The all-black semi-circular sphere rests on a double-rod support device, which is surrounded by a cortex, which can be well protected by the person sitting in it, especially when it is running.

This is another device that Zhang He came into contact with after completing the Jiwu fit test, called the Virtual Optic Nerve Device, which was specially developed to match the Jiwu talent of the devourer.

Before Zhang He's arrival, this device had already been used by his teammates, and every three days, each candidate had thirty minutes of opportunity to practice specially.

For virtual optic nerve devices, it is not that the longer they are used, the better the effect, because from the perspective of human neuroscience, human nerves also have a limit to endure, and beyond this limit, then human nerves will cause permanent damage.

Of course, the limits of nerve tolerance vary from person to person, but since the development of human medicine, thirty minutes is definitely safe for people who have been injected with at least 2 strong base elements.

"Is this also a product that your father controlled and manufactured?" Zhang He stroked the virtual optic nerve device and asked Zheng Zhong.

On the other hand, Zheng Zhong pursed his lips, nodded with a foul face, and then shrugged his shoulders again, as if to show Zhang He that there was a father who controlled the assets of the Underworld Castle, which made him very helpless.

But this look seems to others to be a naked display.

Zhang He, who already knew a little about Zheng Zhong's personality, sighed lightly: "Can you introduce it quickly?" If you deliberately show your arrogance as a rich second generation if you have nothing to do, I swear that I will never say a word to you again! ”

Hearing Zhang He's words, Zheng Zhong shook his shoulders and chuckled: "In these days, being a rich second generation not only attracts envy, but also asks people to make friends, am I easy?" This rich second generation is not my own volition! ”

However, before Zheng Zhong's words fell, he saw Zhang He's already clenched fists, raised his hand helplessly, signaled that he would admit defeat, pretended to cough lightly and shook his throat and said: "The operation level will wait for you to follow the instructions after you enter, I don't need to go into detail, but I can simply tell you the basic principle of it!" ”

"I told you before that martial arts require accumulated training, and the purpose of this training is to allow the cultivator's nerves and brains to achieve some kind of synergy at the same frequency, that is, to achieve free sending and receiving at the level of strength, in fact, the same is true of qi and veins, the so-called meridians are, to a certain extent, they are the nerves in medicine, but the names of the two are not the same in martial arts!"

"If you interpret it this way, then I can roughly understand why it's called a neural device!" After Zhang He heard Zheng Zhong's words, he nodded slightly.

Seemingly very satisfied with Zhang He's ability to understand, Zheng Zhong instead raised his hand at Zhang He and motioned for him to continue.

"Since you said that martial arts require nerves and brains to achieve some kind of synergy at the same frequency, then the nerve device must be used to resonate with muscles and nerves, based on this point of reverse inference, presumably the previous virtual vision should use some technology that can stimulate the brain, so that with the cooperation of the two, the cultivation time of extreme martial arts can be shortened and the effect of twice the result with half the effort, right?"

Hearing Zhang He's understanding, Zheng Zhong applauded lightly and said: "It is worthy of a special enrollment, and you can't be judged by ordinary people's standards!" As you said, this is indeed a device that enhances efficiency in order to do more with less! ”

It's just that Zhang He suddenly asked suspiciously: "Muscles and nerves can resonate with the brain, so how to explain the volume of qi and veins?" ”

As if he knew that Zhang He would ask such a question, Zheng Zhong took Zhang He's hand and went around to the side of the virtual optic nerve device, where a nitrox storage bottle was placed.

Zheng Zhong then pointed to the thing in front of him and explained, "The definition of qi is very mysterious in ancient martial arts, and many records and understandings mostly believe that this is an unknown form of energy, but in fact, from the scientific interpretation level, it is what we often call oxygen!" ”

"Oxygen?"

"Yes, oxygen! Doesn't it feel like? In fact, I don't know the specific reason, I've just seen the basic principle of this device, who let my father's study have a particularly comfortable waterbed, and he never comes back, then I will use it more, but you know, sometimes the friends who meet are very curious, and I naturally have to help explain it......"

"Stop! Do we say oxygen is okay? Zhang He stretched out his hand and pointed at Zheng Zhong, interrupting him.

Because Zhang He found that the originally normal knowledge popularization seemed to be led astray by Zheng Zhong's kid unconsciously, and it was obvious that the little partner in his mouth was the kind of opposite sex who didn't know how to hook up with him.

If you follow Zheng Zhong's words, it will definitely be something very indecent.

Zheng Zhong shrugged his shoulders indifferently and said with a smile: "Okay, let's talk about oxygen!" But if you have a chance, you must come back to the upper area with me, and I'll show you the waterbed when the time comes! After all, seeing is believing! If you can call a few more...... You know! ”

"Say! Oxygen! Gas! Zhang He said ruthlessly.

