Regarding the matter of "why Yuki is so excited", Xiang Shan certainly knows it.

The reason why this kid was so happy was because Xiang Shan promised to teach him some skills.

Xiang Shan admitted that it was a bit risky to expose his identity. He even considered the worst-case scenario - that is, the word "chivalry" has been completely distorted in this era, and the chivalrous man has long been without prestige. In this case, he even needs to stun Yuki and leave the town.

But he really lacks common sense about this strange time. He really needs someone from this era to help him. In addition, some involve brain modifications that he cannot do alone. If he wants to recover his martial arts, he needs a helper.

Yuki is the only person Xiang Shan can trust at the moment. Xiang Shan had been with him for a few months, and he knew that this child was kind and smart. He is also curious enough to learn about the world.

Judging from Xiang Shan's eyes, this child has the value of being trained to be an assistant or even an apprentice.

Regarding the matter of revealing his identity, Xiang Shan also went through a certain amount of consideration.

After weighing the risks and benefits, Xiang Shan finally chose to confess.

A few minutes ago, Xiang Shan saw the expression on Yuki's face with his own eyes, from stunned to frightened to relieved.

"I see that Xiang Shan, you are angry about what happened to the workers." Yuki said, "I believe you are a good man, a good knight. ”

Later, Xiang Shan asked Yuki where he could buy the parts and borrow a special set of tools. Yuki took Xiangshan to Dr. Schultz.

"Well, the parts you need, most of them are very common. I have most of them here. Dr. Schultz glanced at the list listed by Xiang Shan and nodded: "However, there are a few of them that are not cheap, so ...... case."

"Don't worry, I have the means to pay." Xiang Shan took out a spine from the package he was carrying. The spine had a silvery-gray sheen, heavy, not like a buildup of calcium and protein, and the density was close to metal.

This is the relic left by Will Granddog, a vertebrae.

Humans do develop such backbones. This is something that Xiang Shan just recalled. In the 21st century, human beings have made great progress in molecular biology and genetic engineering, and human beings can be genetically modified to allow the body to synthesize proteins containing metal elements.

If a person uses the modified virus to graft a new gene fragment into his body, and insists on taking anti-immune drugs for a period of time to suppress the rejection reaction between the original body and the new protein, then the cells composed of this protein will gradually replace the original cells, and eventually make people evolve from "Homo sapiens" to new organisms.

And this new species of Homo sapiens transformed from Homo sapiens has a stronger ability to adapt to cyber prosthetics. The metal-based proteins in his body will form natural wires and resistances, the threshold of "brain-computer interface" will be infinitely lowered, and the ability of cells to resist mechanical damage will rise sharply, and the hardware implanted in the human body will no longer cause necrosis of surrounding cells.

- This may also be the reason why Xiang Shan can wake up again after being in a coma for countless years.

From a certain point in time, the process of human prostheticization is like a wild horse that has escaped from the leash.

Xiang Shan doesn't remember anything more detailed. But he still remembers that in his time, the spine was still a very important thing. The metal-based spine is a natural data transmission line with a very large channel capacity and a natural fit with nerve signals, without the need for more adjustments. Many cyber modifications will preserve the brain, cerebellum, medulla oblongata, and spine.

And now, Will Grande Doug's martial arts prosthetic body still uses this technique.

Xiang Shan remembers that Yuki's mother, Yulia, sold her spine. It's still worth a lot of money today.

Dr. Schultz was taken aback: "You're going to sell this thing?" He looked at the stickman-like prosthetic body: "You don't plan to use it yourself?" ”

Xiang Shan pretended to be indifferent and said, "There is no medicine." ”

"Medicine?"

"That's the kind of ...... What do you need when you need a spine change...... That what? Xiang Shan asked tentatively.

After receiving metal-based gene fragments, the anti-apoptotic ability of cells increased, and all the receptors on the surface of the original cell membrane were rewritten, and the viruses native to the earth were almost unable to harm new humans. In addition, the increase in body temperature also makes humans immune to most of the old germs, fungi, and parasites. But that doesn't mean people don't have rejection. When you use someone else's spine, your body will have the same rejection reaction.

- Of course, this is the time that Xiang Shan remembers.

Xiang Shan didn't know how far the earth's technology had advanced after he fell unconscious. Yuki was not very clear about this kind of professional problem, so he could only come to test Dr. Schultz.

Dr. Schultz nodded, "Indeed...... The Reverse Messenger Infusion is really hard to get. ”

He didn't suspect too much. After all, the average person does not need to have their spine replaced in their lifetime.

"Yes, yes, Reverse Messenger Infuser!" Xiang Shan nodded, pretending to suddenly realize - fortunately, he has no face and no skin now, and even the sounder is a cheap commodity with no emotion, and he doesn't need acting skills.

