At first, Lan Shang thought it was just a whim and a joke, but when he saw that he really made the so-called soap, he became very curious.

"General, what is the use of this thing?"

Li Lanshang asked everyone's feelings.

Qi Si grabbed a lump of irregular soap and said, "You can wash the dishes."

"Washing the dishes?" Everyone looked at each other.

Qi Si nodded, and ordered the servants in the kitchen to bring a few dirty bowls to the yard, fetch two basins of clean water, and wash the soap in one of the basins until bubbles appeared.

"Try it now," he said, pointing to the basin of soapy water.

"I'll do it." A servant who was helping in the kitchen volunteered, picked up a large bowl and put it in soapy water to wash it, and let out a cry as he washed it.

"What's wrong?" the servants asked curiously.

Qi Si was also a little nervous. After all, it was his first experiment, and there was a big gap between the theory in the book and the actual operation. If he didn't succeed, he would be embarrassed.

"It's not greasy at all!" The dishwashing servant said, and according to what Qi Si said, he put the washed dishes in another basin of clean water to rinse, and then showed them to everyone.

The white porcelain bowl is as bright as new, and there is no oil stain on it.

"It's amazing." The servant said, "Usually this kind of dirty bowl has to be washed with boiling hot water to remove the stain, and it has to be washed several times. I didn't expect to use soap to wash it clean once."

"Let me try." Another servant rolled up his sleeves, picked up another oil bowl and washed it in soapy water, and it was cleaned quickly.

All the onlookers exclaimed: "It's amazing!"

"The general is amazing."

"The general can not only go to battle to kill the enemy, but also invent magical things. It's like a god coming down to earth!"

"Yes, yes, the gods are alive and omnipotent!"

Everyone praised Qi Si without hesitation.

"It's easy to say, easy to say." Qi Si was extremely calm on the surface, with a confident air, as if everything was under control, and secretly wiped away the sweat in his heart.

"If it's just washing the dishes, I'm afraid it's not appropriate to spend so much time." A sudden voice broke the joyful atmosphere.

Li Lanshang's voice.

Everyone turned their heads to look at Mr. Li who dared to tear down the stage.

Qi Si was also a little surprised.

Li Lanshang did not flatter like other people, but questioned, "Making soap is time-consuming and labor-intensive. It needs to consume lard and alcohol, just to wash the dishes. Isn't it too wasteful?"

In a big family, there are special servants who wash the dishes, and they spend manpower and material resources to make soap for the convenience of the servants. Isn’t that full of food?For ordinary people, buying soap to wash dishes is a waste!

Everyone thought, yes, Mr. Li is right.

So they turned their attention to Qi Si again.

Qi Si took it easy, "Ziwen's question is very reasonable, if it's only used for washing dishes, it would be too wasteful."

Everyone: ...You mean this thing is a waste of superfluous actions?

Under everyone's puzzled eyes, Qi Si said, "Soap can be used not only for washing dishes."

"Then what else can you do?" one of the servants blurted out.

Qi Si looked around at everyone, held up a piece of soap and said, "The main function of this thing is to remove oil stains, so it can not only wash dishes, but also wash clothes and scrub other oily things."

He glanced at the maid beside him, and said, "The soap can be used to wash your face, and it's very clean."

The maid hesitated and said, "General, is it true? On a hot day, my face tends to sweat and is greasy all day long. It would be great if you could wash my face clean."

"You can try it." Qi Si handed the soap in his hand to the maid, "Your reward, tell me how it works after you use it."

The maid smiled happily, "Thank you, General, for the reward."

Seeing the maid getting the soap, another servant hurriedly stood up and said, "General, can I have a piece of soap? I sweat a lot, and others say I stink..."

He twitched, "I don't know if soap can take a bath? Is it cleaner than soap?"

Qi Si smiled and said, "Of course."

Grab one of them and hand it to him, "Your reward."

"Thank you, General." The servant smiled.

Seeing this, other servants stepped forward to ask for rewards, Qi Si was not stingy, and handed them out one by one.

Li Lanshang shook his fan and said with a smile: "Soap has so many functions, general, you are really a genius."

"Don't dare to act, dare not act." Qi Si said modestly.

It's not easy for Li Lanshang to praise him as a genius.

The servants took the soap back to experiment, and found that the effect was as Qi Si said. They were very happy, and reported the use of the soap to Qi Si the next day.

Qi Si issued a sealing order, and the servants were not allowed to spread it around, and they were not allowed to take it out.While exercising to lose weight, he continued to develop soap formulas, striving to be as good as they could be.

In order to make the formula more accurate, he and Li Lanshang led the staff to experiment every day, and based on the experience of the experimental class, they were divided into several groups for comparison, trying to find the best formula ratio.

