Rebirth before the doomsday: I quietly emptied the city of supplies

Chen Yu filters every pot of soil twice to prevent the saltpeter component from being filtered out completely.

The dirt in the pot was constantly scooped out, and then the fine dirt in the pot was filtered out with a filter cloth, slowly evaporating the excess water over the fire. When it was almost done, Chen Yu took the iron pot off the fire and let the water temperature slowly drop.

When the water temperature reaches about 20 degrees, some snow-white crystals begin to condense in the pot. As the temperature continues to drop, more and more crystals condense.

These are pure saltpeter. After the saltpeter in the pot had stopped condensing, Chen Yu slowly poured out the water at an angle.

The water had been poured out, and Chen Yu shoveled out the saltpeter from the bottom of the pot with a shovel, put it next to the fire and slowly roasted it over a low fire to dry the saltpeter for easy loading. This process lasted for a whole morning, and it was barely possible to purify and filter out all the saltpeter. As for the remaining charcoal powder, it was even simpler. The firewood he used to filter the saltpeter in the morning had all been burned into charcoal.

All you need to do is pick out the charcoal that has not been completely burned, grind it into powder with a stone, and then find a jar to put it in!

It was not until Chen Yu completely refined the saltpeter and began to grind charcoal powder that the poor students in the live broadcast room realized that Chen Yu really wanted to make explosives.

"I told you, Chen Yu wants to make explosives, and it turned out to be true!"

"The one who said Chen Yu used sulfur to treat diseases, come out here. I promise not to kill you! Come out!" "You're so polite. Why does he make explosives? His power is so strong, why does he need explosives?"

"Idiot, can't he just make some fireworks? It's almost Chinese New Year, make some to celebrate!" "They are all big guys, I admire them!"

……

The audience in the live broadcast room had their own guesses, but how could they guess Chen Yu’s decision?

Now that the materials are ready, you just need to fill them into a sealed container according to the proportion and order, add the ignition fuse and you can use it...

Chen Yu hasn't found a suitable sealed container yet. Most of the firecrackers people use during the Chinese New Year are made of cardboard.

Therefore, gunpowder could be made into explosives by wrapping it in layers of paper, but it was too late to make paper now, and the amount of paper they usually used was not much, and it was not enough.

It seems that he has to find another way to make a sealed container. Chen Yu thought about it and suddenly found that ceramics is a good substitute, and it doesn't take much effort to make it.

Thinking of this, Chen Yu said hello to Ling Qing, then took the big bag of materials and ran towards the depths of Yuyu like the wind.

When the drone saw Chen Yu suddenly running towards it, it quickly took off and chased after him, but Chen Yu's explosive power was too strong and he disappeared in the crowd in an instant.

Drones are not suitable for flying alone in the rain, so one of the two drones was filming on Ling Qing's side, and the other flew to the top of the tree, searching for Chen Yu's trace in this vast rain.

But this piece of rainy sky is almost a primitive jungle. Not to mention that Chen Yu is alone in it, even if an elephant comes and is in it, it cannot be seen from the sky.

The drone was helpless. After searching in the clouds for a while without any results, it was led back to the nearest supply point by the signal. Chen Yu took the formula of gunpowder and ran to the location where the wolf pack was gathered, bringing the wolf king Erha with him.

Then the man and the wolf spent half an hour to quickly arrive at Cuihuju and found Fengying who was taking a lunch break, because he was going to conduct a blasting experiment here. In order to ensure that Erha and Fengying would not be scared when using explosives to deal with the black python, Chen Yu brought them with him so that they could be mentally prepared in advance. At the same time, it was also necessary to conduct experiments in order to accurately obtain the data of the blasting force, estimate the amount of gunpowder, and ensure their own safety. Chen Yu first used a bamboo tube as a container for the first explosion experiment.

Following the order of making explosives, Chen Yu mixed charcoal powder, saltpeter and sulfur in proportion, and then filled them into the bamboo tube in that order. Finally, he used dry cotton thread as a fuse at the opening of the bamboo tube.

Chen Yu extended the fuse by several meters and lit it with a bamboo pole while standing at a distance.

"boom!"

There was a loud bang, and a deep pit was blown out of the sand on the ground. Although it was not big, the effect was quite good... However, what worried Chen Yu was whether this new homemade weapon could work in the swamp.

You know, the viscosity and strength of swamps are much stronger than ordinary sandy soil. Now this bamboo tube can blow a hole in the ground, but it may not be the case in a swamp.

Since he wanted to test the power of gunpowder a few more times, Chen Yu not only used bamboo tubes, but also experimented by piecing together various wooden boards, but the effect was not as good as with the bamboo tubes.

To make this gunpowder, the first thing is to adjust the proportion, then compress the materials, and finally seal them tightly. Chen Yu thought about it and felt that it would be better to use a pottery jar as a carrier. Not only is it highly sealed, but it can also hold a large amount of gunpowder, and the power will definitely be more powerful!

Soon, Chen Yu directly ignited the earth kiln, using the high temperature of the earth kiln to burn the strongest carrier. Because it takes a certain amount of time for the earth kiln to heat up, Chen Yu took this time to go to the swamp to take a look. After all, he hadn't paid attention to She Er's situation for two days, and didn't know how it was now.

More importantly, the weather is too cold now. Although She Er is immune to hibernation, a snake's instinct, to a certain extent, as the weather gets colder, its sleep time will gradually increase, which is also a problem that Chen Yu is more worried about. Moreover, only She Er is guarding it alone. If he lets the black python run away without paying attention, it will be a big loss! Chen Yu did not bring Fengying and Erha with him on this operation. They should save enough physical strength first, so that they can be more useful in the battle.

Because the swamp was not far from Cuihu Lake, it didn't take Chen Yu too much time to get there. In less than twenty minutes, Chen Yu had reached the swamp.

Following the route he took last time, Chen Yu searched for She Er.

This time, She Er did not stay in the same place, but found a new place to hide, because Chen Yu did not see its figure on the dry tree. The hiding area of ​​the black python is within a kilometer radius of the center of the swamp. As long as the black python does not move, She Er will stay nearby and will not go far. According to Chen Yu's judgment, the black python is seriously injured and must find a place to heal quietly.

Moreover, the black python has always looked down on Chen Yu. In its mind, Chen Yu had already died.