I am the cook, but I am Li Er's son-in-law

The Yizhou branch has gradually spread some reputation.

However, the system still failed to unlock the first level of fame.

The chess holy war in Chang'an City is in full swing, Yin Xuan doesn't pay much attention to this, unless it's the final, he thinks it's best for him to stay in the restaurant.

The little girls stayed in the restaurant after they finished the fun.

They are not very interested in Go, so instead of watching others play Go, they might as well go back to the restaurant and do a few more math problems.

Yin Xuan has been quiet for the past few days, but he has thought about many issues.

First of all, the gun-making thing.

Man, Jiuer found it, but got stuck at the first step. To be honest, Yin Xuan never thought about this problem-that is, seamless steel pipe.

Firearms must be made of seamless steel pipes, otherwise, when the gunpowder is excited, the huge chamber pressure will instantly break through the weak points, causing the chamber to explode.

Pull the trigger and beat myself up?

On the contrary, Yin Xuan felt that the spring that would block them for a long time was successfully manufactured, but the strength was a little weaker, and it could be used to make guns.

Yin Xuan really doesn't know how to make seamless steel pipes.

He didn't dare to understand either.

I can only teach Jiu'er some of the knowledge I have learned, and then teach those blacksmiths, and let them ponder it slowly.

Fortunately, there are so many minerals, the materials are not scarce, and there is no need for too precious minerals to make steel. Yin Xuan has the patience to wait slowly.

The second is the running around of horse-drawn carts and bullock carts, which is really annoying.

You can build a parking lot yourself.

But the land of Huaizhen Square is only that big, and things like carriages are too big.

Gotta get a vehicle out.

Cars... Yin Xuan doesn't want to think about it for the time being, there is still so much to go before getting out the steam engine, it is not realistic to get out these means of transportation in a short time.

There's nothing wrong with the bike, though.

The technical content of the bicycle is not very high. Whether it is the chain or the body, it can be easily completed with Datang's current technology.

The biggest problem is that there is no rubber.

No rubber means that tires can still only be made of wood.Speaking of which, rubber tires are actually a very important thing.

Rubber is made of tires, and the biggest function is shock absorption.One is to make driving more comfortable, and second, it can also extend the overall life of the bicycle.

Shock absorption is not only for people, but also for cars.

Otherwise, it is easy to happen, riding, riding, suddenly the bicycle falls apart.Not being able to use it is a trivial matter, in case something indescribable happens...

Yin Xuan frowned, feeling a little trembling in his heart.

But it still has to be done.

After several little girls finished the papers noisily, Yin Xuan leaned over and asked with a smile: "The experiment of paper-making materials is still going on?"

Li Lizhi nodded: "Yes, we are now experimenting with juices from other plants."

"But unfortunately, there is no other material that can compare with carambola vine."

Changsun Mingyi said sternly: "I think I should try my idea."

"Impossible!" The remaining three little girls reacted strongly, and immediately slapped the table, their cheeks flushed.

"How could it be possible to use that kind of material!"

"It's ridiculous!"

"How dare you ask for that thing!"

The little girls resisted very much.

The eldest grandson shook his body and straightened his chest: "Why not, I just need something sticky. It's said in the book that something is sticky."

"no!"

Li Lizhi slapped the table again, blushing even more.

"Absolutely not."

"What's in your little head? Why do you think of that thing?"

The eldest grandson's face was also slightly red, and he poked his own hand: "It's what the book says, I think the nature of the materials is similar, so I think I can try it."

"Carambola vines are already very cost-effective." Li Shu took a deep breath to make herself look calmer, "All we have to do is record the properties of other materials."

As she spoke, she paused.

"It's a simple, easy-to-obtain material. What you said is too unrealistic."

Changsun Min nodded somewhat disappointed.

Yin Xuan looked at them and felt that the wheels of the car were running over his face, he was not so innocent that he couldn't understand what these little girls were saying.

He coughed twice.

The four little girls kept silent, lowered their heads, not daring to speak, for fear of Yin Xuan's questioning.

Yin Xuan is such a considerate person, he didn't ask any questions—of course, he was also afraid that there might be problems with eating green apples: "That means you are free now?"

Li Shu nodded: "It can be said that the matter of the material report will be done... It is the helper my father found for us, and Mr. Jiang Zuo can take care of himself."

After she finished speaking, she patted her chest, breathed a sigh of relief, and almost slipped her mouth, spit out the prisoner.

"Then I have something interesting now, are you ready to try it?" Yin Xuan pretended not to hear, squinted his eyes and asked with a smile.

interesting stuff?
The little girls nodded.

Yin Xuan pulled a piece of paper and began to draw with a brush. Of course, he only drew a draft, indicating how many and what parts the bicycle is composed of.

Yin Xuan didn't mark the specific size and model - he really couldn't remember the specific parameters. When he was playing bicycles, he didn't pay much attention to these things.

But it doesn't hurt either.

Gotta find something to do for these little girls.

After Yin Xuan finished drawing, he drew a whole picture.

Seeing this strange thing, the little girls were a little puzzled—they knew this wheel, but they only knew this wheel.

"This is... a new farm tool?" Li Shu hesitated for a while before expressing her opinion.

Looking at it like this, she always felt that a cow or a horse was missing in front of her.

Yin Xuan shook his head: "No, this is a means of transportation."

Transportation?
The little girls froze for a moment, they understood Yin Xuan's meaning, but no matter what, they couldn't quite connect this thing with the means of transportation—the carriage.

"How do you use this thing?" Fang Yiyu asked curiously.

Yin Xuan rubbed his hands together, and said softly: "It's very simple, isn't this a cushion, people sit on it, and then push the pedals, and they can run forward."

"This thing doesn't seem to stand up at all, it has no fulcrum." Li Lizhi muttered.

Yin Xuan patted her on the head: "Under normal circumstances, it is indeed impossible to stand up, but when you ride it, it will not fall down."

"I'll teach you this, as an after-school homework, first make the real thing."