I really don't want to be a rebel [infrastructure]

Luo Shixing immediately asked Wei Siwen to put down the sack, and opened it to have a look. After seeing the glassy gray crystal inside, he almost got into the sack to identify it carefully.

Of course, Wei Siwen wouldn't fool them in this regard, so it's really saltpeter!

He patted Cheng Jingwei in excitement, "Hurry up, hurry up, let's dig a cellar."

Cheng Jingwei was caught off guard and was almost slapped on the ground by him, with a puzzled look on his face: "What?"

Luo Shixing looked very excited and said, "We will have an ice cellar."

Cheng Jingwei and Wei Siwen looked at each other, with some kind of doubt in their eyes: Is this kid thinking about the ice cellar and being stupid?

Cheng Jingwei even reached out and touched Luo Shixing's forehead, and after confirming that he had no fever, he coughed lightly and said, "Lynx cat, it doesn't freeze in winter here, so we can't afford an ice cellar."

Luo Shixing raised his head and snorted: "Of course I have a solution, you don't understand the world of science!"

He was already happy to let Mao Mao take off, and he didn't care about paying attention to the way he spoke. If he exposed it, he would expose it, because they couldn't understand it anyway.

As a northerner, it's not that I don't worry about how to live in this hot place in summer. At present, I don't have this worry, but food preservation is also very troublesome.

Without salt, pickling is a problem.

But don't worry now, he has a way!

In fact, Cheng Jingwei and Wei Siwen did not understand the world of science, but both of them were not so thirsty for knowledge, and they were more concerned about Luo Shixing's desire to build an ice cellar.

Cheng Jingwei's eyes lit up when he saw him, even though he knew it was unreliable to turn the cellar into an ice cellar, he still hesitated to persuade Luo Shixing.

What he was thinking about was a child, he needs education if he is ignorant, and he can't do whatever he wants. Exile did make Luo Shixing mature a lot, but it wouldn't make him a calm adult overnight. Someone needs to guide him.

But what he said was: "Then where do you want to get it?"

There is no way, although Luo Shixing is rarely unhappy, he can see his smiling face every day, and there are too few things that make him happy, and Cheng Jingwei is not willing to let him down.

Wei Siwen originally planned to hand over the persuasion to Cheng Jingwei. He is old, and looking at Luo Shixing is like looking at his own grandson. In addition, the child invited him to a delicious barbecue yesterday, as "no help." He is too busy to be too late" adult, he is embarrassed that he has no position to educate the other party, he is much better than him in life, and he doesn't need any guidance from him.

However, after Cheng Jingwei said these words, he was stunned, and couldn't help turning his head to look at Cheng Jingwei, wanting to tell him that it is not good to pamper children like this!

Children can't be spoiled too much, it's easy to spoil their temper!

However, he soon realized that Cheng Jingwei didn't seem to be very old, but the other party looked more silent and calm, so that Wei Siwen would always ignore his age.

So this is actually two brats throwing their temper, and they can do whatever they want as soon as they slap their heads?

Wei Siwen hesitated for a moment and decided not to speak. He felt that his common sense didn't seem to be of much use in this place. He said that wild boars should not be eaten before, but then Luo Shixing made a barbecue for him, and he still ate it until now. .

Now he said that the ice cellar is impossible... What if someone really made an ice cellar?Being slapped in the face so frequently, there is really no place for his old face!

Luo Shixing smiled and poked Cheng Jingwei with his head: "Just choose a place, I'm not very good at planning yards."

Cheng Jingwei looked around and said, "It's on the northwest corner. After all, we're digging the ground. It's not good to be too close to the house."

The most important thing is that if the two of them can't leave in a short time, Cheng Jingwei plans to add another room, even though he and Luo Shixing are boys and don't need to sleep in separate rooms, but their things can't be piled up in the room or in the yard.

They will have more and more things in the future, especially the stored food will emit odors. Several kinds of them are mixed together, and the smell in the house is absolutely amazing.

So he needs to plan the location of another house, where nothing will be placed.

Luo Shixing nodded frantically, and then asked, "How long will it take to dig?"

Although he is very excited now, his rationality tells him that this is not a small project, so Luo Shixing is a little anxious. If it is too slow, the pork will not be able to carry it.

Wei Siwen felt that he had more say in this aspect. The ice cellar is not something that you dig out and there is ice in it.

Especially in relatively hot places, the ice cellar must have a sufficient scale, and there must be enough ice in it to maintain the temperature. Otherwise, if the temperature is too high and there is not enough ice, it will melt.

So this plan is really unreliable, not to mention that they don't have ice now, even if they have ice, there is a high probability that it will not be enough to make an ice cellar.

