The inhabitants of the tribe saw their warriors return safely from afar, and their faces were smiling happily.

They were also worried that they had not seen the patriarch and the warriors return for many days, but they believed that the warriors of the tribe would be able to protect the patriarch and that the patriarch would be able to bring the warriors back safely.

Now, the warriors not only returned safely, but also brought back salt, which in their eyes was more precious than gold.

"Patriarch!" Su Yun took the back basket from Su Yu and the other soldiers with someone.

They came back earlier, because the salt mine was very close to the tribe, they didn't follow it for long, and they waited the next day, not expecting the salt mine to be close to the tribe at all.

When Su Yu heard Su Yun say this, he felt very uncomfortable, he should have let Su Yun go to the grassland, after all, Su Xun was more comfortable in the forest.

That's it, Su Yu can only comfort himself like this in his heart, this can be regarded as an experience, and he has benefited a lot from the experience of these days.

The tribe now has two kinds of salt, one brought back from the salt lake and the other from the salt mine.

The two types of salt are easy to distinguish, the salt lake is as white as snow, and many of the impurities brought back from the salt mine look yellow.

Both salts are actually coarse salts, but the degree of impurities is different.

"You didn't eat the salt directly, did you?" Su Yu asked.

"No, although we know it's salt, we don't dare to eat it." Su Yun shook his head, this salt looked yellow, and there were still a lot of earth-like things on it, they were not blind, and they knew that this thing was unhygienic now.

"That's good, this salt is still coarse salt, you can only eat it after processing, and I'll teach you how to process it tomorrow."

Su Yu was too tired these days, so he decided to take a day off and start work tomorrow.

At noon, after eating a few days of dry smoked fish, Su Yu felt that the fresh grilled fish was extremely sweet.

Open the system panel and there will be a message on it, "Your people have discovered a natural salt mine, gain 200 civilization points, and mine it every day to earn 1 industry point." ”

Industrial points Su Yu already has 11 points, and Su Yu clicked on the industrial panel for the first time.

[Productivity I.: Increase Industrial Productivity Growth by 10%] (10 Industrial Points required to upgrade)

[Efficiency I.: Industrial production efficiency increased by 10%] (Industrial points 10 required for upgrade)

[Science I.: Increases the probability of appearing a tech talent by 10%] (10 Industrial Points are required to upgrade)

[Skill I.: Increases the probability of the appearance of skilled personnel by 10%] (10 Industrial Points are required to upgrade)

Su Yu took a look at it and added the points to [Technique I.]. As for why this is pointed, how the Industrial Revolution began, it was innovated by the experience of craftsmen, and the Jenny spinning machine was the beginning of the first industrial revolution, and its appearance was not the cause of scientific development, but the transformation of workers according to experience. Science and technology were the leading factors at the beginning of the Second Industrial Revolution. Therefore, for the current tribe, the accumulation of technology is very important.

In fact, the main reason is that science is still too far away for the people of the tribe, and it is more practical to develop technology first, and it is more effective for the development of the tribe.

However, when processing coarse salt, they need to learn physics and chemistry.

The next day, Su Yu and his people prepared to process coarse salt.

"Today's work is to process coarse salt, which is a very important job, and whoever learns the best, I will give this task to whom."

Hearing the patriarch's words, all the clansmen present were eager to try. Su Yu couldn't tell if the clansmen had this talent through the panel, because the talent and skills would change. Sometimes you don't have the talent, but it comes later.

Su Yu guessed that talent can be developed through the day after tomorrow, just like skills, it will appear after learning the day after tomorrow.

Preparing the clay pot, Su Yu first brought it back from the salt mine and poured it in.

Then add water to dissolve, and after dissolving, Su Yu cleaned up the impurities floating on the surface.

Then wait, waiting to allow the heavier impurities floating in the brine to settle to the bottom of the pot.

While waiting, Su Yu explained the principle to the clansmen, and by the way, he simply taught some physics and chemistry in junior high and high school.

"Congratulations on imparting scientific knowledge to your people, scientific concepts appear in their cognition, promote the development of science, and earn 200 civilization points, 10 culture points, and 10 industry points."

Su Yu was surprised, but quickly reacted and added up the points.

The industrial panel is on [Science I.], and the accumulated 20 culture points are on [Text II.: The efficiency of the people learning words is increased by 100] (20 culture points are required to upgrade), and the remaining military points are added to [Military Science I.].

Su Yu closed the panel and waited for the salt water to settle.

The impurities slowly sank to the bottom of the pot, and Su Yu saw that the impurities had almost settled, so he poured a lot of clear salt water into another clay pot.

The impurities at the bottom of the basin are muddy, and there is a lot of salt in it, but with the current conditions of the tribe, these salts are difficult to extract, so Su Yu simply gave up this bit of salt.

Putting the impurities in a special clay jar, Su Yu continued to precipitate the much clear brine again, going back and forth several times.

If the tribe had a filter, Su Yu would never choose such a time-consuming and laborious method, but unfortunately, it didn't.

After filtering the impurities, the brine is poured into the clay pot and placed on the fire to boil.

The water vapor is constantly drifting away, and the salt water in the clay pot is getting less and less.

Su Yu stirred with the peeled twigs while cooking, and when the water gradually evaporated, the salt crystals began to precipitate. Eventually, a layer of fine white salt appeared at the bottom of the jar.

The onlookers watched as the yellowed, large-grained coarse salt turned into white, delicate fine salt.

"Patriarch, this is amazing!" Su Xun watched the whole process, and he listened to all the physical chemistry that Su Yu said.

"This is the charm of science, and I will teach you more scientific knowledge later."

"Alright, my demonstration is over. Now it's up to you to play, and I'll see who does the best. ”

Su Yu distributed tools to them, and now the tribe has a lot of pottery, and it is more than enough to send them to process fine salt.

So, Su Yu walked back and forth between them, correcting their mistakes by the way.

When everyone was done, Su Yu chose a fast and good clansman to become the person in charge of salt making, and then selected twenty top-ranked clansmen to form a salt mill, and Su Yu specially built a house as a special site for salt making.

Su Xun's salt-making speed is not slow, but Su Yu won't let him run to make salt. In a few days, I still expect him to form a reconnaissance team, Su Yu now has the idea of doing something to the Wolf Mountain tribe.

Because the tribe has grown to the present, there is a shortage of manpower, and the adult labor force has begun to run out.

At this time, if you want someone to use it, you have to rob people, and if you rely on natural growth, Su Yu can't afford to wait. is still the fastest to grab, because of the bonus of talent, Su Yu is not afraid that the person who grabbed it will rebel at all. Kill those who don't surrender, and the rest of those who will surrender will naturally have no intention of resisting after staying for a long time.

And the exchange of pottery, in the case of not many pottery before, there is no need to consider replacing people with pottery, after all, this must first meet the needs of the tribe itself.

Now the scale of pottery production has also risen, and the three clay kilns have been started together, taking turns to produce in shifts 24 hours a day, and the pottery has long begun to be surplus.

Now Su Yu felt that he could consider setting up a caravan to go to other tribes to trade pottery for people and other goods.