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

Yin Xuan met their eyes and spread his hands: "Look at what I do, I have limited conditions."

"There is only one kiln for baking bread."

"I don't have the finished product here."

"The method has been taught to you, and whether you succeed or not depends on your own hands and hard work."

The expressions on the faces of the four little girls froze.

Fang Yiyu was even more confused.

What?What are these?

Just said a theory, and then handed over the matter to them?

Li Lizhi sighed: "I knew Brother Zhengyang was going to do this, I know, I know, this time we must fight for two months to get the results out."

Li Shu also nodded.

Yin Xuan shook his fist at them and gestured: "I wish you all success!"

This kind of attitude of throwing away the shopkeeper.

Fang Yiyu wondered why Li Lizhi and Li Shuhui had so much confidence in Yin Xuan. She turned her head to look at her eldest grandson, only to find that this was later like herself, and her little face was as red as those two little girls.

She rubbed her forehead and sighed.

Forget that this is a silly girl.

Today, the little girls left the restaurant very early, and they haven't seen Zhou Xiaosan and the others for a long time. This made Li Lizhi and Li Shu very relieved that no one would take Zhengyang brother badly.

They made an appointment to go to the imperial city together to figure out how to make this thing called cement.

The Qianniu Guards disguised themselves as coachmen, moved the ore from the backyard of the restaurant, and took it to the imperial city.

On the road.

The carriage bumped, and Fang Yiyu's mood also bumped like the carriage.

During this period of time, she was still very obedient and listened to her father, she didn't have much communication with Yin Xuan, and she didn't feel much about Yin Xuan.

But she has studied those knowledge seriously, whether it is mathematics, physics, chemistry, or geography that she studied with Li Tai.

It gave her a refreshing feeling.

Also, it's scary and unbelievable.After all, the earth is round, so these silly girls who completely believe in Yin Xuan will believe it.

There is no way to verify the success, Fang Yiyu still has some doubts in his heart.

Um.
This is also the knowledge she learned from Yin Xuan.

"Do you trust the store so much?" Seeing Li Lizhi and Li Shu chattering about burning cement, Fang Yiyu asked.

Li Li asked back: "Brother Zhengyang can be wrong?"

Fang Yiyu paused for a moment, then pursed his lips: "I mean, the shopkeeper didn't show the finished product, how can he prove that he is correct."

"And it only told us the ingredients, but didn't tell us the specific formula ratio."

Li Lizhi snorted: "My sister came late after all, I don't know Zhengyang brother well."

Li Shu helped to add: "Brother Zhengyang brought out the things that he had demonstrated successfully. The reason why he didn't specify the ratio is because he wanted to make us understand more deeply."

"My sister and I were studying fireworks and firing colored glaze. Brother Zhengyang only told us the main ingredients, but didn't say the specific ratio."

"We explored step by step and researched step by step. During this period, we had a deeper impression on gunpowder and glass."

"It's like making several papers and eating all these knowledge points into the stomach."

"If brother Zhengyang only told us the answer, we only know what it is and don't know why, wouldn't we lose the fun of learning this knowledge?"

Fang Yiyu nodded.

It seems that it really makes sense.

She still had some doubts in her heart, but she didn't say it out, and planned to take a look at it later.

Arrived at the imperial city.

Li Lizhi and Li Shu took the other two little girls with ease and went straight to the back garden. The earthen kiln was ready-made, which saved them the effort of building another kiln.

Limestone, clay, iron powder.
These things are also very well prepared.

The first furnace didn't have the intention of success, but just thought about what it would be like when it was fired. The raw material was ground and carefully put into the furnace. After an hour of roasting, the clinker came out of the furnace.

After cooling down, add gypsum, slag, and coal ash powder, and stir together.

One. Let's name it with cement, and it was fired.

"Is this the cement Brother Zhengyang said?" Looking at this whitish thing, Li Shu was a little silent. After all, according to Yin Xuan, the color of the cement is gray.

This white thing has nothing to do with the mud anyway.

"Try it." Fang Yiyu also hesitated, touched his chin, and sighed.

Add water and stir well, and it will become a paste after a while, but there is no sign of condensation, and it just spreads on the ground, exuding a pungent smell.

Not discouraged, the little girls rolled up their sleeves.

Come again!

This time, they adjusted the formula. For the first time, the formula ratio was one to one. This time they increased the amount of clay and limestone.

After cooling down, add gypsum and coal ash powder to grind together.

The powder that comes out has a dusty color, which surprises the little girls. Could it be that they will succeed in firing the second time?

Add water and stir well, it is still a paste, but like the previous time, after waiting for a long time, there is still no intention of congealing.

But, things like cement shouldn't harden quickly?
Why is it so slow?
The little girls were not in a hurry to start the third furnace, and now there was not enough time for the third furnace to be fired, and it would be midnight if the fire continued.

They turned their heads and looked at the things that were burnt out the first time, and they were still twisted in their original positions. Li Lizhi didn't ask anyone to clean them up.

In the test process, failed products are also a very important link.

"This one here is starting to condense now." Li Lizhi squatted down, stretched out her hand and pressed it, making a mark, and there were still some white and sticky things on her hand.

But this kind of touch is much harder than the previous one.

The other three little girls also squatted down.

Li Shu stared at it for a while and thought about it: "Brother Zhengyang said that this thing has a quick-drying and hardening effect, and it can prolong or shorten the setting time according to the different proportions, so in the materials added later, Could there be a material that slows down the rate of condensation?"

"The reason why it hasn't started to condense now is because we added too much of that material?"

Her words sparked a flash of inspiration in the minds of the little girls.

It's really possible.

But which material is to blame for the slow condensation?

They began to think about it, let the eunuchs and maids keep these things, and went back to the palace to wash and sleep—it was too late, and the eldest grandson and Fang Yiyu couldn't go home, so they could only make do in the palace, hugging Li Lizhi , or hold Li Shu.