Ying Tianfu Hope School.

This section was originally Zhu Yunxi's public class, but Zhu Yunxi didn't say anything, just put a delicate and small kettle on the lectern.

Zhu Yunxi lit the small stove in front of dozens of students, put the teapot on it, and then retreated to the side and waited.

It wasn't until the water in the teapot boiled and the steaming teapot lid "snapped" that he slowly spoke.

"That's the main thing for today."

"What did you see inspired by this kettle?"

The students in the audience stared at each other when they heard this, and secretly said in their hearts what inspiration could this have, isn't this just a kettle for boiling water?

Liu Haohong is the most proficient person, and when he heard Zhu Yunxi's words, he immediately realized that the three emperors and grandsons were inspecting everyone's eyesight!

So, he sneaked outside and went to the office to get a bag of tea leaves, plus a few teacups.

"Teacher, this is the inspiration of the students, do you think it right?"

Seeing this, Zhu Yunxi reprimanded angrily.

"Get out!"

"Go back to your seat and keep watching, I can't see what I'm going to talk about today, so you can sit here all the time!"

Gao Ming, Qin Hengbo, and Yang Xinlu also sat under the stage with frowns, watching the water vapor in the kettle pop out, and the teapot lid crackled, thinking about the intention of the three emperors.

Among them, Gao Ming and Yang Xinlu are not interested in physics, but they just follow the curiosity to learn.

Therefore, after looking at it for a while, the two suddenly lost interest and began to close their eyes and recuperate.

Only Qin Hengbo took it the most seriously, and subconsciously felt that Zhu Yunxi should be teaching some amazing immortal method.

But he is biased seriously, he has a perfect score in chemistry, and physics is only at the level of half-hanging.

After another moment, Mabo tentatively raised his hand.

"Teacher, the student took the liberty of guessing, I don't know if the guess is right or not......"

Zhu Yunxi was almost impatient, and hurriedly said when he heard this.

"Say!"

"Teacher, do you want to say that this water vapor is also the same as the flow of water, and it is also a force that can be controlled by us?"

Zhu Yunxi was so excited when he heard this that he jumped up on the spot, grabbed Ma Bo's arm, and patted him on the shoulder.

"It is worthy of being the representative of the physics class for the teacher, and this comprehension ability is strong!"

"You're right, that's what you mean by being a teacher!"

"Hydraulic workshops are inevitably affected by the flow of water, and the difference between the flow of water during the dry season and the wet season is too great, even with the help of a dam, it is impossible to continue to provide stable power."

"But water vapour is different, as long as we have enough charcoal, we can use this force at any time and anywhere to bring everything in the workshop to work."

"And this force can also act on other means of transportation, such as sea vessels, such as land vehicles......"

In fact, Zhu Yunxi could tell them the answer directly from the beginning, but in that case, they would lose the ability to think, and they would only become a voice worm.

Zhu Yunxi has high expectations for these people, but he expects these people to liberate the productive forces for him, realize the industrial revolution in the Ming Dynasty, and realize the four modernizations.

Therefore, I pay special attention to their cultivation, even if I can't get out of bed by Lao Zhu, I am worried that no one will check the homework of these students......

Zhu Yunxi used the kettle as a prop to explain to them the principle of the steam engine for a few days.

Then, take out a drawing of a steam engine and ask them to compare it.

Although the weapons workshop has been returned to the imperial court, Zhu Yunxi has already copied a set of smaller workshops in the north of the city, which is used to make civilian utensils and sell them for money, and at the same time to build various parts of the steam engine for experiments.

On this day, as soon as he finished his morning class, he saw Zhu Li, the king of Jin, standing at the door, looking at him with a smile on his face.

In fact, Zhu Li has been here for a while. It's just that seeing that the eldest nephew is so serious about cultivating his henchmen, he has been waiting quietly outside the door.

When Zhu Yunxi saw Zhu Li, he hurriedly greeted him warmly.

"Third uncle, you haven't eaten at noon, you might as well eat in our school."

"Okay!"

Zhu Li agreed with a smile, and then asked meaningfully.

"Your imperial grandfather knows about your cultivation of disciples, right?"

"What doorman?"

didn't wait for Zhu Yunxi to answer, Gao Ming answered for him.

"His Royal Highness the King of Jin is cautious!"

"The Three Emperors and Grandchildren only have the three of us old guys as guests, and these are just gentlemen from the Hope Academy."

Hearing this, Zhu Li hurriedly agreed.

"Yes, yes!"

"Mr. Gao is right, it's this king who said the wrong thing!"

Zhu Li admitted his mistake on the lips, but he was really happy in his heart, feeling that his eldest nephew had come out and was already consciously cultivating the team.

Because of this misunderstanding, Zhu Li looked at his eldest nephew more and more pleasing to the eye, not only stayed in the school for lunch, but also accompanied by Zhu Yunxi after lunch, the good student walked around the school.

It's just that before leaving, he ordered someone to bring over a box and opened it in front of Zhu Yunxi, revealing a black broken stone.

"Big nephew, the third uncle is going to go on a long trip tomorrow, and he may not be able to come back in a month or two."

