Because of the return of Ye Xiao and the others, the camp became lively again.

After returning to the camp, Ye Xiao briefly asked Xiao Ma and the others if anything had happened after they left.

"It was quite calm a few days ago, but yesterday the Kunshan tribe came here and told me something."

"Oh? What's the situation? ”

"They say that just the day before yesterday, the Black Ya tribe that attacked us before forced a small tribe to submit to them by force."

"And did they come back to attack our camp?"

"Not really."

……

Through their conversation with the pony, Ye Xiao learned something.

Among them, what he paid the most attention to was some small actions of the Heiya tribe recently.

Since the failure of the last attack on them, the Heiya tribe has been silent for a while, and Ye Xiao wondered why he didn't find anyone from the Heiya tribe at the Salt Lake Tribe Fair, it turned out that he was engaged in this kind of expansion.

From the corners of the mouths of the two people from the Heiya tribe who were captured last time, they knew that the Heiya tribe had been controlled by those people who had crossed over with them.

Last time, Ye Xiao observed very clearly, the commander of that wave of people was a typical face of country M, and there were several short special forces of country Y.

The people of country M like to be the world's policemen, which the whole world knows, ostensibly under the banner of maintaining world peace, but wherever they go, there will be war.

While the slogan of maintaining world peace is on its lips, it arbitrarily interferes in the internal affairs of other countries, and this is the so-called hegemonist country, and this person of country M has put this point into full play.

When I came to this world, the first thing I did was to control a big tribe, and then I wanted to hit their attention, and after failing, it didn't take long for me to stop, and I started to buy and sell other people's territories at will.

As the sharp blade of the country, when Ye Xiao was on a mission outside, he had seen the shadow of the people of country M in those war-torn countries, and they had witnessed the hurtful things that the soldiers of country M did in those countries, so Ye Xiao never had a good impression of the people of country M.

It's just that in this world, this kind of thing happens often, and Ye Xiao just told the pony to pay attention to it, so he didn't care about it, as long as the other party didn't provoke them, Ye Xiao didn't bother to care about this kind of thing.

Now, Ye Xiao has a more important thing to do: purifying salt.

Among the things they exchanged at the Salt Lake Tribal Fair, salt was the most important thing, but in this way salt was coarse salt, and there were many impurities, and if they wanted to eat it, they had to be purified.

Ye Xiao didn't know if those primitive people would purify the salt, but they couldn't stand this bitter taste.

The method of extracting coarse salt is quite simple, get some clean water, put the coarse salt crystals in it and make it all melt into the water, and then filter.

This purification method can actually only filter out some larger particles that are insoluble in water, because there is no gauze, Ye Xiao had to take out the shirt he wore before.

I folded the shirt in half several times, then covered it with an empty stone bowl, and brought the salt water from top to bottom, and sure enough, it was only filtered once, and a lot of impurities were left on the shirt.

This is repeated several times until there are no more impurities, and the first step of filtration is over.

Next, it is recrystallized, and the brine at this time can also be called brine, and there are several ways to crystallize salt from brine

For example, salt can be dried in the sun, and in some places in China near the sea, salt is produced by this method.

They will introduce clean seawater into special salt pans, which are very shallow, and the sea water enters them, and under the sunlight, the water slowly evaporates, and the white crystals left behind are sea salt, which is also relatively coarse.

But this method requires plenty of sunlight, which, obviously, is not used here.

Then, there is another method, which also uses the principle of evaporation, but not by sunlight, but by direct heating.

This method is fast-working, time-saving and labor-saving, and is most suitable in such cold conditions.

Ye Xiao poured the brine into the stone pot, the fire was blazing, the stone pot gradually became hot, and the water slowly evaporated.

When the brine in the stone pot was almost evaporated, Ye Xiao extinguished the flame and used the residual heat of the stone pot to evaporate the last bit of water.

A layer of white crystals was left in the pot, and Ye Xiao scraped them off one by one with a knife, and then put them in a small bamboo tube.

The purified salt did not have the previous pale yellow, it became white as snow, Ye Xiao dipped a little with his index finger and put it in his mouth to taste it, the bitterness and astringency were much lighter, and it could almost be said that it was gone.