Wu Tongguang looked at the ceiling again, and there was a chandelier in the shape of a yellow carving on the ceiling, which was very classical, a bit of the Nordic style. With the chandelier as the origin, about half a meter in the direction of the window, there is a roof beam, and under the beam is a sofa. The dust on the window edge is a little blurry, and the traces that Professor Zhu has pressed are still on it, presumably one hand pressing the window edge and the other hand to close the window.

Wu Tongguang walked to the corpse and examined it carefully, Professor Zhu did not have any external injuries on his body, nor did he have any traces of struggle, and he still held a small roll of fine hemp rope in his hand.

"Where did this hemp rope come from?" Wu Tongguang asked Wang Nianru.

Wang Nianru said: "It was used by Professor Zhu when he gave a lecture, and he talked about mechanics today, and he told me to prepare this rope, and he wanted to demonstrate it to the students." ”

"Oh? What demonstration can this rope do? Li Wutong asked.

"I don't know, I'll ask the students later, they should be able to find out what it's for." Wang Nianru replied.

Wu Tongguang said: "You said that you just saw a student see Professor Zhu enter the lounge?" ”

"Yes, Professor Zhu's lectures are humorous and funny, and he has always been very popular with students, and every time he leaves class, students will chase after him and ask questions."

Wu Tongguang looked at his watch, the time for the next class was about to pass, and he ordered: "Hurry up and let those students who are chasing after them ask questions, remember, you must call over quietly, and don't leak the news." ”

The guard whispered, "Could it be that the professor had a heart attack?" ”

"Professor Zhu has a heart condition?"

"Sir, many people in the school know that he has a heart attack, once he came in from the school gate, suddenly had a heart attack, and I also helped send him to the hospital once, and the doctor in the hospital said at that time that his illness is easy to cause sudden cardiac arrest."

"Oh...... That's right. You go find an empty classroom first, and I'll ask the students who have just met Professor Zhu. Wu Tongguang didn't seem to pay any attention to Professor Zhu's heart attack, and continued to check Professor Zhu's body.

When the guards heard this, they went out to find an empty classroom.

Wu Tongguang and Li Wutong stood in the lounge, and there was nothing superfluous in the entire lounge. Wu Tongguang walked around the lounge again, this lounge was so normal that he couldn't find anything wrong.

However, this kind of normality reveals an unusual meaning, which makes Wu Tongguang feel a little abnormal......

Li Wutong suddenly made a discovery and shouted: "Wu Tongguang, look! ”

Wu Tongguang leaned down and saw a small pinhole in the center of Professor Zhu's head.

"What is this?"

Wu Tongguang said: "I don't know, it seems that some needle pierced my head." ”

"This location is near the Baihui Cave, right?" Li Wutong asked.

"Well, yes."

Li Wutong said: "Such a central position, if it is to pierce the person's Baihui acupoint, it means that it is taller than the height of the person who was pierced, isn't it?" ”

"That's not exactly, if the person who is pierced squats down, or is lying on his stomach, it can be easily pierced."

Li Wutong said: "However, this hole is not deep, Baihui acupoint is the skull underneath, from the size of the hole analysis, if it is a sharp weapon, then it must be a very thin one, it should be broken when touched, it will not cause fatality, this small hole is not scratched by scratching our heads, we usually sometimes scratch our heads, maybe it is really just sudden death caused by a heart attack?" ”

Wu Tongguang said: "There is no way to determine what caused the death now, but we can be sure that there is definitely something wrong with this scene." ”

"How do you tell?"

"My gut told me that."

Li Wutong said: "The doors and windows are closed, there are no obvious fatal injuries, if he kills, how did the murderer do it?" ”

Wu Tongguang said: "We don't have much time, if the security guard and Secretary Wang can't bluff and go out to call the people from the police station, then Xiao Guodong and they will catch up quickly." What we need to do now is to find the cause of Professor Zhu's death as quickly as possible. ”

Li Wutong said: "Do you think the cause of Professor Zhu's death is related to the intelligence of 'Lei Yin'?" ”

Wu Tongguang said: "Yes." ”

"Tongguang, you have to find out the situation, we are still on a mission, if you make a mistake in judgment and are surrounded by people in the university, you will be in trouble."

"Xiao Guodong, if they want to catch up with us, if they rush here, it will take an hour at the earliest, and we are here for an hour, which is enough to figure out the cause of Professor Zhu's death, he must be related to 'Lei Yin'."

"Could this be, and only your intuition?" Li Wutong asked timidly.

You know, the longer they stay, the more danger they will be captured. Wu Tongguang wanted to pretend to be an important member of the Kuomintang within this hour to find out the cause of Professor Zhu's death, and if it was found out that he committed suicide or had a heart attack, it would be equivalent to wasting an hour of time to track down Lei Yin.

Of course, if it is found out that he killed him, whether the motive for the killing has anything to do with Lei Yin's intelligence, it is not necessarily, this kind of risk is really not a gamble.

Wu Tongguang said: "No, this is not intuition, Wutong, think about it, the simple score of "Guiyan" that we tried our best to push is the password, but Zhuo Shaoqing took the lead and recorded it one step ahead of us, you know, that poem was written in the notebook of 'Lei Yin' through invisible ink, and this notebook was snatched in two by me and Zheng Biwan, Zhuo Shaoqing could not know the content of the book, since he could predict the prophet, then there was only one possibility. ”

"What is possible?"

"That is Zhuo Shaoqing who first knew the song "Guiyan"."

Li Wutong asked curiously, "How could he know in advance?" ”

"The handwritten poetry collection found from the former residence of the master is exactly the same as the handwriting on the half-section book, which is copied by 'Lei Yin', which shows that 'Lei Yin' had been to Nanjing before and copied the poetry collection there."

Li Wutong said: "In this way, when Zhuo Shaoqing came to Nanjing through 'Lei Yin', he knew that "Guiyan" was a song. ”

"That's right! So the problem is obvious now, Zhuo Shaoqing and Professor Zhu are very good, since 'Lei Yin' and Zhuo Shaoqing have intersections, then it is very likely that 'Lei Yin' has also met Professor Zhu. Do you know what we're missing right now? ”

Li Wutong shook his head and did not answer.

Wu Tongguang said slowly: "That simple score has been recorded, the notes should be numbers, and if the numbers are to be translated into Chinese characters, we also need a specific master book!" ”

"Are you saying that this mother is very likely to be here with Professor Zhu?"

Wu Tongguang said: "If the deer has no antlers, and if the antelope has no horns, it will not be hunted by hunters." ”