The man in white's eyes were bright, and he seemed to be a little excited when he looked at the corpse, which was the state of excitement before the autopsy. It's like a painter holding a paintbrush and facing the mood in the canvas.

"Could it be that he was a surgeon?" Xia Chenghao thought to himself.

"The legitimate killers of ancient humans were called executioners, and they were highly skilled and knew more about the anatomy of the human body than any other human being."

Xia Chenghao had an ominous premonition in his heart.

The man in white asked softly, "In the Super Academy, you must have learned a lot of knowledge about human anatomy. ”

Xia Chenghao nodded, quickly calling up the biological information about these aspects from his brain, and the other children also nodded to indicate that they had learned.

"What's the point of that? That's because killing is a technique, but also an art. Why? ”

The children thought for a moment, and one of them replied, "The highest state of artistic beauty is freedom, and no matter how low and evil a skill may be, it is called art when it transcends the skill itself." Killing is also an art, we need to master the technique of killing people, and be artists who can kill people. ”

After saying that, I saw the man in white raise his head lightly without saying a word, and the room suddenly fell into dead silence, coupled with the smell of corpses, it was even more depressing to the point of suffocation.

Xia Chenghao stood there stunned, looking at the man in white, then at the corpse, and then at his hands, and had a premonition that he was about to cut open a certain corpse in this room.

"Not every skill in the human world has the opportunity to be practiced, and some skills are only practiced once. What cannot be proved can be ...... by analogy," the man in white's tone was still cold, and the cold light in his eyes had begun to dissipate.

"To be a qualified cleaner, you need to have superb technical connotation and psychological quality, first of all, to understand the object you want to kill, and then to skill. Knowing the official and acting the gods is the quality of your final pretending state, and you will definitely succeed. ”

Speaking of this, the man in white paused lightly and asked the children, "Do you know the 'Infernal Way'?" ”

Xia Chenghao thought for a moment, the answer was already clear in his chest, the two are only relative, although the bone and the flesh fit each other well, it is not the whole, the blade is not so thin that there is no thickness, with the thickness of the knife to the gap between the flesh and bones, but it can be done with ease.

"Remember, nothing in the world is inseparable, as long as you choose the right knife and learn how to use it, everything will be within your reach." The man in white took a deep breath, seemed to be a little sad, and after a long time, he spit out four short words, "Without exception." ”

Xia Chenghao understands that this is not just about killing people with a knife, but also about killing people by words or other means, in general, there is only one truth, which is the true meaning of "Infernal Affairs".

Hearing this, Xia Chenghao began to have many insights in his heart.

The man in white coughed lightly and reminded all the children not to get distracted during class.

"To become a supreme cleaner, you must understand that all kinds of actions of the human body are regulated by the nervous system, and are realized by muscle contraction and joint movement, and the nervous system is not a simple device that can be demonstrated, nor is it something that beginner killers need to understand. Let's start with muscles. ”

The sharp blade quickly sliced through the corpse's skin, and after a few minutes, half of its body was exposed to no skin. Because it has been left for too long, there is not much blood flowing out, and the peeled skin is picked up by the tip of the knife.

The man in white didn't raise his head, and with a flick of his hand, the human skin flew to Xia Chenghao's face.

The children's stomachs began to churn, and they stared at the white forest with nausea.

The man in white then continued: "A normal person has two hundred and six bones, but there are six hundred and thirty-nine skeletal muscles, which are made up of muscle fibers separated by tough connective tissue. ”

He gently cut off a large piece of human flesh with a knife and handed it to Xia Chenghao, who was the closest, the child gritted his teeth and reached out to take it, the piece suddenly seemed to twitch, moved slightly, and seemed to retain the pain, wanting to scream.

All the children had numb scalps, weak soles, cold palms and sweaty palms.

"Each muscle fiber is less than 100 microns in diameter, and the muscles are stretched and contracted by this protein filament. A single muscle fiber produces very little force, but if the muscles of the whole body are combined and moved at the same time, a weight of 25 tons can be lifted. The man in white glanced at Xia Chenghao and added, "Of course, this is just the theory you saw in the Super Academy, no one can exert their strength at the same time, do you know why?" ”

Xia Chenghao's mouth was a little dry and bitter, and he swallowed his saliva to keep his voice from shaking too much, "The forces are not in the same direction, and they cancel each other." ”

That's right, that says two things. First, a large number of people is not necessarily a good thing, and the greatest ability of a rabble is to contain each other; Second, if you can control your muscles to maximize the force in the same direction, it will make the opponent fatal. The glass mask of the man in white still flashed so coldly, with a blinding white light.

Xia Chenghao nodded vigorously, because this was exactly the answer he thought of, and every child here also thought of these two points, at least one of them, and nodded frequently.

The man in white casually snatched the piece of meat from Xia Chenghao's hand, and together with the scalpel, stared heavily at the center of the corpse.

"It is ATP that provides energy to the muscles, the mediator of energy, which consumes energy and can produce lactic acid. People who have too much lactic acid accumulation will feel soreness in their limbs, and the soreness will disappear when the lactate oxidizes or resynthesizes muscle glycogen. This also illustrates two problems: first, maintain a moderate amount of exercise; Second, replenish energy in any situation. ”

Xia Chenghao kept nodding, his eyes firmly fixed on the muscle that was rapidly darkening due to oxidation.

Each step taken by the man in white leads to a corresponding conclusion, and the children learn more about the human body and the world.

"The most powerful muscles in the human body are in the big feet, look here......" The man in white pulled out the scalpel and slashed his thighs with a loud sound, "The muscles are layered, this is the first layer of muscle of the quadriceps." Come, cut this muscle off. ”

Xia Chenghao had no way out, and with rapid breathing, he cautiously began to cut meat on the corpse's thigh.

Clumsily pressed against the freshly cut incision, I could feel the delicate smoothness of the thigh muscles, but at the same time I felt extremely nauseous. He didn't dare to show fear and disgust, and the man in white next to him would throw him into the pond at any time to feed the mermaids on the grounds that his psychological quality was not up to par.

The man in white explained the regional structure that everyone saw, red muscle fibers contain myoglobin, and myofibrils are less so they contract slowly and cause less explosiveness, but it has its advantages, that is, it has strong endurance; White muscle fibers contain more myofibrils, which contract quickly and forcefully, and have strong explosive power, but have poor durability.

After the introduction, he did not forget to remind all the children present: "In the future, you will fully feel the different functions of these two muscles in the real physical training course." ”