Forcing me to keep vigil for your childhood sweetheart? Then I'll leave you.

"It looks like an ordinary brick, so why is it so strong?"

Prince Qing frowned, looking at his knife and then at the thing called cement, puzzled.

"Your Highness, what do you think of the effectiveness of this thing in repairing the city wall?"

Lin Yi did not tell King Qing the method directly, but asked him a rhetorical question.

"If it's not a triangular cone, then it's really a good thing!"

Prince Qing realized that Lin Yi was asking this on purpose, "Could it be that there are other shapes?"

"Of course, whatever shape Your Highness wants, we can have it."

“It’s not just for masonry, it can also be used as an adhesive.”

Lin Yi's eyebrows were beaming as he spoke, and Prince Qing's heart was instantly moved.

"How much is it per pound? Just tell me!"

"No, I'll tell you how to make it, and you'll pay me."

Lin Yi shook his head slightly, pretending to be conscientious. "How heavy is cement? If you sell it by the pound, Your Highness, even if you sell your house, it won't be enough to build the city wall."

Cement is not part of my business, but if I know the method, I can make it cheaply.

It’s enough to earn some “invention fees”.

It was heavy and labor-intensive, and compared to high-tech things like bicycles and woolen cloth, it was just garbage.

"So how much do you want?"

Prince Qing was naturally satisfied with this plan. "Or you can tell me first, and then we can negotiate a price."

"Let's finish up the instant noodles thing first."

Lin Yi waved his hand slightly, thinking that he also had to hand over the instant noodles recipe.

This month, Niujia Village produced about 2,000 kilograms of instant noodles and earned 800 taels.

At least we have to give the military some convenience.

"Instant noodles are actually very simple to make. All you need to control is the heat."

"First, make the noodles with flour, then fry them in oil for about..."

As Lin Yi said this, he saw Prince Qing was stunned.

Instant noodles are that simple?

It really lives up to the name of convenience!

"Write down the method, including how long and to what degree you want to fry it."

Prince Qing nodded with delight, "Then, can some vegetables and meats be fried in this way?"

"Of course, but I don't know the timing."

Lin Yi shrugged, indicating that he had never tried it before. "Bring me a pen and paper. I'll write it down."

After saying that, the housekeeper quickly brought out the pen, ink, paper and inkstone.

After writing for a while, Lin Yi put down his pen and said, "I hope His Royal Highness Prince Qing will not forget to publicize that this is my work, Lin Yi."

"Of course, the news will spread among the army, and the people will know about it later."

"You want to sell instant noodles to the people, and I won't stop you."

Prince Qing was delighted with the note and immediately had several copies copied and sent to the front line by messengers as a secret report.

Several messengers set off quickly on bicycles.

It was almost noon and the kitchen in Prince Qing's mansion had already started cooking.

"Then we should talk about this cement thing."

Prince Qing sat on a stone bench in the yard, an unstoppable smile on his face.

"Since I made 800 taels from instant noodles, I want 500 taels from cement."

After Lin Yi calculated for a while, he spoke slowly.

Don’t take less money!

"Well...you have to tell me how to use this thing first, then I can give you my price."

Prince Qing pondered for a moment and remained silent for a while before speaking.

“Before cement is formed, it is like mud and can be kneaded as you like.”

“And the materials needed are not very expensive.”

With just one sentence, Lin Yi "conquered" King Qing.

Such invulnerable strength, and the shape can be adjusted at will before it is formed...

Only five hundred taels? Isn't this a huge profit?

"Five hundred taels!"

Qing Wangjiu immediately agreed to the price.

Lin Yi also smiled in his heart.

Isn't it a huge profit to get five hundred taels for such a recipe?

Seeing Prince Qing pay the money directly, Lin Yi didn't waste any time and used the remaining paper to write down the recipe and process.

"what?"

Prince Qing was dumbfounded again, "Is this... how to do it?"

He couldn't believe that something so strong could be made from a pile of dirt and stones!

Even burning it won’t work!

Lin Yi is clearly trying to take advantage of others and fool them!

"I don't believe it unless you show me right now!"

"There's just rocks and dirt here, you do it now!"

Hearing this, Lin Yi looked at King Qing's face full of disbelief and could only nod in agreement.

"Build a big pot, and I need something to grind the stone."

Lin Yi immediately asked for tools and dug a big hole in Prince Qing's backyard.

The housekeeper and the servants were grinding stones on the side, while Lin Yi put all the ingredients into the pot.

He poured water in and started stirring with a stick.

Seeing this scene, Prince Qing felt like he was stirring a dung bucket, and suddenly felt like vomiting.

"Light the fire and start burning!"

After saying that, he lit a fire under the pot and Lin Yi continued to stir the "mud".

Not only was the stench overwhelming, but there was even some smoke flying out, making Prince Qing's backyard a smoky mess!

In order to find out whether Lin Yi could do it, Prince Qing could only squint his eyes, cover his mouth and nose and observe carefully.

As the cauldron boiled, Lin Yi kept stirring it, and the contents became thicker and thicker, looking more like shit!

"All right!"

"Wait until it cools down a bit, then you can use it."

Lin Yi poured the stuff directly onto the ground, stirred it with a stick, and then reminded the housekeeper, "Wait until it cools down a bit, then you can shape it and put it in whatever shape it will take."

After saying this, Prince Qing remembered that he had to have lunch, so he invited Lin Yi to have lunch with him.

"I tried it, and it might take five days to fully harden."

"Five days later, once you've confirmed the hardness, it's not too late to come back and pay me."

After washing their hands, Lin Yi and Prince Qing came to the dinner table together.

But he saw Chu Yaoyue coming back with a lot of women.

"Dad, I'm back."

After the routine words came out of her mouth, she looked at Lin Yi in surprise, "I was just looking for you!"

When Prince Qing saw this, he asked the butler to add more dishes and everyone sat down together.

"He is Lin Yi?"

“He is the one who made sanitary napkins?”

As the women spoke, they looked at Lin Yi curiously.

Chu Yaoyue nodded and introduced.

This lunch turned into a women's conference, making Prince Qing blush.

"Eat first. After you finish your meal, you can chat among yourselves."

Prince Qing frowned and pretended to be angry to cover up the shame in his heart.

In fact, when talking about sanitary napkins, these women's faces also blushed.

After dinner, Chu Yaoyue took the women to the backyard to chat.

"Yaoyue, why is your backyard like this?"

“It’s smelly and dirty!”

When they arrived at the backyard, these women covered their faces with their hands, revealing a hint of disgust.

"Oh, this is His Royal Highness Prince Qing asking me to help repair the backyard."

"Why don't we talk somewhere else?"

Lin Yi had a bit of embarrassment on his face and hurriedly explained that after all, it was he who did all this.

"Then go to the side room, butler, and bring some tea and snacks."

Chu Yaoyue made some arrangements and took the women to a clean and tidy wing room nearby.