"Wang Yinan, unemployed vagrant. Welcome to my lab", the man with glasses held out his hand.

"Zhang Qi, Rongyi Fund, it's abrupt, I'm sorry", Zhang Qi stretched out his hand and shook it with Wang Yinan. Dry, strong fingers, a horn. Zhang Qi once again raised his evaluation of Wang Yinan.

"In the past, it was a village-run enterprise, but then it was closed down and transferred, and it was idle, and the rent was cheap, so I rented it for five years at once," Wang Yinan said.

Inside the small building is a huge bay, and some discarded equipment is piled up in the corner. Like a typical IT company, there is no decoration, a few simple partitions, in the partition are several large desks, and there are a few computers on the desks, all of which are the kind of assembly goods with particularly large screens and ugly chassis.

In one corner of the room, there are two rows of huge bookshelves, and next to the bookshelves is a simple sitting area, sofa, and coffee table. This huge bookshelf is rarely seen in the company that Zhang Qi went to before. Zhang Qi walked to the bookshelf, most of which were photocopies in English, the kind that the school publishing house secretly printed, without royalties and without selling out. "Physical Review Letters", "Sciences", "Nature", Zhang Qi has a feeling of returning to the school library.

"I've read your information on the Internet, you are from the Department of Chemistry of University B", Wang Yinan's voice sounded behind him.

"Yes, looking at these books, I feel like I'm back in school," Zhang Qi replied.

"What to drink, tea or coffee, coffee is only instant, it is recommended that you drink tea, authentic Bitan drifting snow", Wang Yinan asked.

"Let's make tea, then." Zhang Qi sat down on the sofa, and on the coffee table there was a half-read magazine, "Chinese scientists have discovered angel particles, and they are expected to hit the Nobel Prize", which seemed to be a bluffing headline.

"The scientific community, that is, the Nobel Prize, and the 82-year-old legend of Yang Lao, can attract the public's attention, what do you think of this angel particle?", saw Zhang Qi flipping through the article. Wang Yinan asked.

"It's too outrageous, this guy who claims to have discovered angel ions is two Hawking away from Yang Lao, to say the least", Zhang Qi replied, "According to me, a master like Yang Lao, you can do whatever you want, and people don't break the law, so don't be blind to mortals like me."

Wang Yinan couldn't help but look at the capitalist in front of him, he was not a professional, and there were very few people like Zhang Qi who could make accurate judgments, and the public was often deceived by public opinion, thinking that this angel particle was so great and looked very tall.

Wang Yinan picked up the phone on the table.

"Red Star Factory, yes, I'm Wang Yinan"

"You guys send me a bottle of liquid nitrogen now, right away, as soon as possible, yes, in Jixiang Village"

Hanging up the phone, Wang Yinan said to Zhang Qi:

"Some materials are needed for the experiment, so I'll show you around my lab first."

"Isn't this your laboratory", Zhang Qi felt that his IQ was always insufficient recently.

"Considering the safety and heat dissipation issues, the laboratory is underground," Wang explains.

At the back of the bookshelf, there was an elevator, and Wang Yinan and Zhang Qi walked in and pressed the B1 button.

When the elevator door opened, Zhang Qi was immediately attracted by a huge machine.

This is a huge machine monster, the main body is four pitch-black cabinets, the cabinet is not a common 1U or 2U chassis, densely connected by cables, is a piece of bare plates, the board is full of various components, Zhang Qi can recognize some of the memory, some are CPU, and some of the components that cannot be named.

The most striking thing is the thick copper pipes on the side of the cabinet, on the side of each cabinet, there is a faucet-like thing, connected to a thick copper pipe, and then from this faucet many small pipes, connected to something like a radiator, covering each board.

All the copper pipes converge in a huge tank on the ground floor of the basement.

"The tank is water brought in from the water wheel, and after the heat from the machine is taken away, it is discharged directly into the river, so there is no pollution," Wang explained.

"It's the first time I've seen such an exaggerated radiator", Zhang Qi sighed.

"No way, my experiment needs to do a lot of calculations and simulations, so I had to assemble this supercomputer myself, in order to save costs, many CPUs or GPUs use relatively old models, and some are still eliminated defective products, so the heat generation is very huge, and the requirements for heat dissipation equipment are very high."

"Defective products, won't there be a problem", Zhang Qi asked.

"It doesn't matter, in large-scale parallel computing, an occasional mistake will be corrected by the system itself," Wang Yinan replied.

"This supercomputer uses 218 CPUs, all kinds of models, from the oldest Celeron, to the latest Supermicro Ryzen, and 86 GPUs, which are also available in various models, a 10 Gigabit fiber bus, connected."

"At present, there is no mature solution for this complex asymmetric interconnection", Zhang Qi is not a rookie, he has also seen many artificial intelligence companies, AI is known as a cow, and it has not played such a big game.

