Lin Jie rushed to the Binhai University Medical School's experimental building at the fastest speed, and saw that Tian Xiangyu, Lu Xiaoyu, and others were all present, each with a heavy expression.

A total of six experimental monkeys, and one suddenly died, this is no small matter.

Zhao Fang, who called him, already had red and swollen eyes from crying.

Lin Jie glanced at Zhao Fang first and solemnly asked, "What exactly happened? Besides monkey number six, were there any abnormalities found in the other experimental monkeys?"

These six experimental monkeys were placed in a large room on the top floor of the experimental building after completing arteriovenous replacement surgery in different areas of the brain.

Each monkey lives in a large wire cage, nearly two meters in length, width, and height.

Normally, Guo Peng, Gao Yanhong, Xiao Ganghao, and others spend three to five hours a day taking care of them, checking their physiological values, and carefully observing and recording their diet, activities, and emotions.

At night, Guo Peng, Gao Yanhong, and others take turns on duty.

In situations where they cannot be absent such as classes, they hire familiar juniors to take care of the experimental monkeys on their behalf.

Basically, there is always someone in this large room.

At the same time, there are two surveillance cameras operating 24/7 in this room.

Hearing Lin Jie's question, Tian Xiangyu stepped forward to report: "Teacher, I, along with several juniors, conducted a preliminary check on the other five experimental monkeys and haven't found any abnormal symptoms yet."

"However, to be safe, we've transferred them to another lab and conducted disinfection and quarantine. The deceased monkey number six is still in the original lab."

"Lin Jie, should we perform an autopsy now to determine its exact cause of death?"

Lin Jie nodded, affirming Tian Xiangyu's handling measures, then said, "Let's hold off on the autopsy for a moment. Zhao Fang, please recount the specific course of events."

Zhao Fang wiped her tears, stepped forward, and said, "Teacher, I was on the night shift last night taking care of these experimental monkeys. They behaved quite normally the whole night..."

"In the morning... around 7:10 in the morning... sob..."

Zhao Fang couldn't help but start crying again.

Lin Jie frowned slightly and said, "Now is not the time to cry, we need to find out the cause as soon as possible, try to control your emotions."

Zhao Fang nodded vigorously, stopped her tears, and said, "Around 7:10, I went to the bathroom on the west side of the corridor and took about five or six minutes."

"When I got back, I found..."

"I found monkey number six lying limp in the cage, not moving, I thought it was just sleeping..."

Zhao Fang wiped the overflowing tears with the back of her hand, sobbing, "A dozen minutes later, I realized something was wrong with monkey number six, and upon getting closer, I discovered it was dead..."

"Teacher, it's my fault, I didn't do my job well, sob..."

"Teacher, please don't kick me out, don't kick me out..."

"Zhao Fang, don't cry for now, this may not be your fault."

Lin Jie simply comforted her and asked, "Who checked the surveillance footage? Was there anything unusual?"

"Teacher, I downloaded the surveillance video. Here... take a look..."

Huo Guangheng handed over the tablet, speaking softly, "The anomaly occurred at 7:13:21."

Lin Jie carefully watched the silent video.

In the video, the six monkeys were either clinging to one side of the cage, hanging upside down from the top, or lazily swaying inside, everything seemed normal...

The video progressed to 7:13:21.

At that moment, all the monkeys seemed to experience a massive shock simultaneously.

Including monkey number six, four monkeys frantically moved up and down inside the cage, while the other two huddled in a corner, shivering with their heads in their arms.

At 7:13:46, the frenzied monkey number six suddenly froze and then collapsed headfirst in the cage.

After more than ten seconds, the abnormal behavior of the other five monkeys gradually subsided and they slowly returned to normal.

During this process, Lin Jie did not see anyone or any other creatures breaking in on the video.

Lin Jie reviewed the video several times, and besides noticing the monkeys' unusual reactions, he still didn't find any other abnormal points, and asked, "I suppose you've all seen this video, what's your take?"

Xiao Ganghao contemplated for a moment and said, "Teacher, I believe the experimental monkeys were subjected to sudden stimulation or fright."

"We didn't find any signs of a break-in at the lab, unfortunately, the surveillance video doesn't have sound. Teacher, we have a hypothesis that they might have been stimulated by a sound."

"If someone used sound to stimulate the experimental monkeys, they wouldn't even need to step into the room."

Lin Jie felt this hypothesis was quite plausible and after thinking for a bit, instructed, "Tian Xiangyu, Zhao Fang, you two will assist me with the autopsy of monkey number six so we can determine its exact cause of death."

"Song Licheng, Lu Xiaoyu, Huo Guangheng, Guo Peng, you four start investigating the matter. There are quite a few places in this experimental building equipped with surveillance. Go check to see if you can find anything."

"Fang Huanru, lead the others in conducting a thorough examination of the other five experiment monkeys."

Under Lin Jie's arrangements, everyone got busy separately.