Zheng Zhong seemed to have seen through Zhang He's mask his face that was about to be angry, and subconsciously smiled: "Okay, say oxygen!" ”

After shaking his throat again and adjusting his state, Zheng Zhong smiled at Zhang He and said, "Ed...... That's right, oxygen! From a biological point of view, oxygen is an essential element for human respiration, and I won't talk about how it circulates in the human body, but we will mainly talk about the role of martial arts! ”

"We can clearly perceive the qi when we breathe, but in fact, our skin, hair, and even muscles and nerves will breathe and need oxygen, but this oxygen is very small, and it is more in the form of atoms, and when you enter the virtual optic nerve device, you will be in a high-oxygen environment to activate the hidden activity of your body!"

Hearing Zheng Zhong's words, Zhang He nodded and said: "When you talk about activity, I roughly understand what you mean, if the skin, hair, and even muscles and nerves can always be soaked in a high-oxygen environment, then the activity will be ignited over time, and all the external perceptions of the human body will become more acute, and after getting out of this environment, you will naturally have a better sense of touch to the surrounding environment!" ”

"Yes, and the qi vein is in the position of the nerve node, that is, the acupuncture point is often said to store this kind of high oxygen, of course, this is only a relatively basic theory, there should be a way to call this qi in the ancient martial arts, but unfortunately, there are no real examples so far, they only stay in the excavated relics and documents, very fragmented or even one-sided!"

Zhang He silently summed up what Zheng Zhong said in his heart, and roughly had a basic understanding of Jiwu and the virtual optic nerve device.

Subsequently, the first extreme martial arts cultivation finally came to Zhang He's turn.

According to the instructions of the system, Zhang He took off his coat in a separate compartment and entered the virtual optic nerve device, and the other side of the original semicircle suddenly closed to form a complete circle, which also sealed Zhang He in it.

Immediately afterwards, Zhang He felt the pressure around his body skyrocket, and under the super squeezing, the muscles of his body had a feeling of suffocation, if he could not breathe, Zhang He even felt that he was about to suffocate.

Suddenly, a large amount of visible aerosol erupted from the ball, and after inhaling it, Zhang He even felt that his lungs were about to burst, and his heart also accelerated the frequency of jumping, constantly decomposing the high oxygen in his lungs.

Just when Zhang He felt that he was about to be blown up by a mouthful of high oxygen, the pressure that was originally squeezed on his body quickly disappeared, and in an instant, Zhang He's original feeling of depression was relieved to a certain extent.

After experiencing the extreme experience from tight to loose at the beginning, the body that was squeezed at first felt extremely relaxed and relaxed.

Slowly closing his eyes, Zhang He began to adjust his heart rate as much as possible, and he even began to try to inhale high oxygen again in small sips.

However, this time the body no longer seems to resist, although the intake is not large, Zhang He can clearly feel that the body seems to be integrated into the aerobic mist, and the skin has become extremely sensitive.

Subsequently, Zhang He felt a very gentle vibration on the surface of his body, which put the whole body in a synchronized and coordinated rhythm.

But with the extension of time, Zhang He felt that the surface of his body began to discharge fine sweat, and there were even a lot of viscous substances in it, but the discharge of this substance also made the body more comfortable.

Just as Zhang He was immersed in this feeling, he suddenly felt a tingling pain in the back of his neck, and then an indescribable feeling even made Zhang He frown unnaturally.

In the next second, Zhang He, who had closed his eyes, suddenly sank his head and fell into a coma......

It's just that Zhang He's coma this time is just an appearance from the outside world, in fact, Zhang He's spirit is still extremely active, and Zhang He, who closed his eyes, also came to a space where he couldn't see the boundary clearly.

Gently raising his hand and clenching his fist, Zhang He found that the perception of his body was significantly strengthened, and even when he touched his skin, he would feel a sense of rebound.

Just when Zhang He was wondering about the environment he was in, a human who looked exactly like Zhang He appeared in this mysterious space, and he slowly walked to a distance of about 2 meters in front of Zhang He and stopped.

He then began to move on his own, and his movements were extremely slow, especially at key action points, and he would stay for a few seconds.

Subconsciously, Zhang He began to learn from the person who looked the same as himself......

It's just that what Zhang He didn't know was that at this moment, inside the virtual optic nerve device, Zhang He's whole body was wrapped in a high-oxygen mist.

Along with Zhang He's movements in the virtual space, his limb muscles also began to flicker with different degrees of light in the mist, obviously cooperating with Zhang He's movements, thus vibrating nerves and muscles, making them achieve synergistic resonance.