Otaku Engineer in Great Tang Dynasty

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After hearing Jia Jiayin's words, Li Zexuan suddenly realized that he was still wondering why these students were still doing laundry at this point. It turned out that it was too slow to wash without the help of saponins!

The earliest ancient people used plant ash as a detergent, because it contains potassium carbonate, which can remove dirt from clothes. In addition, according to "Kao Gong Ji", it is recorded that when practicing silk, the columns are used as ash, and the silk is thickened. The mirage in this sentence is shell ash, which contains calcium hydroxide, which can be mixed with plant ash to generate potassium hydroxide. When it is immersed in water to wash silk fabrics, it chemically reacts with the oil attached to the surface of silk fabrics to form "potassium soap" , can wash silk fabrics clean and bright.

Later, the ancients in the Wei and Jin Dynasties began to use saponin and bath beans to wash their clothes. The saponin can generate foam in water and has decontamination properties. Later, Sun Simiao invented a new method of washing clothes, which is to wash the dirty blood on the pancreas of the pig, tear off the fatty liver on it and grind it into a paste, add soybean powder and spices, stir well, and air-dry in a ventilated place. It becomes a bath bean that can wash away the dirt from clothes.

"Okay, I get it~! But military training is a special period, and the conditions will naturally be tougher, so don't be too particular about it, as long as your clothes don't stink! After the military training, everything that should be in the academy will be available~!"

Li Zexuan said lightly.

At the beginning of the construction of the academy, some space was indeed reserved for shops, but he has been too busy to engage in "investment promotion", so apart from the cafeteria, there is basically no other place to spend money in the academy.

As for whether to make soap, it depends on whether he is in the mood.

"Yes, Mountain Chief~! The students understand~!"

Jia Jiayin cupped his hands and walked towards the dormitory.

Li Zexuan nodded secretly in his heart, thinking that although this child looks a little vicious, his temperament and knowledge are okay. Men, in the end, they still rely on talent to learn. In ancient times, there were many celebrities who were ugly but eventually stood out.

"Stand at attention~!"

After Jia Jiayin left, Li Zexuan roared loudly, and then said, "Start to stand in a military position, Pang Feiji, you come to supervise them, whoever behaves irregularly or is secretly lazy, give him extra time~! Do you understand~?"

Pang Feiji wiped the sweat from his forehead. There is a prince and two princes here! But Li Zexuan asked him to follow him, didn't this cost his life~?

"Huh~?"

"Yes~! I understand~!"

Under the pressure of Li Zexuan, Pang Feiji quickly agreed.

Li Zexuan nodded with satisfaction, and then said: "Well~! Starting from tomorrow night, after the 19th hour, you and other instructors must check the dormitory one by one, and find out who violated the discipline, just like today's punishment method. You are not allowed to sleep, do you understand~?"

"Yes~! Mountain Chief~!"

Pang Feiji's heart is bitter~! During the day, they were actually quite tired as instructors, but now that they are drafting like this, their rest time is much less!

......................................

Thousands of miles away, in the country of Japan, there is a mu by the mountain outside the capital of the flying bird.

"My lord, the king of the Japanese country sent an envoy to come here. We are outside the camp. Do you want to see me~?"

In the large tent of the central army, Li Xiaogong was looking at the big map on the table when suddenly a messenger came in and bowed.

Li Xiaogong raised his head and said lightly, "Let him come in~!"

"No~!"

After a while, a short man in a Japanese uniform walked in, bowed to Li Xiaogong and said, "Yoko Ono has seen His Royal Highness the King~!"

This sentence can be said in extremely pure Chinese, and it also has a Guanzhong accent. Li Xiaogong raised his eyebrows and said, "You can speak Chinese~?"

Yoko Ono bowed slightly and said, "The culture of the Central Plains is extensive and profound, and the Japanese nation is highly admired by all people in the country. I only rely on my late father Yu Yin. I have studied in the Central Plains for a period of time, so I can speak some Chinese~!"

In 607 AD, the first government mission sent by Japan to the Sui Dynasty in China finally arrived in Luoyang.

In 609 AD, Sister Ono came to China again as an envoy to send the Sui envoy back to China. It also brought a group of international students and monks. Yoko Ono was also among them at the time. Therefore, Yoko Ono knows a lot about the customs and culture of the Central Plains.

Li Xiaogong nodded slightly and communicated directly with a Japanese who spoke Chinese. He felt somewhat more comfortable. After a while, he asked, "What did Queen Tuigu send you to come here~? Why didn't she come to see this king in person~?"

Arrogant!

It can be said that Li Xiaogong's attitude is extremely arrogant! But Yoko Ono's expression only changed slightly, and she didn't dare to make any refutation at all.

"Go back to the lord, her dragon body is not very good, and it is inconvenient to leave the palace. I hope the lord will understand~!"

Yoko Ono said slowly.

"Hmph~! It's inconvenient to leave the palace~? Does she still want the king to go into the city to see her in person~?"

Hearing this, Li Xiaogong glared angrily.

Yoko Ono hurriedly made a look of sincerity and fear, and bowed down: "My lord forgives her sins, it is true that she is very old, and she has been in poor health recently, so she really can't leave the palace."

"How old are you? How old are you~?"

Li Xiaogong asked a very rude question, but who made him strong! Where there is strength, there is an uncle, a weak country has no diplomacy, and a strong country retains hegemony! This is what works in any era.

Yoko Ono noodles

With red eyes, he gritted his teeth and said, "Return to the lord, she has entered the age of old age this year~!"

(Sixty sixties, seventy since ancient times)

Li Xiaogong actually didn't know the age of the Queen of Japan at first, but after listening to it, he said "Oh" in surprise, and then said, "I see~! It seems that Queen Tuigu really wants this king to go into the city to see her~? "

When Yoko Ono heard the words, she was inexplicably excited, but she smiled flatteringly on her face: "When I came down, the sage said that if the prince is willing to condescend to see the palace, he will definitely receive the most grand welcome from the Japanese country, golden beauty, when the time comes. It will definitely make the prince enjoy endlessly~!"

"Damn~!"

Li Xiaogong patted the table, and said angrily, "A bitch from the country, An dare to use it to charm this king~?"

"Yes, yes~! You said something wrong, and ask the lord to atone for your sins~!"

Yoko Ono was very angry, but in fact he kept slapping himself in the face to beg Li Xiaogong's forgiveness.

"Hmph~! Since Queen Tuigu wants to see this king, then this king will go into the city! It just so happens that this king also has something to tell her."

Li Xiaogong hummed and said immediately.

Yoko Ono was overjoyed, but Li Xiao next to him was shocked, and quickly said: "Your Highness, it is absolutely impossible~! If there is an ambush in the Japanese King City, you will encounter any other accident, and your subordinates will die without mercy~!"

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