When William brought Arthur into his showroom and made a cup of black tea for the middle-aged man dressed in a very old-fashioned manner.

Hermione, who was standing on the sidelines and silently watching the whole process, was puzzled. When the middle-aged man began to taste the black tea, she finally couldn't help but speak.

"Doctor, who is this gentleman?"

Burst~

Arthur was surprised to hear that the little girl in the exhibition hall could actually see him, and spit out the black tea that he had just drunk in his mouth. Seeing that his behavior was very rude, he quickly apologized to the two children and introduced himself.

"I'm sorry, I'm sorry. My name is Arthur Weasley. It's a clerk on the next street. ”

"Mr. Weasley, I'm sorry I forgot to check the water temperature and burned you. By the way, this is my sister Hermione. ”

William gracefully took out a tissue from under a booth and handed it to Arthur Granger. Hermione was then introduced to Arthur.

"Hermione, say hello to Mr. Weasley."

"Hello Mr. William. I'm so sorry that my brother doesn't check the water temperature every time he makes tea. ”

Hermione gave her brother a vague glance, and then greeted Arthur very warmly and politely.

Arthur smiled apologetically and wiped the water stains on his body with the tissue William handed over, while feeling a little depressed in his heart.

The spell on his body hasn't been lifted, huh?

The fact that a little boy could discover his presence was already very incomprehensible to Arthur. Now there's another little girl. This made Arthur's curiosity even stronger.

I desperately want to know what is so special about the two of them, and I can actually detect his presence in this vast crowd.

He held the white teacup in both hands, carefully savoring the sweetness of the black tea in the cup, while his eyes looked around the exhibition hall of the two children.

Strange equipment...

fast-moving toy trains floating in the air; A toy dog that automatically greets someone whenever they pass by......

What surprised Arthur the most was the rectangular object in the center of the booth, like his mother's oil painting, in which the characters were not only moving, but also sounding.

But Arthur found out that it was not an oil painting, nor a photograph, but a very thin piece of paper, but why did the people in it move?

He hadn't detected any signs of magic potions on it.

It's not a television in the Muggle world. The TV looks like a box...'

As a wizard, it is forbidden to use Muggle items, but Arthur is very curious about all things Muggle world, and although he does not have a television of his own, he has seen this magical device when he is on a mission.

But Arthur's device was an eye-opener for him. It's not just this device, there's more.

On the suspended train, he felt no trace of the levitation charm.

A puppy that greets people, and he has no trace of a puppet spell that he feels.

All the other strange devices, Arthur didn't feel any traces of magic from them.

How the hell did he do it? ’

Arthur was shocked by all the items on the table in the gallery, and he thought he was the wizard who knew Muggles best, but when he saw the objects displayed by the kid named William, he began to doubt himself deeply.

"Huh? Is that! ”

Arthur saw that half of the black tea in the cup had been drunk by himself, and he was about to ask William to help him explain these magical items, but then his eyes accidentally saw the book in the hand of the little girl sitting in the corner of the exhibition hall.

Hogwarts, a piece of school history!

This little girl is actually watching 'Hogwarts, a piece of school history', she can't be this year's freshman, right? I guess so, or I wouldn't have noticed it. Then William, as a sibling brother, can see me, and this has been recorded before...'

Seeing Hermione carefully reading the history of Hogwarts, Arthur was stunned for a moment, and his doubts about William's ability to perceive him were also solved.

"Mr. Weasley, what's wrong with you? Is it that the black tea I brewed is not to your liking? ”

While Arthur was silently observing his surroundings, William was also observing Arthur. When Arthur saw the book Hermione was holding, William's heart hung in the air.

In his plan, as long as Arthur noticed that Hermione was a new student at Hogwarts this year, he would definitely dispel his suspicions about himself.

Now that the first step of the plan is complete, it's time for the next step.

"Hehe, it's not. William, your black tea is delicious, even better than my wife's. By the way, can you explain it to me... These items... How did you invent it? ”

Hearing William's inquiry, Arthur hurriedly withdrew Hermione's gaze and smiled kindly, asking William to explain to him why these strange devices could have the same function as magic.

"This... No problem, Mr. Weasley, which little toy would you like to know? ”

William smiled indifferently and pointed to the small toys on the booth that he had nothing to do... Maglev trains, mechanical dogs, LCD screens, drones.....

"This, right? I remember that the TV was a big box, how did you manage to make a piece of paper have the ability to display a portrait? ”

Arthur took a closer look at the equipment on the stand, which were strange to wizards, and finally decided to learn about the equipment that was as light as tissue paper, like magic photographs and oil paintings.

"This is a kind of liquid crystal screen, but it is not a common thin film transistor liquid crystal display screen, it is a flexible organic laser display screen, or it is called a flexible organic light-emitting semiconductor ......"

Seeing that William was interested in his flexible display, William smiled slightly and began to explain to him, as for whether Arthur could understand it, he didn't care at all.

Leaving Arthur's brain in a state of confusion and fog is what William wants.

As for the flexible organic laser display (OLED) screen he explained, it is a screen panel commonly used in curved screen mobile phones in the 21st century.

This kind of OLED screen was officially industrialized around 2013. At the end of the 20th century, in 1991, this technology only existed in laboratories, and most of the liquid crystal displays used on the market were thin-film transistor liquid crystal display screens, that is, TFT-LCDs.

Interestingly, in 1991, an island nation in the Far East began a large-scale expansion of the TFT-LCD production line. And William, who has the mature technology of OLED, how can he make the island country make the world's money.

He has applied for a patent for his OLED technology secrets, and at the same time entrusted his partner Uncle Tom to set up an OLED production line.

As long as the island country announces that it can meet orders from all over the world, he will ask Uncle Tom to release the news of OLED.

Let the island country lose his wife and fold his soldiers, and the dumb people can't tell if they have bitterness in eating Coptis chinensis.

Of course, this is just some kind of fun on William's part, and he doesn't put all his efforts into this.

Studying Hextech and letting Muggles master magic was what he longed for most.