San Francisco is a land of freedom. Mrs. Lee converted a sum of money into bitcoin and used it to rent Uber's self-driving car, which was a match made in heaven, with little chance of being tracked.

There is a maker group called SF-MADE, which likes to tinker with its own gizmos, and its members like to make their own gadgets that simply don't exist on the market.

After saying goodbye to Emily's sister, Li Xiantai rushed to SF-Made's base camp at the first stop, an ordinary-looking apartment. Before setting foot in this place, when he was in the underground parking lot of the apartment, Li Xiantai felt the strong maker smell here.

The equipment of their parking lot is actually a self-made automatic toll collection system, and it is necessary to scan the QR code on the smartphone to pay to put away the iron plate on the parking space.

Li Xiantai stared at this charging equipment for a long time, and had a feeling of finding the organization.

Today's SF-MADE home camp is particularly lively, as someone has come up with a star product - an AR-15 semi-automatic rifle. All firearms sold in the U.S. must have a gun number, unless ...... The gun was made by itself.

The AR-15 is a lightweight rifle that makes extensive use of composite materials and uses aerospace aluminum alloy for key components. This star product uses a 3D printer to make the gun body, and a desktop C (numerical control machine) is used to make the parts that require high strength, which is very similar to Colt's AR-15.

Makers from all over San Francisco stroked the gun with love and listened to its owner explain how it took months for a novice with little knowledge of firearms to build a real weapon that could kill people with precision.

The voices of compliments are endless: "In this way, it will be difficult for those ** countries that strictly prohibit guns, and the people can secretly organize ** armed all the time!" ”

Owner: "I'm afraid that the FBI will send a water meter to my house, so I haven't made it public." ”

There was laughter all around.

Suddenly, a voice said coldly: "It's not difficult to make firearms, it's not easy to make qualified bullets, there is no bullet ** army or no play, it's better to try to see if you can make a lot of bullets, hehe." "Of course it is, otherwise Li Xiantai would not have sold weapons to the Soviets.

Everyone turned their heads and saw that it was a big boy who was not commensurate with his mature views.

The owner of the AR-15 said to Li Xiantai in a teasing tone like a child: "It's better to leave this task to you!" ”

There was another burst of laughter all around, and everyone thought that this kid couldn't have any amazing production ability.

Li Xiantai thought that after Solomon's group of Chinatown guys had mines, they were more than able to defend and lacked aggressive ability, so it would be good if they got some offensive weapons.

So, Li Xiantai said half-truthfully: "I heard that the US Defense Advanced Research Projects Agency has invented a bullet that can turn, this is a good thing, the irregular army lacks training, isn't it more powerful to use this good thing than to make ordinary bullets?" ”

Someone commented: "Isn't this a bit ambitious? ”

On the contrary, Greenberg, who successfully copied the AR-15, agreed with Lee's idea and said that it was "worth considering".

As soon as his words fell, before he could say anything, Li Xiantai contributed an idea: "You can make bullets on the basis of the AR-15, because the AR-15 uses a piece of aluminum for processing at $80, and it just so happens that the scraps of this piece of aluminum are ground into ultra-fine aluminum powder, which is the fuel for solid-state rockets."

Since it can turn a corner, it must be similar to a mini rocket, and we can make perfect use of the residual value of aluminum powder. ”

A buddy who gradually entered the state said, "So, how do we control the direction of the bullet?" ”

Li Xiantai said with a smile: "Let's go check the technical secrets of the spaceX rocket!" ”

Yo, at such a young age, even know the technical secrets of SpaceX? It's not easy. Everyone was impressed by the richness of the teenager's knowledge.

There is even more powerful in the future, Li Xiantai casually calculated on the whiteboard how much aluminum powder fuel should be filled and what kind of oxidizer should be needed to achieve the range of 2,400 meters of the most powerful sniper rifle at present, plus how much additional fuel needs to be added to adjust the air posture.

How to cram an open source Arduino circuit board into a small bullet space, it is almost a drastic change to the Arduino, and this alone is so powerful that all the makers present are suppressed.

Greenberg excitedly asked to join Li Xiantai's organization, originally he still wanted to work alone, but when he saw such a talented teenager, he couldn't help but love talent, and wanted to get to know this heroic boy by completing a project together.

Although the other makers were not directly involved, they all showed a strong onlooker posture. They don't care how terrifying the things they make, because they're geeks, and the more powerful they are, the happier they are.

And what surprised everyone even more was the good things he brought to everyone.

Don't underestimate these makers, they have deployed a lot of automatic pick-and-place machines in this apartment, and if you program the pick-and-place machines, you can turn the small apartment into a small factory with tens of thousands of electronic products per month.

