Aunt Cheng stood at the window and looked at Qi Yu in the courtyard, with a smile on her face.

Young man, it's that simple. If you say you're happy, you'll be happy, and if you say you're sad, you'll be sad, for a while.

It's good to be young! Aunt Cheng seemed to have a picture in front of her.

Qi Yu played a tune for an hour, and as soon as he looked up, he saw that Yan Deshan walked to Lanfang Pavilion with a basket on his shoulder.

Qi Yu got up and was about to walk in front of Yan Deshan, but he ...... Before he could take a step, he was stopped by Ge Jin.

"Gege, you just played the piano, and you haven't put medicine on your hands yet."

"yes, then let's apply the medicine first!"

Qi Yu sat in his original seat.

Stretch out your arm and put your wrist on Gekin's thigh.

Ge Jin buckled a piece of ointment and smeared it on Qi Yu's hand.

Gege has a heart to go, so they have to be cautious, but ...... Fortunately, Gege is a little more out of self-maintenance, and when he encounters something, he can hide faster than anyone else.

Don't worry too much.

After the ointment on his hand was absorbed, Qi Yu ran out of the pavilion.

This time, no one stopped him.

Qi Yu walked up to Yan Deshan's side, squatted down and glanced at the white crystals in the basket.

He turned around and instructed Ge Jin: "Bring a basin of water." ”

"No."

Ge Jin responded in a similar way, got up and walked to the flower hall, and walked out with a copper basin.

There is also half a basin of water in the basin.

Qi Yu poured the saltpeter powder from the basket into the basin of water. "Alright, put this pot under the tree."

The saltpeter has to react with the water for a while, so it is not in a hurry, so it is cool under the tree and easy to observe.

Ge Jin thoughtfully prepared a small stool for Qi Yu. Qi Yu worked on the stool for nearly half an hour, and the water in the basin turned into ice cubes.

"How to ......"

Qi Yu looked back at Ge Jin.

Ge Jin - already dumbfounded.

Gege will be immortal? It's hard to be a god.

No wonder it's so charitable on weekdays.

Unable to hear Ge Jin's voice, Qi Yu felt a little unhappy in his heart, and when he looked back, he found that he ...... There seemed to be a light in Ge Jin's eyes.

This is, what did I think of again, I always felt the back of my neck cold.

"What are you looking at?" Qi Yu asked.

Ge Jin said adoringly: "Gege, are you an immortal method?" ”

"If you have nothing to do, you can read more, saltpeter into ice was written in the Tang Dynasty, but there are not many saltpeter, and it is limited, and if you want to use saltpeter to make ice on a large scale, you have to mine deposits."

"Reading ......"

Ge Jin was a little embarrassed. If it's just about reading, she doesn't care.

But can reading a book turn stones and water into ice?

"Saltpeter is not a fairy method, as long as there is saltpeter and water, anyone can make ice."

"......" Ge Jin understood what Qi Yu meant, lowered his head and blushed, did Gege dislike her for being so stupid.

It must be disgusted.

"Gege, will we use up the ice in the future, and this ice cube can be used to make ice cheese?"

"Yes." Qi Yu nodded.

In the travelogue script, in the Tang and Song dynasties, some people used ice made of saltpeter to make some shaved ice to eat.

Later Yuan's entry into the Central Plains led to a fault in many things.

The method of using saltpeter to make ice is lonely.

In the affairs of the Ming Dynasty, the Donglin Party of the court controlled the government of the court, and the literati borrowed Confucianism to enslave the people, plus the system at that time.

Very few people know about saltpeter.

So now, the ice used is hidden in the cellar in winter, and the cellar is some distance from the surface, and the ice is often put in the cellar in winter.

Even in summer, the sun's scorching temperature does not reach the ground.

It wasn't until the day the ice was sold that the ice cellar was opened, and families lined up to buy ice slips.

Even the ice used in the Fourth Master's Mansion was bought from outside.

The amount of ice consumed for cooling off in the summer every year is not a small amount.

Of course...... Qi Yu doesn't care about this now.

To make ice, Qi Yu was not stingy, and asked Yan Deshan to send a large piece of ice to a few little maids and little eunuchs in Lanfang Pavilion.

Even if you divide it evenly, this bit of ice is not enough to cool off.

But you can make your own fruit shaved ice from ice cubes!

Chop the ice cubes with a knife, put some sugar and fruits, peanuts and melon seeds, and eat them with a spoon, which is considered a cool summer in the summer.

Of course......

Ice made from saltpeter powder is not much to eat.

Qi Yu's side naturally couldn't hide it from Fu Jin's eyes.

Hear Mama Kim's words.

It's hard for Fujin to calm down, and you can make ice out of saltpeter?

"Chun Tao, go get some saltpeter."

"The slave understands." Spring, as the right-hand man of Fujin, naturally knows what this method has to do with it.

He turned around and left the main courtyard.

What about Fujin......

Glancing at Mama Jin, she said, "Mama, shouldn't I also read more, if I read more books earlier, I might be able to save a lot of money." ”

"Fu Jin, you take it for granted, this also depends on luck, Shu Muluge has read a few books, but they are all travelogues, and some of them are not circulated outside, you see that many elder brothers in Changchun Garden get up early every day to study, don't you find a way to make ice? Time is also fate, maybe Shu Mulu is your Zhuge . ”

Fu Jin chuckled softly.

If Shu Mulu is Zhuge , can she still be Liu Bei......

"Don't say this in the future, if outsiders know about it, they still think that I plan to follow the example of Emperor Wu back then."

"The old slave naturally won't say it outside, he has lived for half his life, how can he not know that trouble comes out of his mouth."

"Mama Jin has suffered you all these years."

"The old slave doesn't feel bitter, Fu Jin, the old slave thinks that Shu Mulu's luck is excellent, you might as well make friends with her, you are worried about the consumption in the house these days, Shu Mulu Gege will make ice, maybe it is the will of God."

Fu Jin thought carefully for a while and nodded.

Shumulugege's luck is indeed good.

Her Honghui got better because of the doctor invited by Shumulugege.

Right now......

She also zigzags took advantage of Shumulugege.

I talked to Mama Jin for a while.

Chun Tao walked in from outside.

Chun Tao has a basket hanging from her arm.

The basket was filled with saltpeter.

Fu Jin glanced at it, and Mama Jin immediately cut off a basin of water and poured the saltpeter powder from the basket into the basin.

A few people sat by the basin and waited.

After a while.

Chun Tao's surprised voice came out: "Ice, it's ice." ”

Fu Jin raised his eyes, but no, it really became ice.

"Mama Jin, you go to the treasury and send the two ice blue cloud brocades from the Long Live Lord to Lanfang Pavilion."

"The old slave understands."

Mama Jin walked out with a smile.

Niu Xilai followed behind Mama Jin, and Niu Xilai was indispensable to go to Lanfang Pavilion to do errands.

Ice blue cloud brocade has a cool feeling when it is touched.

It is the most comfortable to wear in summer, and it is said that it is made of ice silkworms spinning silk, and the annual output is very small.