After another two days, Qi Si finally found a good formula, which can be used to make soap with a small amount of lard or animal oil. At the same time, he also discovered that there was a plant called elephant grass in the Dayu Dynasty. Plant ash is very alkaline, and it is widely distributed, and it grows very luxuriantly, and the growth rate is fast, which can greatly save costs.Of course, if alkali ore can be found, the best lye can be refined from alkali ore. However, the business of mining ore required a lot of manpower, material resources and luck in ancient times, so let's give it up for now.

These few days Qi Si was obsessed with making soap, and even his cheap son Qi Yuanfeng was brought to visit, but Qi Yuanfeng was not interested in soap at all, he only liked bamboo dragonflies and various snacks.Qi Si didn't restrain him in the later period and let him play in the mansion.As a result, the servants were called by Qi Si to do the soap experiment, and only one boy was left to watch Qi Yuanfeng, and this boy got into trouble and punctured the tiger skin in the main hall.

The things in the main hall are all the glory of the Qi family, with extraordinary origins, the brat broke the tiger skin, almost made the housekeeper faint, and insisted on Qi Si punishing Yuan Feng.

"General, this tiger skin is Beirong Tianyan tiger skin. It is very precious. It was obtained by the old general when he killed the enemy and captured the spoils. The old general loved this tiger skin very much when he was still alive. He often touched and played with it. Now..." The housekeeper said Holding the tiger skin with grief and anger, his fingers trembling, "Look, look, there's such a big hole!"

Qi Yuanfeng lowered his head and remained silent.

Qi Si looked at the tiger skin with a big hole in it, and felt a little distressed. Thinking that he hadn't warned Qi Yuanfeng before, it's normal for children to be playful, so he said, "Forget it, forget it, it's just a tiger skin."

It can't be done if it's broken, and it can't be repaired anyway.

Butler: "General!"

Qi Si waved his hand, signaling him not to talk too much, and then taught Qi Yuanfeng a lesson: "Yuanfeng, don't touch things randomly, and tell the housekeeper what you want. If you want to mess with things, you are not a good boy."

Qi Yuanfeng cried, "Father, I'm your son, why don't you let me mess with things at home?"

Qi Si: "..."

Being called dad suddenly was completely unbearable.

Moreover, Qi Yuanfeng was adopted by him, he was his son, and what he said was right, why couldn't his family touch their own things?

Qi Si has a big head.

After thinking for a while, he calmed down and said: "It's not that you are not allowed to touch everything, some valuable things are not allowed to be touched, you see, father and others don't touch those things..."

Qi Yuanfeng said angrily: "Did you not regard me as your son at all?" Qi Si was stunned, "..."

Although it is a fact, it cannot be said.

Qi Yuanfeng's eyes were red, "You really didn't treat me as your son!"

After saying wow, he ran away.

Qi Si: "..."

Even if you are your own son, there are some things you can't touch!To be honest, if it was his own son, he would have just started to spank his ass just now, so there is no need to worry about this and that, it is because he is not his own son that he should be careful.

Qi Si had never raised a child before, so it was a headache.

Cheap son was crying and fussing, he couldn't beat and scold him, so he could only chase after him to coax him, and it took him a long time to make the child stop crying.

The more he coaxed, the more trouble the child made, insisting that Qi Si give him the knife enshrined in the main hall, and the brat would use that knife to pierce the tiger's skin.

Qi Si refused, so Qi Yuanfeng cried again, wanting to go home.

Qi Si had a headache.

"housekeeper."

"Master."

"Go and inform Second Uncle, tell him that Yuanfeng wants to go home, come and pick him up."

The housekeeper froze for a moment, glanced at the crying bear child, and said loudly, "Yes."

Qi Yuanfeng stopped crying, sobbing, "Father, don't you want me?"

Qi Si looked calm, "If you want to go home, I will let you go back."

Qi Yuanfeng stopped crying, "I...I don't want to go back."

"Don't cry if you don't want to go back." Qi Si squatted down. "In the future, tell me what you want, and I will arrange it. Don't mess with the things in the main hall, okay?"

Qi Yuanfeng wiped away his tears and said sullenly, "Okay."

Qi Si: "Housekeeper, take Yuanfeng down and ask Mr. to teach him how to read."

The butler stretched his eyebrows and answered in a low voice.

Qi Si no longer took care of Qi Yuanfeng's affairs, he had never raised a child before, so he didn't know how to educate the child.Qi Yuanfeng made such a fuss, which made him want to send the child back even stronger.

The time has finally come to the end of the month.

On this day, Qi Si got up early in the morning, took a shower after a morning run, and sat in front of the vanity mirror to tie his hair.

Looking up at the mirror, I subconsciously wanted to count the pimples, but found that the face in the mirror was smooth and delicate, without a single pimple.

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