After Cheng Jin and the others finished seeing Zhao Zi, they went to see Si Buming. Han Bin also knew Professor Si, but he was not as familiar with Zhao Zi.

After they came to Si Buming's office and explained their intentions, Si Buming received them warmly. Si Buming is different from Zhao Zi. Zhao Zi is an academic and devotes himself to learning, while Si Buming is good at managing interpersonal relationships. He is now the vice president, and it is said that he is very likely to take over after the dean retires.

Si Buming's face was very heavy, "Song Qiyuan was a good student who was friendly and excellent in studies. I can't figure out how this kind of thing happened to him. Why him?"

"Professor, was Song Qiyuan's stomach medicine also prescribed at Huiren Hospital?"

"I don't know about this, but it should be."

Cheng Jin asked some more questions, and he found that Si Buming often glanced at his cell phone when answering the questions. He remembered one thing: when they came over just now, Si Buming was on the phone, but he hung up immediately after seeing them.

Cheng Jin casually glanced at You Duo next to him and then said in surprise, "You Duo, what's wrong with you? Why do you look so bad?"

You Duo's face was pale, and he was on the verge of falling. Han Bin rushed to help him. He slid onto the ground like he was in weightlessness, causing Han Bin to stagger.

Cheng Jin hurriedly said to Si Buming, "Professor, please help me find out what's wrong with him."

SI Buming was also startled, so he hurried over and checked quickly: "This symptom... he should be sent to the emergency room as soon as possible!" Si Buming couldn't see the symptoms for a moment, but he saw that the whites of You Duo's eyes were turning up, and he was about to foam at the mouth. He looked out of breath; he was also anxious, and he immediately wanted to find a colleague for help, but You Duo clung to his sleeve like a life-saving straw.

Han Bin also urged: "Professor, where is the infirmary? We have to send him there quickly."

"Yes, come with me!"

Si Buming and Han Bin hurried to the infirmary, carrying You Duo.

Cheng Jin hurriedly walked to Si Buming's desk, turned on his mobile phone, and quickly recorded the recent contacts. After thinking about it, he simply took off his mobile phone card and copied a copy of the address book onto his mobile phone.

Then he looked around and saw a magazine on the table, which should have been flipped by Si Buming not long ago. He opened it casually and found that a page was folded, so he looked carefully. There is an article on this page, and the author is Song Qiyuan. He took a picture of the cover of the magazine with his mobile phone, and when he heard someone approaching outside, fearing that Si Buming was back, he hurriedly restored everything and then walked towards the door of the office.

However, when he walked near the door, he found that it was a strange teacher.

He smiled and said, "Teacher, do you know where the infirmary is? Professor Si took my colleagues there just now, and I want to find them."

Wei Qing's face turned blue, but he still held back and said nothing.

Bu Huan was still driving when they went back. He hoped that someone would take the initiative to drive, but unfortunately, no one was considerate.

Yang Simi handed the tape to Cheng Jin.

Cheng Jin took it and said with a smile, "It's fine to let Bu Huan do things like take the tape; why are you going?"

Bu Huan: "..." He is working as a labourer and a foil today.

Yang Simi looked at Cheng Jin innocently: "You said you wanted to listen to what we performed."

Cheng Jin smiled, "Yes. Let's go back and listen."

A few hours later, You Duo woke up on the bench in the office.

When Xiao An saw it, she ran over and asked him, "Are you hungry? You missed lunch, but we packed it for you. Would you like me to warm it up for you?"

You Duo looked at his watch; it was already 6 o'clock. "No need; let's have dinner together later." He sighed, "It's the first time I've been sedated." It was also the first time he slept on an office chair for hours under the noses of dozens of people, and he didn't want to sit here alone to eat during working hours.

Bu Huan came over: "Boy, there is a first time for everything."

"So, is there any progress now? Where's Cheng Jin?" You Duo looked around, but he didn't see Yang Simi.

"They went to Liao Shixin's house; we finally have a suspect!" Xiao An answered him.

Si Buming said that this was a very common thing, and he didn't think it had anything to do with the case, so he didn't tell the police. In addition, he said that he knew about Song Qiyuan's thesis. He said that Song Qiyuan had real talent and learning, but this young man didn't like to be in the limelight and had never gone out to publicise it, so not many people knew about it.

Wei Qing asked someone to ask Song Qiyuan's girlfriend, Guo Lei, but like other students, she didn't know about the thesis.

They also went to Hong Fei, but they couldn't get in touch yet. He recently went home on leave. Like Song Qiyuan, he also applied to a foreign university and received an admission notice. He will go abroad after a while.

They also launched a series of investigations around Liao Shixin.

They checked the records of books he borrowed in the last year and found that there are many books on toxin research and many books related to "Song Qiyuan's papers". They also learned from other professors that he had indeed done some research on toxins and had also done many experiments that seemed to have a causal connection with "Song Qiyuan's paper".

At present, there is no clue that Song Qiyuan has read those books or done those experiments.

Regarding Liao Shixin, he is from this city, and his family is a very ordinary family. What is unusual is that two months ago, the taxi his parents were in was involved in a car accident.

It was late at night, and the taxi they were travelling in was hit by a giant coil of steel wire about 1.5 metres in diameter that rolled down from the truck. The driver died on the spot. Liao Shixin's parents were seriously injured and spent several days in the intensive care unit of the People's Hospital, but finally died on October 6.

Wei Qing once again sent people to question the staff of Huiren Hospital, this time about Liao Shixin. Someone provided a clue: Liao Shixin had appeared in the hospital on October 11 and 13.