Lin Jie, Tian Xiangyu, and Zhao Fang moved the deceased monkey number six to the adjacent surgical laboratory.

After putting on surgical sterilization attire and setting up the camera, Lin Jie spoke into the camera, "Experiment monkey number six died suddenly due to unknown reasons on the morning of July 6th at 7:13 AM, twenty-one days post-surgery."

"Autopsy time, July 6th at 9:31 AM."

After saying that, Lin Jie looked at Tian Xiangyu and Zhao Fang, asking, "What do you suspect is the cause of death?"

"Stroke or heart disease."

Unexpectedly, Tian Xiangyu and Zhao Fang shared the same opinion.

Lin Jie remained noncommittal, saying, "Let's begin the autopsy now. Zhao Fang, you'll be the chief surgeon!"

Zhao Fang was puzzled for a moment, then gratefully glanced at Lin Jie before silently moving to the chief surgeon's position on the dissection table. She took the scalpel handed over by Tian Xiangyu and made an incision through monkey number six's chest skin...

After slicing open monkey number six's chest, quite a bit of blood oozed out.

Cleaning the blood from the thoracic cavity, Zhao Fang couldn't help but say, "Heart rupture? How could this happen?"

Tian Xiangyu leaned closer, pointed at the spot of the heart rupture, and said, "Zhao Fang, did you see it? This small patch of myocardium has turned pale and necrotic. Did you figure out the reason?"

Zhao Fang observed the area closely for a while, nodded knowingly, and looked up at Lin Jie, softly saying, "Monkey number six had a mild myocardial infarction, causing a small region of myocardial ischemia and necrosis."

"However, under normal circumstances, this small necrotic section of myocardium wouldn't significantly affect the heart's regular beating."

"But... monkey number six was suddenly stimulated, and the heart started to beat rapidly and forcefully."

"This abrupt increase in force, several times greater than usual, caused a rupture at the junction of the necrotic myocardium and normal myocardium, leading to massive bleeding and swift death of monkey number six."

Lin Jie nodded appreciatively, "Your explanation is correct. It seems we have pinpointed the exact cause of death."

He sighed and said, "This was our oversight. We didn't perform a more in-depth examination of the experiment monkeys. Otherwise, this monkey's myocardial infarction symptoms should have been detected."

Tian Xiangyu comforted, "Teacher, it's understandable."

"The heart attack symptoms of this experiment monkey were relatively mild. Its heart fluctuation data has significant differences from humans. Without using large inspection equipment and without a veterinarian expert, it's challenging for us to discover."

Lin Jie also realized that what Tian Xiangyu said was indeed the truth, he advised, "Even after twenty-one days post-surgery, we can discern quite a few things."

"Tian Xiangyu, perform fixative processing on this experiment monkey's brain, then dissect it to check for any pathological or physiological changes."

Both human and animal brains are extremely fragile and quickly deform once removed from the support of the skull.

The brains seen in laboratories or film are all specially treated and immersed in specific solutions.

Lin Jie instructed further, "Zhao Fang, continue the dissection. Check for any other pathological changes..."

Under Lin Jie's supervision, Tian Xiangyu first carefully removed monkey number six's brain, placed it in a specially formulated solution for immersion and solidification, then assisted Zhao Fang with the dissection...

By the time the three left the experimental surgery room, it was already past noon.

Lin Jie discovered Fang Huanru, Song Licheng, Huo Guangheng, and the others waiting for him outside, his eyebrows raised as he asked, "Have you identified the cause?"

Song Licheng replied with a complex expression, "We checked several surveillance videos and targeted a person."

"Her name is Xiao Xiuhong, a graduate student in her second year, enjoys climbing stairs for exercise. She often comes here to climb the stairs in the calm of the morning at the laboratory building..."

"At the very moment she reached the top floor, someone called her..."

Speaking to this point, Song Licheng angrily said, "Xiao Xiuhong set her phone ringtone to a tiger's roar..."

"Damn..."

The cause of monkey number six's sudden death turned out to be so unexpected!

At this moment, Lin Jie didn't know how to express his feelings; it seemed only a loud curse could vent this indescribable emotion.

After letting out a curse, Lin Jie's mood eased somewhat, and he consoled himself and everyone, saying, "From a positive perspective, it's good news that no one intentionally sabotaged us..."

On Saturday, Lin Jie spent eleven hours performing a nerve damage repair surgery on Shu Jiaxiang's right calf.

On Sunday morning at 8:30, Lin Jie traveled to Huiming Eye Hospital, accompanied by An Kexin.

"Ah Jie, for the past two days, Ye Peihua hasn't contacted us."

An Kexin softly said, "Both my father and I believe that Ye Peihua may use this meeting opportunity to firstly express gratitude for your treatment of the housekeeper, and secondly to propose a collaboration suggestion in person."

"As your fiancée and the owner of Anlin Hospital, I have the qualification to represent you in this matter."

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