- Reverse Messenger Infusion, a word I haven't heard before...... Messenger seeds, is it related to messenger RNA?

Xiang Shan is an engineer himself. But he vaguely remembered that he had a friend who was engaged in biology and had talked about related topics with him.

- The central rule, DNA enters genetic information into messenger RNA, and then the messenger RNA is then ripped into a long chain of polypeptides, which are folded by organelles and become proteins...... Reverse transcriptase? No, it shouldn't be......

- Can this process be reversed further?

It seems that the technology is still improving. Xiang Shan judged. In his time, except for special cases such as prions, other life activities basically followed the "central law", the expression process of biological genetic information. There is little you can do to reverse this activity within the cells of a higher living organism.

"But ......" Dr. Schultz flipped through the list and looked at it, "I really don't have these parts here...... This specification should not be applied to prosthetics, right? And the last one, an iron sheet no more than a millimeter thick and less than three centimeters wide? If you're looking for these things, you'd better go to the scrap parts recycling bins at the east end of town. ”

Xiang Shan explained, "This is to do some ...... Assistive tools. ”

"Judging by this list, you shouldn't be professionally trained, right?" Schultz shook his head: "Many of your specifications are not standard. I don't know what kind of prosthetic body you plan to make, but the professional prosthetic body of a martial artist is a rare thing after all. I don't want you to waste your hard-earned good parts. So, do you want to look at the blueprints on the Internet? ”

"Surfing the Internet?" Xiang Shan was taken aback. He remembers that the Internet disappeared because of the war. He really didn't expect that in this tattered world, there was such a thing as a network signal.

"Our town is relatively dilapidated and there is no public internet signal. But I have a private one at home. You sit in the middle of the living room and you should be able to receive it. I can give you a one-time access password......"

Speaking of this, he paused: "However, you'd better not download things casually, and don't open the preview of holographic signals......"

Xiang Shan did have some intentions.

But he eventually shook his head: "No, doctor, thank you for your kindness." The Internet must be expensive, and I can't take advantage of you for nothing. ”

"That spine has already made me a lot of money." Dr. Schultz patted Xiang Shan on the shoulder: "Also, you saved my town, and I really have to thank you." ”

"No, I'm not used to being favored for nothing. I'll lend you your net again if I need it. Xiang Shan still rejected Dr. Schultz's kindness.

Dr. Schultz did not invite again. He quickly found all the parts Xiang Shan needed, and lent Xiang Shan a professional biological tissue surgery tool.

After confirming that he was going far up the mountain, Schultz went upstairs.

The mayor was upstairs in a room.

"Uncle, he doesn't have internet access." Schultz looked strange: "Why do you want me to remember to invite him online?" ”

Dr. Schultz really didn't understand his uncle's request. Still, he did. Uncle was the most knowledgeable man in the town, and when he was younger, he traveled far and wide and knew some secrets.

"Dresden ......," the mayor called Scholz's name: "You should turn off the Internet first." ”

Schultz nodded, and gave instructions directly through the brain-computer interface to disconnect the home network.

Anyway, that's how he usually saves on network costs.

"You know what? Dresden. The mayor seems to be reminiscing about the past: "When I was young, I offended an official and had to leave the country. ”

Schultz nodded: "Indeed, but you are lucky, the official died later......"

"He was assassinated by a knight." The mayor was silent for a moment, then said, "That chivalrous man was called by me......"

"What?" Schultz screamed.

Collusion with chivalrous people is a great crime against Dyson's principles!

"I'm not in cahoots. It's just that I happened to meet a knight in the wilderness and asked for help. The mayor snorted, "Your grandfather, my father once told me that thugs like chivalrous are actually very easy to use. As long as you show humility to them, they won't embarrass you. Instead, they will assassinate officials they deem guilty for the sake of some evil sense of honor—something they can take advantage of. This is our very important survival wisdom. ”

Schultz exclaimed, "You've never told me ......"

"That was before...... The fewer people who know this secret, the better. The mayor was silent for a moment: "But now, the situation is different. The tax collector took in only eighteen infants, which is less than the standard ratio. We don't know what he's trying to do with us. We may have to rely on the power of the 'knights'. ”

Schultz immediately understood: "You mean...... Is the mountain a chivalrous man? ”

"I don't know what Mr. Shan did before he lost his memory, but I do know that all knights have a habit that they don't just connect to the Internet. I spent a few days with a knight, and they had to make long preparations before going online. The mayor whispered, "I don't know if Mr. Mountain is a chivalrous man. However, he did be able to fight—especially after obtaining the warrior's prosthesis. ”