In a whole day, nearly 200 bamboo tubes were used, and less than five liters of water were finally collected, and about one-tenth of the black mud was mixed in it.

- That's not enough to feed 30 people a day, right?

Even if Grandma said that saving little by little can add up a lot, this number still forced Jin Mang to use his brains.

She remembers that a friend bought an early education product for her son had a material package for making a water purification filter, and she posted it in the circle of friends, and she vaguely remembered that it seemed to be black golden sand...... What else?

Forget it, it's something she can't get at the moment.

Jin Mang thought for a while, and finally remembered that activated carbon has an adsorption effect and can purify water and air.

As for how to make activated charcoal, she pondered for a while and really figured it out. Taking out two large mussel shells from the grain cart, Jin Mang put some small pieces of wood into one mussel shell, covered it with another mussel shell, and then placed it in the fire to heat it.

After that, the charcoal from the mussel shell is taken out, cooled and washed, then mashed and dried.

In this way, the activated carbon is considered to be completed.

- The whole process took Jin Mang half a day to complete, which is also due to the hot climate today.

Jin Mang was a little excited to tie the gauze rattan cloth to the mouth of the bamboo tube that was empty at both ends, and in order to avoid insufficient load-bearing, she also wrapped a few more layers, and then carefully poured activated carbon into it.

She first put the water filtered out of the swamp mud into the filter she had made simply, and after waiting patiently for more than ten minutes, a shallow layer of clear water gathered from the water that fell from under the filter.

Jin Mang took a look at it, the water was clear, and when he smelled it again, the stench before was gone.

She couldn't help but be overjoyed.

Figuring out what she had done, the rest of the tribe was stunned.

If given a choice, who likes to drink foul-smelling water?

Lan Ya held the filter made by Jin Mang with a happy face, and couldn't help but sigh: "If only this could filter out the water in the swamp mud." ”

"Who's to say you can't?" Jin Mang couldn't help but say, "Isn't this a very simple thing?" ”

With that, she took out a piece of gauze and rattan cloth that she usually used to wipe her sweat, grabbed a handful of wet swamp mud and put it into it, then wrapped it in a special way, and then twisted it vigorously.

After a while, the water in the swamp mud was squeezed out by Jin Mang, although it was not very clean, not much cleaner than the original filtered water, but the efficiency was more than ten times greater.

——This method Jin Mang actually completely copied the method of killing water for vegetables when making dumpling stuffing in the previous life.

Everyone was stunned again, Qingyan was the first to react, I don't know where to find a piece of gauze and rattan cloth, and I also learned from Jin Mang and began to squeeze the water.

However, it looks like a very simple thing, although Qingyan has also done it, but the amount of water she squeezed out is obviously not as much as Jin Mang, and the swamp mud leaks out at the back.

She was a little confused, but Jin Mang was not surprised.

It looks simple, but she learned it from a pastry master who has been in her family for generations, and this method of killing vegetables is the essence of their family's improvement from generation to generation.

At that time, the teacher's temper was stinky, and he insisted that they couldn't learn it, so Jin Mang fell in love with him, and it took him two years to learn this technique.

Originally, when it was dark, their tribe would begin to rest, and only a few people in charge of the vigil would sit by the fire.

However, on this day, a large family gathered together, following Jin Mang to learn the technique of killing water.

Jin Mang was the most efficient, squeezing out about a basin of dirty water in less than an hour. Qingfeng didn't have the patience to learn the method of killing water, so he was responsible for filtering the dirty water next to him. Qingsui also learned the technique of killing water from Jin Mang, but the efficiency was not very high for the time being, so he gave Qingfeng a hand from time to time.

Finally, before going to sleep, the family of three had already filtered out two bamboo tubes of clean water, and there were still more than a dozen filters left, and it was estimated that they would be able to harvest another five or six bamboo tubes of water tomorrow morning.

- That's because there is not enough activated carbon.

The harvest of others is not as big as theirs, but there is clear water in a bamboo tube for each family.

Early the next morning, they began to hurry again, but those who sat in the grain carts, such as Jin Mang, did not stop filtering the water.

Activated carbon is used many times, and if it adsorbs too much soil, it needs to be replaced. So, having accumulated enough experience, they focused on burning charcoal and killing water every time they set up camp, and the night watchmen were responsible for filtering the clean water, and the people on the grain carts continued to filter the water on the way.

Later, there were not enough bamboo tubes, and they cut a lot of bamboo along the way for backup.

In order to filter out more water, they also slowed down. It wasn't until they found out that the swamp had also dried up completely that they actually left the swamp area.

Rao is like this, and most of the area in the grain cart is still occupied by them with bamboo tubes filled with water.

On the other hand, they are almost out of food, and if they want to eat again, they have to hunt.

Then Jin Mang noticed a strange thing, after leaving the swamp, many adults, including Qingfeng and Qingsui, began to eat greatly less.

When she looked closely, she noticed that the two of them filled her stomach very much each time, and if there was any leftover, they would eat it.

- Because of today's weather, meat that has not been cured and processed will definitely not be able to be put away, and it will stink in less than half a day. Jin Mang had also pondered making jerky, but ...... I can't eat enough, so where will I get the meat to make jerky for her?

Jin Mang also thought that they were hungry and gave her what they were eating, and she lost her temper.

- Isn't it stupid to feed one of your children while two adults are starving? Will they starve to death, will they be able to live?

However, not only were those two not ashamed, but they were still confused?

"Mang Mang is a good boy." Grandma smiled and took her to her side and explained to her, "Your parents are gradually fasting. ”

Fasting?

Jin Mang frowned, "Is it the same as those hibernating animals?" "But the green maple and green ears do not hibernate.

"It can't be said to be exactly the same." Grandma said: "In order to support the elderly and raise children, adults like your parents will fast like this and save food. Although there will certainly be enough prey for the second half of the migration, the food that will be hunted will definitely not be enough for everyone to eat. You are a cub, if you don't eat enough, the root bones will be affected, and the body of an old bone like me has begun to decline, if you don't eat enough, you will get sick or even die. ”

She touched Jin Mang's head and said softly: "Your parents have accumulated enough energy in their bodies before this, and if they fast for a period of time, their bodies will be emaciated, but there will be no other effects. ”

"Even ......"