The two rarely chatted without competition, sitting in the private room on the first floor, pushing the window to see the bustle of people coming and going downstairs.

The heavy rain has stopped for a long time, and although the ground is still a little wet, it is better than the heavy rain and splashing water a few days ago.

When the windows are opened, you can still hear the sound of the street downstairs.

The summer sun slanted in from the window, sprinkling a large amount of light, as if Yun Jinchu had thought about the heavy rain breaking the embankment before, she walked towards the window, facing the particularly dazzling sunlight in midsummer, feeling hot on her body, but it did not prevent her from being in a good mood.

At this time, if there is a bowl of shaved ice or milk tea iced coffee, it is simply a human enjoyment.

Yun Jinchu remembered what he had told Luo Jingzhou and them before, turned his head to Mo Xuanchen and said, "Oh yes, can you find saltpeter?" ”

"Saltpeter?" Mo Xuanchen pondered for a moment, "Are you talking about raw nitrate?" ”

Yun Jinchu nodded: "Yes." ”

She remembered the name.

Saltpeter is also known as flame nitrate, raw nitrate, there are fire nitrate, miscanthus nitrate, and the fire nitrate can be used to make ice.

Mo Xuanchen said: "This thing can be used in medicine, Xiahou Yu should have it." He paused, "What do you want this for?" ”

"Ice-making."

Yun Jinchu didn't hide it from Mo Xuanchen, after all, ice making is a big deal, and the interests involved in it are not the slightest bit, neither she nor the first floor can bear it, and she has to pull the tiger skin of Zhennan Wangfu and Mo Xuanchen to cover it up.

The most important thing is that saltpeter is too useful, and she may still need it when she makes other things in the future.

She is a newcomer, and she doesn't have much team and power, so if she wants some saltpeter to make ice, she can still buy it from a pharmacy, but if she wants to do something else, she has to come forward with Mo Xuanchen when she turns back.

Instead of hiding himself and running around to cause trouble, it is better to simply find him to save trouble, and it is a big deal to share some of his benefits in return.

Mo Xuanchen looked surprised: "Saltpeter can make ice?" ”

Yun Jinchu nodded: "Didn't I say it, my father has traveled south and north to get some ancient books, and there is a record in them that ice stones can be obtained by entering water with fire and nitrate." ”

"Ancient books?"

"There are a lot of lost crafts and some messes on it."

Yun Jin Chu went from pushing off the wine-making recipe to getting it from ancient books, and it became extremely easy to find the source of those things she would know, and she would take out a lot of things that did not belong to this era in the future.

The wisdom of the ancestors, the lost things, it's not surprising that she just reappeared, right?

As for where the ancient books came from and where they went, the Yun family has already dispersed, who can know?

As for whether it will be debunked after finding Yun Yang back......

Yun Jinchu didn't think about it so much, Yun Yang didn't know if he was alive or not at the moment, even if he was really alive, when she brought people back, she and Mo Xuanchen would have already broken up, could it be that Mo Xuanchen could still go to the bottom of it and ask him if he could?

Mo Xuanchen saw that Yun Jinchu was fooling him very perfunctory, and felt funny in his heart, but he didn't expose her, but just said: "Most of this saltpeter is just some medicine shops on weekdays, if you want, let Xiahou Yu give you some, if you can really make ice, I will find a way to find it for you, it's just ......"

"I know, four or six points, like a drink."

Mo Xuanchen: "......"

He originally wanted to say that it would just take some time, but it can be seen that Yun Jinchu has a posture that I understand, and he also took the initiative to divide the benefits, and he was silent for a moment before gladly accepting it.

Anyway, his turn back is also his daughter-in-law's, his left hand is down to his right hand, it doesn't matter who has more or less.

Yun Jinchu is quite wary of him now, because the sins he created before always felt that he would calculate what she was, if he didn't want to take the initiative to help anything, this little ancestor was afraid that he could just pat his ass and turn around and run, and asking for some benefits would make her feel at ease.

explained the list of the Luo family to Sun Yilan, went to the wine-making place and wine cellar to check the wine, and set the opening date, Yun Jinchu asked Sun Yilan to leave a few jars of the best wine cellar alone, and planned to send them back to the palace to be handed over to Concubine Xiao Guifei, who had helped her today.

Mo Xuanchen has been following behind Yun Jinchu, watching her negotiate with people from a distance, teaching people to make wine, her whole body is full of confidence and brilliance that belongs to her, and her eyes are full of tenderness that she is not aware of.

By the time the two of them returned home, the sun had already set in the west.

The sun was setting all over the sky, and the orange-red glow shrouded the entire Zhennan Palace.

Xiahou Yu heard that Yun Jinchu wanted saltpeter, so he quickly took it.

Yun Jinchu asked Yan Hui to take two pots, one large and one small, the big pot was a wooden basin, and the small one was a copper basin with better temperature conductivity, and the two basins were stacked, and the wooden basin was wrapped in a cotton quilt for heat preservation, and Xiahou Yu was asked to pour clean water into the two basins, and the water line in the wooden basin covered the copper basin.

"And then?" Xiahou Yu asked.

Yun Jinchu pointed to the wooden basin: "Saltpeter poured in." ”

"All?"

"All."

Xiahou Yu glanced at Mo Xuanchen and saw that he was only standing quietly beside him, so he didn't think much about it, and just poured all the saltpeter into the wooden basin according to Yun Jinchu's instructions.

The saltpeter entered the water to cover a layer of the basin, and Yun Jinchu took something to melt it into the water.

After a large amount of saltpeter was poured into the wooden basin, the water did not change to the naked eye, but Yun Jinchu reached out and touched the edge of the copper basin, but she could clearly feel that the water temperature had begun to drop, and the edge of the basin had also cooled down.

Seeing Yun Jinchu clapping his hands, Mo Xuanchen asked, "That's it?" ”

Yun Jinchu nodded: "Put this wooden basin in a shady and dark place, and it should be almost there tomorrow morning." ”

Mulberry leaves and wild goose back carried out with a tightly wrapped wooden basin.

Xiahou Yu was curious: "This saltpeter only knew that it could be used in medicine in the past, what is the reason for making ice?" ”

Yun Jinchu explained: "Saltpeter absorbs heat, dissolved in water will absorb the temperature in the water, and the water temperature will decrease rapidly, just like the cold lake water freezes in winter, and the water in the basin drops in temperature because of saltpeter, and the water temperature can condense into ice when the water temperature is low to a certain extent." ”

Xiahou Yu was thoughtful.

Yun Jinchu continued: "The ice condensed from the saltpeter water in the wooden basin is inedible, but it can be used to cool off, and the water in the basin that has never touched saltpeter can be eaten. ”

Although it was the first time Mo Xuanchen had heard of the method of making ice from saltpeter, it could be seen that Yun Jinchu had no doubts about whether he could succeed.

He just remembered the amount of saltpeter just now, frowned lightly and said: "This method is indeed rare, I have never heard of it in the past, if it can really make ice, the benefit is not small, but the amount of saltpeter is not a small amount." ”