Li Chengqian looked at the sweat on Xiaohuangmen's forehead and murmured:

"This ghost weather is really hot. Put down the things and then put them in a copper basin and put them in water!"

"yes!"

The little yellow gate went to prepare.

Feng Xiaoyue, who was on the other hand, asked, "Your Highness, what are you going to do?"

"Make ice!"

Feng Xiaoyou was confused, making ice?

"Can this ice still be made? Didn't it survive in the ice cellar last year?"

Ancient ice cubes were rare and not everyone could have them. Generally, ice cubes were built in the winter of the previous year, and then ice was stored inside, and they would not be taken out until the summer of the next year.

This method can be said to be very labor-intensive, so ice and gold are expensive and not everyone can afford it.

Even Li Shimin could only use one piece of ice to relieve the hot temperature in a day, and it was impossible for him to obtain ice in the East Palace.

Some people also sell ice cubes, but they are extremely expensive.

In addition, the treasury has not been much money recently, and the monthly salary in the Eastern Palace is even less, so it is even more impossible to buy it with money.

Therefore, Li Chengqian thought of using his knowledge to make ice, at least he would have a better life.

I have been traveling through time, so I have to enjoy it. In the future, I will definitely be very happy to make some ice-related drinks and other things.

When it comes to the stone brought by Xiaohuangmen is saltpeter, he uses the principle of saltpeter to make ice.

"You can tell if you look!"

Li Chengqian ignored Feng Xiaoyou anymore. Because he couldn't explain clearly, it would be better not to explain.

"Your Highness the Prince is here!"

The little yellow gate brought a basin of water and said.

"Put down the water, Feng Xiao asks you to get a piece of saltpeter for me!"

Feng Xiaoyue had no choice but to do it and took a large piece of white stone from his bag.

It weighs at least twenty pounds.

"Your Highness the Crown Prince is very heavy! Let the villain come! What do you want to do?"

This weight is still heavier for Li Chengqian.

Because he is only nine years old now and is smaller than an ordinary child, his strength is naturally not as strong as others.

It’s no wonder Feng Xiao was worried about dating because he was sick when he was young.

"It's okay, take it over! Let me come!"

He had no choice but to hand the stone carefully to Li Chengqian.

"Be careful, sink!"

Li Chengqian took the stone, as if nothing was missing. You should know that he used to think it was heavy when he picked up ten kilograms of things, but now twenty kilograms are nothing to him.

And it was picked up with one hand.

Cheng Yaojin's body strengthening is indeed a good thing. Not only does it improve his physical fitness, but it also gives him strength.

Feng Xiaoyue, who was on the other hand, was confused because Li Chengqian's behavior refreshed his perception. Is this still the prince in his mind?

Li Chengqian ignored it and threw the saltpeter into the copper basin.

With a plop, saltpeter fell into the water.

Then a hissing sound came from the copper basin.

Then, a white mist rose from the basin, and there seemed to be some reaction here.

Scream

This scared Feng Xiaoyue and others. All unexplained phenomena in ancient times will be attributed to gods and ghosts.

His pupils gradually expanded, and his body became a little trembling. Obviously, this violent reaction scared him.

There are other small yellow gates who kneeled down on the ground and called for the gods to come to the world! Bless!

The ignorant ancient people could only explain this phenomenon as a god.

"Your Highness the Crown Prince is careful..."

The next moment, Feng Xiaoyue screamed, and at the same time ran towards Li Chengqian and protected him behind his body.

When he calmed down, something even more wonderful happened.

The water vapor disappeared, and the water in this basin instantly formed into ice, and a hint of coolness was emitted from it.

"Too... Your Highness the Prince... What's wrong with this? Why does the water have a hint of coolness?"

Feng Xiaoyue was a little incoherent, and everything in front of him had refreshed his cognition.

Li Chengqian disagreed. Isn’t it just the simple chemical knowledge of saltpeter dissolved in water to absorb a large amount of heat, lowering the water temperature and finally freezing, and then freezing. Are they so shocked?

But think about it, it is the Tang Dynasty and a backward feudal era, so how can I understand this principle?

It is understandable that they show shock.

Feng Xiaoyou was pretty good, and the others even knelt on the ground and kept kowtowing.

"All up, what's that? Isn't it just saltpeter ice? As for being so shocked?"

Li Chengqian was unhappy, and the little yellow sects felt that they had lost their rudeness and stood up. His face was still a little panicked.

Then Li Chengqian asked Feng Xiaoyou and said, "Feng Xiaoyou, go and try how the water in this basin is."

Feng Xiaoyue walked over tremblingly and reached out to touch it.

"This cold feeling is really ice..."

"That's right! It's ice, the ice I made."

"Your Highness the Crown Prince..."

However, Li Chengqian interrupted Feng Xiaoyue's words, and said more and less.

He said: "In the future, some saltpeter will be transported to my East Palace every day, and use this method to make ice for my East Palace to use."

"Yes! Your Highness the Crown Prince!"

Feng Xiaoyou said frankly, and then said, "Your Highness, if you exchange these ice cubes for money, then life in the Eastern Palace may be easier."

I have to say that Feng Xiaoyue is still very business-minded.

Since ice cubes are so expensive, why not develop them? Sell them for some money?

"You're right, I'm considering this."

So the question is, if you want to make it bigger, a little bit of saltpeter is not enough. It needs more saltpeter ore.

So Li Chengqian said again: "It's just that the demand for saltpeter is too great. Where did you saltpeter come from?"

"When you go back to the crown prince, you picked it up from the cave!"

“How many?”

“Not much!”

"If there isn't much, that may not work!"

Feng Xiaoyue said at this time: "Don't worry about this, Your Highness the Crown Prince. The villain knew that there was a saltpeter mine in the east of Chang'an City. Maybe it could be mentioned to the emperor to obtain the right to mine."

"Okay, okay! Okay, you Feng Xiao's appointment, you have made great contributions! I will talk to my father now!"

Li Chengqian was delighted. Why not be able to provide some good benefits for the East Palace? And he had many strange ideas in his mind.

"It is a villain's honor to be able to give advice to His Highness the Crown Prince!"

"Reward! Go to the warehouse to get a hanging of money as your reward!"

Although the East Palace doesn’t have much money, it can still be used. In the future, Li Chengqian will be a person who wants to make a lot of money. What is this little money?

Li Chengqian cannot be stingy with such a loyal person.

"Thank you, Prince!"
Chapter completed!