The surprise that Li Xiantai brought to them was that they could use an application in Phantom Mirror to record the actions of the automatic pick-and-place machine.

As soon as the doxing is installed once, the app will automatically learn everything and even optimize the process of recording. Friends no longer have to worry about the time-consuming and laborious programming of automatic pick-and-place machines and automatic robotic arms.

When Li Xiantai demonstrated this application of the magic mirror to everyone, there was a cheer in the apartment workshop, as if to welcome the great leader. And Li Xiantai has naturally become a rising star of SF-MADE.

Naturally, Greenberg wanted to invite the little star to a meal on behalf of SF-Made's partners to enhance the relationship by the way.

Knowing that Black had come all the way from the Far East, Greenberg, a snake in the land, suggested that he go to a Mexican restaurant, and as a tech maniac, Greenberg believed that the best cuisine in a place must start with local ingredients, and the whole of California was formerly Mexican territory.

So Greenberg wants to take Li Xiantai to an authentic Mexican restaurant so that he can experience the food paradise born of the ancient Aztec civilization.

Li Xiantai fell in love with the crispy Mexican beef strudel with a beautiful color, green lettuce, bright red tomato pieces, refreshing bean paste, soft shredded cheese, half-rolled up full of exotic style, and the stone pot that seemed to have gone through thousands of years of wind and frost with lime and avocado salad, looking full of special Aztec.

The meal was a great one.

Greenberg's love for talent was overflowing, saying, "Do you want to stay in the United States?" I can hire you as a full-time employee of SF-MADE, and you can get a green card. ”

Hehe, it's very good to find the organization so quickly, Li Xiantai immediately agreed, and in the future, he can use SF-Made's apartment as a secret base, and he is not in a hurry to cooperate with Google X Labs.

Now, the White House has guessed his relationship with Phantom Mirror, and if he sends secret agents to track down the people who worked with Google X Lab contacted through Phantom Capital, it will be very inconvenient for Li Xiantai to keep his identity hidden.

Fiorina is really a person who will trust the rivers and lakes, and soon found a person from a United Nations human rights organization to harass the White House, and then the White House was "overwhelmed", announcing that the photo of the minor Kantaro would be taken down, the global wanted warrant was canceled, and the task of pursuing Kantaro was handed over to the secret service, but in fact, the secret service had no one to dock this task, so the wanted warrant was revoked in disguise.

The question is, how can we erase the photos of Li Xiantai that already exist on the Internet? Mrs. Li first asked Saber to collect data about his photos, and it turned out that there were thousands of servers with his photos, most of which were the same one, the one published by the U.S. government.

It's only a few thousand servers, and that's okay, it's tantamount to a mayfly shaking tree for the average hacker, but it's not too difficult for Saber, who already has a lot of NSA backdoors. Mrs. Lee asks Saber to carry out the plan of "stealing the sky and changing the day".

The essence of this plan is to use 10 photos that have a certain resemblance to Li Xiantai's photo, and gradually replace the real photos. All 10 of these 10 photographs were composited by Saber, and the similarity gradually declined, and when the last batch of photos was replaced, humans basically did not know the true appearance of the original Kentaro.

Li Xiantai also sent lawyer's letters to major websites in the name of human rights organizations, asking them to remove their photos through legal procedures, and if they did not obey, don't blame Li Xiantai for hacking their photo servers.

Li Xiantai's plan made Saber feel amazed, it turned out that she thought that it was impossible to delete the pictures on the Internet, it seems that she was wrong, nothing in this world is impossible.

Greenberg, the co-founder of SF-MADE, will never regret hiring the amazing teenager "Black", who is so competent in the daily work of SF-MADE, that SF-MADE's progress is very obvious, and he is ambitious to participate in the robot competition organized by Amazon.

Amazon is quite enthusiastic about using robots to sort packages, however, when it comes to a large number of irregular small goods, the current robotic arm cannot effectively sort, so their logistics mechanization department organized this sorting robot competition.

On the bright side, Mrs. Li used the holographic recognition function of the magic mirror to calculate the size of the object and the initial angle and strength of the object in real time, and then adjusted the robotic arm according to the force feedback of the object. Because of the use of the program of the phantom mirror, Li Xiantai can show his strength in a more low-key manner.

He had to keep a low profile, otherwise he would be scared of his friends if he handed over the programming to Saber and would be able to do the job perfectly overnight.

Now Saber can complete the work in one night, he divided it into several parts, handed it to the four friends, it takes about half a month to complete, and this is when the four friends are all elite programmers.