In the end, before he could speak, Cheng Jingwei said with confidence: "It's not very hot now, we can get a smaller one to keep the ice in the ice cellar from melting, and if we have time, we can make it before the summer heat Just expand the ice cellar a little bit."

Luo Shixing happily patted Cheng Jingwei's shoulder: "Ah Wei, you are so smart!"

Cheng Jing sighed slightly and asked, "So, can you tell me how you make ice?"

Luo Shixing pointed to the saltpeter and said, "Let me tell you, saltpeter is something that can absorb the temperature in the water, and then freeze the water into ice."

Cheng Jingwei asked: "Aren't these enough?"

Because he just wanted them to tan the pigskin, Wei Siwen didn't bring too much.

When Wei Siwen heard this, he wanted to continue persuading them, telling them that saltpeter is not easy to get in this place, or that they don't have anything that can be exchanged for saltpeter.

It's better to keep the pork in exchange for things they need more, and let's put the luxury of the ice cellar aside.

In fact, even in the less hot places in the north, ordinary people do not have ice cellars, so ice becomes a very luxurious thing in summer.

But when Luo Shixing looked over and thought seriously, his words turned into: "If it's not enough, I'll find a way."

After he finished speaking, he was silent for a while, hey, really, he was not so exaggerated when he doted on his little grandson back then.

Luo Shixing said uncertainly, "Try it first."

He didn't know how much ice could be produced from these saltpeters. In addition to the ratio, the purity of the minerals was also needed to make ice from saltpeter.

Luo Shixing couldn't tell the purity of saltpeter with the naked eye, nor could he know the ratio by hand, so he still had to try.

But he needs a more suitable container before trying.

Fortunately, Cheng Jingwei had fired a lot of pottery before, and one of the pottery was so thin that the top of the bottle was broken when it was fired.

They had no shortage of pottery, so the mutilated bottle, which had been put aside for the time being, came in handy now, as it was the thinnest of all the containers they had.

The thinner the container the faster the saltpeter absorbs heat.

Luo Shixing directly got a bamboo bucket, put water in it, and then filled the bottle with water and put it in.

After putting everything in place, he began to add saltpeter to it little by little.

While adding it, he said regretfully: "It's a pity, it would be great if this was a transparent bottle, so that you can see the process of freezing bit by bit."

After hearing this, Wei Siwen smiled and said, "Even if it's made of crystal, it's too extravagant."

Luo Shixing paused, and only then remembered that glass was still called colored glaze at this time, and it was still a very valuable thing, especially transparent colored glaze. Because the raw materials for firing colored glaze in Zhongyuan were not good enough, transparent colored glaze could not be fired.

Moreover, the firing of colored glaze requires a lot of resources, and few people know how to fire it. This makes those colored glazes almost exclusively for the royal family and nobles, and ordinary people...even merchants and wealthy households may not be able to afford it.

He didn't say anything else, unless he was given the raw materials and the resources he needed, he wouldn't be able to make Liuli even if he was asked to do so.

Making ice with saltpeter is actually a relatively slow process. After squatting there for a while, Cheng Jingwei and Wei Siwen didn't see any tricks, so they simply went to do something else.

Cheng Jingwei originally planned to repair the fence today, but seeing Luo Shixing's appearance, he thought about it and started planning the location of the cellar, and positioned the ice cellar door by the way.

Luo Shixing actually wanted to do something else, but before he knew the ratio, he needed to observe a little bit, and then add saltpeter to it or reduce the water in the bottle.

If the ratio is wrong, the water in the bottle will not freeze.

After about a quarter of an hour, Luo Shixing felt the temperature on the surface of the bottle getting lower and lower, and even when water droplets began to faintly appear on it, he knew it was almost done.

He waited patiently for a while, then lifted the bottle and shook it lightly, and then heard a crisp crashing sound inside, obviously it had started to freeze.

Luo Shixing was overjoyed, and continued to wait patiently until the bottle was shaken and there was no more collision sound before saying cheerfully, "It's ready!"

Cheng Jingwei, who was digging a hole on the side, and Wei Siwen, who helped Cheng Jingwei to transport the soil, hurried over to watch while patting the soil off his body.

Luo Shixing jumped happily holding the bottle and said, "Touch it, touch it quickly!"

Because the bottle is in the shape of a thin mouth and a big belly, you can’t see it. You can only feel that there is ice in it from the temperature.

Cheng Jingwei and Wei Siwen didn't understand at first, after hearing what he said, they subconsciously raised their hands and patted his head together.

Luo Shixing hurriedly held down his tiger hat that was about to be rubbed off and stared wide-eyed: "Where are you touching? I'll let you touch the bottle!"