"oh?"

Cao Peng also became more energetic.

He naturally knows his drawings very well.

He just drew the prototype of the bellows based on his memory. To be honest, this drawing was not perfect.

After thinking for a while, he said: "Miss Wanzhen also saw it. My father is a blacksmith. My father has always wanted to forge high-quality swords, but unfortunately he has never succeeded. I saw that my father was anxious, so I wanted to help.

Help him. Later I discovered that the stove prong can increase the temperature of the fire, so I thought, if I could blow stronger wind into the stove, would it increase the temperature of the fire and make a good knife?

Once, I saw a book with this sentence in it: Between heaven and earth, is it just like a bellows? It is empty and unyielding, moving and getting better... So, I combined the characteristics of the bellows and designed this bellows.

.It’s just that, as you can see, it’s not perfect so far.”

This sentence comes from "Laozi-Tao Jing".

Zhang Wanzhen has obviously read this book, but just hearing it from Cao Peng still surprised her.

"I didn't expect that Mr. Cao is still a filial son!"

There was deep appreciation in Zhang Wanzhen's eyes.

She stretched out her hand and asked, "Can I let the little lady take a look at the drawings again?"

This seems like an expert!

Cao Peng did not hesitate this time and took out the drawing and handed it to Zhang Wanzhen.

"Hehe, this picture of yours is really interesting. I wonder what you used to draw it?"

"this……"

Cao Peng did not hesitate this time and took out a charcoal pen from the leather pocket.

"This is the charcoal pencil I made myself... Haha, it's actually very simple. Just take the burned charcoal and cut it into this shape and then use it. It's just for the convenience of drawing, and it doesn't have much use at ordinary times... Actually

, I have a better way."

"any solution?"

"Take a goose feather, write it on a hard rod and peel it off, then dip it in ink and you can use it."

"Really?" Zhang Wanzhen looked curious, with a strange light shining in her eyes, which made Cao Peng's heart beat faster again.

"Then when I go back, I must give it a try."

As she spoke, Zhang Wanzhen took the charcoal and walked to the case, staring at the drawings, looking left and right...

"Actually, I already had some ideas on the way.

I'm just not sure what the purpose of this object is, so I didn't think about it further. Although the young master's idea is slightly different from my guess, it is basically the same.

Sir, look, I added a spout on each side of the box. When the lever is pulled out, the air is sucked in from one spout, and then when the lever is pushed, the air is sucked in from the near side... Well, inward and outward.

The push and pull process involves sucking the air into the box, pushing it out from here, and spraying it out. It's roughly a process like this. I don't think the problem will be too big, but I still need to try it."

Cao Peng didn't understand a word Zhang Wanzhen said.

But judging from the graphics she drew on the hemp paper, it seemed quite reasonable.

In fact, this blower box is a very simple and clever design. Those who know the art can see the clues after thinking about it.

Of course, it is not impossible to achieve this effect through evacuation.

It's just that the cost of the exhaust rack is too high, and the operation is very complicated. Compared with the blast box, it seems a bit flashy...

Cao Peng did not notice another sentence from Zhang Wanzhen: Although it is different from my guess, it is roughly the same.

In other words, what Zhang Wanzhen was thinking of was another use of bellows.

As for this usage, Cao Peng only paid attention to it later...

"Then if we find someone to build it, how long will it take?"

Zhang Wanzhen thought for a while, "Since you don't want others to know about this object, you'd better build it yourself, otherwise..."

"Build it yourself?"

Cao Peng is in trouble!

He doesn't know how to do carpentry, and he doesn't seem to be familiar with it at home.

How could Zhang Wanzhen not understand Cao Peng's difficulties, so she laughed and said: "Mr. Cao, if you believe in little girls, let me build it."

"you?"

"Are you looking down on me?

I have specialized craftsmen in my family who are all very loyal.

I'll let them build it, so you don't need to worry about leaking it... Of course, this requires Mr. Cao to trust the little girl."

Cao Peng did not hesitate this time.

"Then please!"

If someone can think through something he can't understand, then there's no point in hiding it.

Now that Zhang Wanzhen has spoken, she has given Cao Peng enough respect. In fact, if she didn't get Cao Peng's consent, she could still build it herself when she returned home.

Now that she has spoken, it means that she has no other intentions.

The smile on Zhang Wanzhen's face grew stronger, and she held the drawing in her hand, "Then I'll take it with me."

"Please!"

"Then, I'll go back first...if I don't leave, my father will be in a hurry."

As she spoke, she put away the drawings and walked out of the hall. When she walked out of the hall, Zhang Wanzhen suddenly stopped again, turned around and asked with a smile: "Mr. Cao, can I ask you one more thing?"

Cao Peng said: "What's the matter?"

"Do you practice martial arts on the river beach behind your house every day before dawn?"

"how do you know?"

"Hehe, my father said that the boxing skills you practice there every day are very interesting! The little girl is also very curious. I wonder if I can take the young master as my teacher?"
Chapter completed!