"Yes, so I didn't use an off-the-shelf solution, I started to rewrite from the kernel of the Linux system myself, and automatically realized the task dispatch and scheduling at the kernel level, I used a highly approximate solution, basically avoiding this NP complete problem, reducing the need for data transmission to a minimum"... 10,000 words are omitted below.

"Okay, I don't understand the world of Xueba", Zhang Qi raised his hand in surrender and asked

"What about the experiment you're going to show me?"

"Here", Wang Yinan took Zhang Qi to a separate area of the laboratory, next to it was a huge long table, rusty, as if it had never been cleaned, there was a laptop and a row of instruments on the table, most of which Zhang Qi couldn't name, except for a few that looked like they were showing waveforms or something.

"Do I understand this, can I read the experiment?" asked Zhang Qi

"You are from the Department of Chemistry of University B, you were born in science and engineering, people say that physical chemistry is a family, you must have studied ordinary physics, if you can't understand it, it's not my problem, it's your problem, you won't just pick up girls in college", Wang Yinan said.

"How can it, I'm a frequent visitor to the first-class scholarship, as long as you don't make anything too complicated, it shouldn't be a big problem", Zhang Qi was a little unconfident, at least the supercomputer in the middle of the laboratory was far beyond his understanding.

"Don't you want to be so good, you don't have to do experiments, take out the supercomputing of your four cabinets, plus the cooling device, and of course, the running system to take out the financing, I guarantee that all the AI teams will jump off the building, and all the angel funds will kneel down and lick your shoes, while singing "Conquest", while queuing up to wait for your favor... Zhang Qi thought silently,

"Including Me"

"By the way, you have to sign an agreement first", Wang Yinan took out a document from a filing cabinet on the side of the table, "This is a confidentiality agreement that I drafted with a lawyer friend."

XXX promised not to disclose everything he saw to any third party without Wang Yinan's permission. In case of violation, XXX will compensate for all direct or indirect losses. “。

"Do you need such an exaggeration", Zhang Qi asked suspiciously while signing.

"You'll find out in a moment"

On the experimental table, there is a small metal basin, Zhang Qi suspects that it is the basin sold in Carrefour, and a bracket of insulator is placed in the metal basin, and a very large coil is embedded on the bracket, about 20 cm long and 10 cm wide. The coil is densely wound with thin golden wires, round and round.

"Is it copper wire," Zhang Qi asked

"No", Wang Yinan connected the cables from both ends of the coil to the two power terminals.

Wang Yinan picked up a small piece of magnet from the table, "This is a NdFeB permanent magnet", he took out a steel hammer from his pocket and leaned over, the distance was not close to 2cm, the steel hammer was adsorbed to the magnet, and it was very difficult to take it down.

Wang Yinan put the magnet on the coil.

Then close the power switch.

outcome

Nothing happened.

"This is", Zhang Qi asked suspiciously, did I miss something, such as 100 million?

"It's nothing, check the power supply and lines", Wang Yinan replied casually.

Wait, liquid nitrogen! Wang Yinan called just now to ask for something, as if a lightning bolt struck Zhang Qi, he opened his mouth and asked Wang Yinan, "Do you want liquid nitrogen?" ”

"That's right"

"Liquid nitrogen is for cooling, right?"

"That's right"

Zhang Qi unconsciously stretched out his hand and pointed at Wang Yinan, "You can't make that thing, that coil."

"Yes, that's what you think, you now understand why you signed a non-disclosure agreement."

"Ding Dong, Ding Dong", at this time, the doorbell rang,

"Liquid nitrogen has arrived", Wang Yinan climbed the stairs, leaving Zhang Qi standing there with his mouth open.

Soon, Wang Yinan came down with a hot water bottle.

"Do you want to take a sip, the original flavor, it's similar to Sprite", Wang Yinan asked,

"Forget it" Zhang Qi subconsciously stayed away, don't be my little white, okay, this is a necessity for murder and arson, home travel, the disfiguring effect is much stronger than concentrated sulfuric acid, colorless and tasteless, and it can be volatilized directly after doing bad things, leaving no trace.

"The time has come to witness the miracle," said Wang, who double-checked all the cable connections.

"Please hold your breath", Wang Yinan poured half a bottle of liquid nitrogen on the golden coil at once.

Accompanied by a white mist of condensation of moisture in the air, the coil is quickly submerged by liquid nitrogen.

suddenly

The small piece of magnet leaves the coil and floats in the air. Then it loses its balance and hits the edge of the metal basin with a clang.

Sure enough, the superconductor in the liquid nitrogen temperature region was also made into a coil... Zhang Qi's heart let out a feeble moan. At this time, Zhang Qi regained his calm, and the most important characteristic of superconductors is electrical resistance.

"Is the resistance sure to be zero?"

"Will a completely diamagnetic object have resistance? Are you challenging physics?"

"How did you do it?"

"It's a long story, do you have the patience to listen?"

"Of course, as long as you let me invest, even I am yours, let alone my time"

。。。