"Who's that man?" Gongsun Shuren was already in a state of dialogue with the sage, and when he heard Song Ziyu's words, he couldn't help but ask.

"That man is the guest of Venus---- Nikolai. Tesla. Song Ziyu said this magical name.

"What did he do?" Gongsun Congyun asked.

"In a way, he established the norms of modern physics."

Song Ziyu talked eloquently, slowly telling the past story of Tesla and Edison about the "AC and DC war".

In the end, Tesla pulled Edison off the altar and ended the history of direct current as the main body of electricity.

So, the problem is back to the basics.

"What is alternating current?"

Gongsun Shuren said: "Judging from the story you told me, alternating current is the mainstream of electricity use, but what needs to be done? How to make changes in technology? ”

Song Ziyu gritted his teeth and said, "Mr. Gongsun, let's make a deal, shall we?" If I put the complete technology of alternating current in your hands, will I be able to buy you protection for me? ”

"What the hell is going on?" Gongsun Shuren looked at his son.

Gongsun Congyun didn't dare to hide it, and quickly told his father about it.

"Kill Kong Youfang? I can't see that you kid can still cause such a big trouble! Gongsun Shuren showed a contemplative expression.

After a long time, Gongsun Shuren said: "This deal can be done!" As long as you come up with the alternating current technology, our Gongsun family promises to provide you with shelter. ”

"It's a deal!" Song Ziyu was overjoyed, and immediately said: "At most, in two days, I will give you what you want, and I hope that you will not break your promise when the time comes." ”

"Broken promise? How could it be! Am I like a broken word? Gongsun Shuren said.

"That's good!" Song Ziyu said.

……

After having dinner at Gongsun's house, Song Ziyu returned to his residence non-stop, and after settling down, Song Ziyu traveled back to the civilized world.

Without lingering, Song Ziyu went straight to the Xinhua Library, and then frantically purchased electric power books in front of them.

"The Principle of Alternating Current", "The Primary Application of Alternating Current", "Maintenance and Manufacturing of Alternating Current Motor", "Precautions for the Erection of AC Power Grid"......

A series of books related to alternating current, Song Ziyu purchased them all!

This behavior attracted the attention of an old man who was consulting the information beside him.

"What are you doing here, young man?" The old man asked.

The old man with heavy lenses was quite old.

Song Ziyu said: "I plan to build an AC power plant. ”

The old man smiled: "Young man, you are a layman, right?" With these basic books, you can't build a proper power plant. ”

"Oh?" Song Ziyu asked curiously, "Then what else do I need?" ”

The old man said: "The easiest way is to have a complete set of drawings for the power station. ”

"Where's that stuff?" Song Ziyu asked.

"I have it!" The old man said mysteriously.

"Who are you?" Song Ziyu asked curiously.

The old man said: "No, old man, I am a retired engineer of the Nandu Thermal Power Plant. ”

"Nandu Thermal Power Plant?" Song Ziyu was stunned, because the thermal power plant had been demolished many years ago, and the plot was used for commercial real estate.

"The pollution of thermal power plants is so serious that big cities like Nandu do not allow it to exist, so it has become history...... However, the drawings of the thermal power plant are still there, if you are interested, I can sell them to you at a low price. The old man said.

"Are you short of money, old man?" Song Ziyu asked.

The old man sighed and said: "After the thermal power plant was abandoned, my wife and I were laid off, I didn't think it was a big deal back then, but now I am getting older, it costs money to see a doctor, and it costs money to renew my life, and my son is running for five, and he is still an old single, just because he has no money to give a bride price......

The old man recounted with a handful of snot and tears.

Hearing the old man's words, Song Ziyu's heart was sour, so he said: "I bought the drawings, and I want them now." ”

……

With enough books to buy and the engineering drawings of the thermal power station that the old engineer transferred to him, Song Ziyu traveled back to the wasteland world overnight.

After a night's rest in the hotel, Song Ziyu went directly to visit Gongsun Shuren and Gongsun Congyun the next day.

Gongsun Congyun was meeting guests, but when he heard that Song Ziyu was coming, he took the guests directly to the study.

Gongsun Congyun wanted to see how much surprise Song Ziyu could bring.

When they saw the books and drawings brought by Song Ziyu, whether it was the father and son of the Gongsun family or the strange guest, they all showed surprised expressions.

"These?" Gongsun Shuren also didn't quite believe his eyes.

Books......

Books are precious in this wasteland.

Civilization has been broken, and books are the only link between the previous epoch and this epoch.

When Song Ziyu put the book in front of Gongsun Shuren, the shock brought can be described as terrifying!

"These are all books on the application of alternating current, and I believe that with your knowledge of electricity and electromagnetism, it is not a problem to integrate these knowledge." Song Ziyu said to Gongsun Shuren.

Gongsun Shuren's scalp was numb, and he couldn't be relieved for a long time.

Song Ziyu didn't care about this, and opened the heavy cowhide document bag again.

Huge engineering drawings are presented in front of Gongsun Shuren!

The old man's eyes have completely lost focus!

"This is a drawing of a thermal power station built using an AC motor, as well as an AC grid wiring laid in a supporting package...... Everything is on the map, and the building proportions and symbols are explained in detail...... If you use this thing to draw a scoop in the same way, you can build the same alternating current thermal power plant! Song Ziyu said.

Love to read

Gongsun Shuren put on reading glasses and threw himself on the drawings and began to study inch by inch.

"How can it be so concise?" Gongsun Shuren couldn't help but exclaim.

"How is it possible to construct a transmission grid like this?" Gongsun Shuren shouted.

At this time, Gongsun Congyun was not calm, and he left the guests and began to study it carefully.

Really!

Gongsun Congyun turned out to be a technical leader.

Song Ziyu was slightly surprised, no wonder Sweetwater Town stood out in the wasteland.

People have the technology!

……

It took a long time for the grandson and father to climb out of the drawings.

The father and son exchanged glances, Gongsun Congyun nodded, and then said to the guest: "President Xu, my family has something important today, and we will talk about your questions in detail tomorrow, okay?" ”

The guest called President Xu was a middle-aged man in a gray robe, and the pestle didn't seem to have any presence there, until Gongsun Congyun greeted him, and Song Ziyu didn't react, it turned out that there were other guests in the house.

"Okay, I'll give you time to consider my proposal, and I'll come back to you tomorrow!" The middle-aged man was neither humble nor arrogant to Gongsun Congyun, and said.

Then the middle-aged man looked at Gongsun Shuren and said, "Elder Ren, the younger generation will retire first." ”

"Well, you walk slowly." Gongsun Shuren didn't seem to be interested in middle-aged people, and he didn't raise his head.

The middle-aged man glanced at Song Ziyu curiously, didn't say hello, and then walked straight out of the room.

This person is a little familiar, have you seen it somewhere?

Song Ziyu wondered.

However, Song Ziyu did not have the energy to delve into these issues.

Song Ziyu looked at the father and son of the Gongsun family.

"How's it going, are things quite satisfying?" Song Ziyu asked.