"This is a birthday gift that the third uncle specially found for your imperial grandfather, since I can't come back, I will give you this stone, and you will give it to your imperial grandfather as filial piety!"

Zhu Yunxi looked at the box curiously when he heard this, and saw that it was just a black and swarthy broken stone, and he immediately lost interest.

"Third uncle, the emperor's grandfather finally passed his second birthday, and I will send a stone, isn't it a little too perfunctory?"

"Besides, I have already prepared a birthday gift for the imperial grandfather, which is ten thousand times better than you!"

Zhu Li was not happy on the spot when he heard this, he spent a lot of money to buy a divine stone, but it turned out to be a broken stone in the mouth of this grandson.

"You kid doesn't know the goods!"

"I'm a divine stone, I have absorbed enough sunlight during the day, and at night I can see the word Hongwu on the stone!"

"Hah!"

If Zhu Li didn't explain, Zhu Yunxi would only think that this thing was a meteorite. But after listening to his stupid third uncle's explanation, there was only one thought in his mind, that is, the stupid third uncle was deceived.

"Third uncle, how much did you spend on this thing?"

Zhu Li stretched out three fingers with a painful face, and Zhu Yunxi subconsciously guessed.

"Three hundred taels?"

"It's too dark, isn't it?"

When Zhu Li heard Zhu Yunxi's words, he raised his leg and kicked him out.

"Three hundred?"

"If you give three hundred, you won't even have the qualifications to take a look!"

"To tell you the truth, the third uncle spent a full 30,000 taels of silver to buy this divine stone!"

"If you send this thing up, your imperial grandfather will be happy. Maybe when I'm excited, I'll just seal you for that......"

"Prince?"

"Actually, the king of the county is also very good, as long as the territory is big, it doesn't matter what the king is......"

Zhu Yunxi echoed a sentence, and then became angry.

"Third uncle, you have been deceived!"

"Don't say 30,000 taels of this kind of broken stone, if you give me 30 taels, I can make several pieces for you!"

When Zhu Yunxi said this, he suddenly realized a problem.

If this kind of thing is so valuable, why not make some of it yourself?

Isn't it just a stone that can emit light, or it's not self-luminous, but a fluorite that can only shine when it is irradiated by a light source.

As long as you learn mathematics, physics and chemistry well, no matter what kind of divine stone you are, what divine wood, white deer, or divine turtle, we can imitate it!

When Zhu Li saw his eldest nephew say this, he was furious on the spot, pointing at Zhu Yunxi and scolding.

"Little rabbit cub, if you can create such a divine object with thirty taels of silver, I will call you uncle!"

Zhu Yunxi saw that Zhu Li was angry, and hurriedly laughed and went to coax his stupid third uncle.

"Third uncle, don't be angry, you are really a god, 30,000 taels of silver is too cheap!"

"My eldest nephew just said a big thing to you. But such a sacred object, you should keep yourself and dedicate it to the imperial grandfather, I have a better birthday gift, so I don't need this. ”

When Zhu Li heard Zhu Yunxi say this, he thought that this kid really realized his goodness

Painstakingly.

As everyone knows, his move can make his father miserable, so that his father received a bunch of imitation "divine objects" when he passed his birthday.

"Oh?"

"Where is the birthday gift you prepared, can you let the third uncle take a look at it for you first, but there are any taboos."

Lao Zhu is very trusting, and there are a lot of taboo things. Gao Ming's brother Gao Qi was executed because Gao Qi committed his taboo when he wrote poems.

As Zhu Yuanzhang's son, Zhu Li knows his father's temper best, for fear that his eldest nephew will not think about it, and then because of some taboos, the old man will be unhappy.

Zhu Yunxi didn't think about it when he heard this, and immediately happily took Zhu Li to the clock-making workshop, pointed to a one-person tall floor-to-ceiling bell and said.

"Third uncle, this is the birthday gift I prepared for the imperial grandfather!"

It was the first time Zhu Li had seen such a strange thing, and he saw a huge square box divided into two parts, the upper part had a disc, and there were three pointers on the disk, but for some reason only one pointer was rotating, and the other two were motionless as if they were broken.

The lower part is a pendulum that makes a click, click, clatter sound as it swings.

"This thing is ......"

"Uncle Hui, this thing is called the self-striking bell, and it is a birthday gift specially created by me for the emperor's grandfather!"

"This thing will make a bell sound every half an hour to tell the time, but now the error is still a bit big, and it will be about half an hour a day!"

Zhu Li heard Zhu Yunxi say so magically, he became interested, circled around the chiming bell a few times, and asked the craftsman on the side to show him how to tell the time, how to display the time, and so on.

After studying and understanding the operating principle of this thing, Zhu Li expressed his heartfelt admiration.

"This thing is indeed the work of heaven and earth, and it is very delicate and elegant."

"If you present this thing, your imperial grandfather will definitely be very happy!"

"Since you have a better one, then the third uncle will not be polite to you, so he will bring the Divine Stone back!"

Zhu Li walked out as he spoke, but as soon as he walked to the door, he suddenly realized a problem, that is, the name of this thing seemed to be a little wrong.

"Big nephew, what did you just say this thing was called?"

"Ringing the bell!"

"Striking bells?"