"Your Highness, what are you doing here?"

I saw Li Chong there for a while.

Xiaoxiao naturally couldn't understand what Li Zhong was doing.

In fact......

He's making differentials.

Differentials are difficult to say, simple to say, but actually simple.

Previously, Li Chong had already gone to ask his sister for some tools.

Now......

It's time to get your hands on the differential.

Later......

I guess I'll be able to get on a four-wheeled car.

Not......

Come to think of it, it's a little exciting.

After all......

It's definitely a whole new experience.

It's a perfect combination of ancient and "modern" style.

Although......

In fact, his current words are already blowing an electric fan.

But I don't think it's enough to just be an electric fan.

"I'm making a differential."

"Differential?"

"Yes!"

"What's that?"

"You don't understand it, but when I'm done, you'll understand."

Of course!

Before that, Li Chong also did a lot of "homework", such as......

He also ran to his sister's dormitory, and then affectionately asked his sister how to do this gear.

Li Bao'er told him all the methods.

Finished!

Li Chong ran away again, and after she saw Li Chong running again, she also said, how mysterious and secretive.

Three months of preparation time.

I guess that's pretty much it.

Li Zhong felt that it was time to have a showdown with his sister.

Don't pretend!

Actually, I'm a genius!

After the gears and stuff are installed.

Of course!

The workmanship is still a bit rough.

Li Chong also took the model, so he went to find his sister.

It's just that......

During the day, his sister may not be there.

Then sleep in her bed and wait for her to come back.

It wasn't until four or five o'clock in the afternoon, that is, halfway through the Shen hour, that Li Chong waited for his sister to come back.

Maybe I slept too soundly, I can only say......

When I woke up, I felt like I was still drooling from the corners of my mouth.

Li Chong must not know at this time, his sister is already thinking about it, this pillow can't be wanted.

Also, how do you feel that after an accident, my brother suddenly became so clingy.

"Wake up."

"Hmm~"

Li Chong's face was full of confusion.

But soon, after sitting up, taking a deep breath, and then rubbing his face again, Li Chong came back to his senses.

"How do you sleep in bed?"

"Sister, you're back!"

Then......

The slave maid beside his sister also said, "County Lord, the emperor and grandson have had lunch since noon, and they are waiting for you to come back here."

"What are you doing when I get back?"

Li Bao'er also asked.

Li Zhong took his differential model from the side of the pillow, and then said, "Sister, look!"

All I can say is......

At first glance, this model doesn't tell anything.

"What is this?"

Li Zhong said, "I named it a differential!"

"Differential?"

Li Chong said, "I'll show you a demonstration, and you'll know." It took me at least three months to come up with it. You see...... This!"

Followed by......

Li Chong showed her one by one, if

When it's a straight line, it's like.

What happens when you hold down one wheel?

All I can say is......

His sister is still not very sensitive to this aspect of things.

As stupid as Li Li.

But he showed it, if it's a turn...... You can make one of the wheels spin very slowly, or even not move at all, without affecting the car to continue moving forward.

Li Bao'er reacted immediately!

With a look of enlightenment, he said, "How did you come up with it?"

Li Chong: "Set aside a little time every day to think about it, and I came up with it. Sister, do you think I'm a genius?"

Then Li Bao'er pinched his face.

said, "You're more than a genius! You're a ghost!"

"But you can even think of something so complicated?"

Li Zhong looked at her with a little skepticism, and said, "Is this complicated? I think it's pretty simple."

"That's right! I have another brilliant idea!"

Li Bao'er: "What?"

Li Chong: "You see, I usually ride a horse, what if I encounter rain?"

Li Bao'er: "Then find a place to rest."

Li Chong: "Even if you ride in a carriage, if it rains, it doesn't feel good."

Li Bao'er: "So what do you want to say?"

Li Chong: "So I think maybe we can make a car that has four wheels, and then all of them are closed, and even if it rains, you are not afraid of it, and you can still drive on the road."

Li Chong continued to take out a picture.

Li Chong: "Sister, look, this is the design I came up with."

If Li Chong didn't have three months of study and research, if he came up with these things all of a sudden, it would definitely surprise the other party.

But......

Now that Li Chong has been reading the information for three months, it will not be surprising at all even if he comes up with such an idea.

Li Zhong told her little by little about the rough details of this.

"It's all iron outside."

"Then leave four windows here."

"This car has four wheels."

There is no technical thing at all, it's just an idea.

And......

Before that, there were already cars on three wheels.

Li Bao'er was also a little incomprehensible, and asked, "Why do you have to have four wheels?"

Li Chong also said, "Sister, don't you think that three wheels are easy to overturn?"

Li Bao'er savored it carefully......

It seems that this is indeed the case!

I just didn't expect it......

He even knew these details.

In fact......

It's not that hard.

Because in his dormitory, there is a children's tricycle.

He has also stepped on it in the past few months.

If you turn too big or too fast, you may roll over.

Of course!

In fact, three wheels are also better than three wheels, that is, when turning, relatively speaking, it is not as laborious as four wheels.

In fact......

This steering wheel turning system has to be overcome slowly.

But this, Li Chong will not participate.

After all......

It would be a bit against the sky if you thought of this again.

Let's see how well they do their research.

And to be honest, he didn't know.

He really hasn't studied this.

If he knew, he would have brought it up a hundred years ago.

A four-wheeled car, like a steam tractor, must have steered

It's going to be difficult.

When the time comes......

How to save this force is the task of the craftsmen of the Academy of Sciences.

"I didn't expect you to become so smart after a serious illness!"

I saw that his sister also looked at him in the end.

Li Chong replied, "Is it possible that even if I am not seriously ill, I am still so smart. Sister, then I have made such a great contribution, should you reward me?"

[In view of the general environment,

"Yo, what do you want?"