more, and ate silently.

Zhang Chengyuan ate all the rice in the bowl and habitually took medicine.

Sun Wanyang frowned and looked away.

After this semester, the two got along quite tacitly, but there were always disagreements on the trivial matter of taking medicine. In order to avoid affecting the friendship between the two, the two stopped arguing about the matter later.

After eating, the two silently went back to the dormitory for a lunch break.

Zhang Chengyuan has never told Sun Wanyang the truth about taking medicine, because he is afraid that if it spreads, it will not have a good impact. But now, thinking that he is about to be dropped out of the school, he has no worries in his heart. He walked to Sun Wanyang's bed, who was about to take a nap.

"What's wrong?" Sun Wanyang sat up and asked him.

"Sun Wanyang, there is something I have decided to tell you now!" Zhang Chengyuan's expression was very resolute.

Sun Wanyang saw that his expression was sick, and nodded lightly.

"In fact, the drug that the school gave us is not a health care product at all, and the real name of this drug is - cancer cell division inhibitor." Zhang Chengyuan said seriously.

Sun Wanyang listened in surprise, his eyes shining.

"I was as surprised as you when I first learned the news. You know, the magnitude of radiation in Luqi City is very high. Do you know what is the greatest harm of radiation to the human body? Carcinogenic! In Lanqicheng, the incidence of cancer is particularly high, and in order to cover up these truths, the government often claims that Comrade XX has been transferred out of Lanqicheng due to work reasons. In fact, no one was transferred at all! They all died of cancer! The reason why we have to strive to go to the Pure Land is because. If you have been in Lanqi City, you will have to die of cancer sooner or later. And this medicine is used to delay time. It can inhibit the growth rate of cancer cells in the body, thereby delaying the onset of cancer. So, you must take this medicine! Sorry, sorry I just told you about this fact now! Because if the source of this news is leaked, it will have a very bad effect on me or my friends. But today, I failed the engineering foundation test today, and I know very well that I have no hope of going to the Pure Land. Sun Wanyang, you are a good person, so I must tell you about it, but I also hope that you will keep it secret for me! When Zhang Chengyuan said these words, his tone was quite sincere.

"Cheng Yuan......" Sun Wanyang's face showed the surprise that Zhang Chengyuan expected.

"Don't be afraid, that's the way it is, face it bravely! I just heard the news and was scared too! It's good to get used to it......"

"Nope! No! No, ......" Sun Wanyang shook his head in surprise, and he said in a heavy tone, "It's not what you said." Cheng Yuan, I, I also have a secret to tell you! ”