The tribesmen saw their warriors returning safely from a distance, with happy smiles on their faces.

They were worried after not seeing the tribe leader and warriors return for many days, but they believed that the tribe leader could protect the tribe leader and the tribe leader could bring the tribe warriors back safely.

Now, the soldiers not only returned safely, but also brought back salt. In their eyes, salt is more precious than gold.

"Clan leader!" Su Yun led someone to take over the backpacks carried by Su Yu and other warriors.

They came back earlier because the salt mine was very close to the tribe. They didn't follow for long and arrived the next day. They didn't expect that the salt mine was very close to the tribe.

Su Yu felt very uncomfortable when he heard what Su Yun said. If he had known earlier, he should have let Su Yun go to the grassland. After all, Su Xun can perform more freely in the forest.

That's all, Su Yu could only comfort himself in this way. This can be regarded as an experience. He has benefited a lot from these days' experience.

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

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

Both types of salt are actually coarse salt, but they contain different levels of impurities.

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

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

.

"That's good. This salt is still coarse salt and needs to be processed before it can be eaten. I will teach you how to process it tomorrow."

Su Yu was too tired these days and decided to take a day off and start working again tomorrow.

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

Open the system panel, and there is a message on it, "Your people have discovered a natural salt mine and gained 200 civilization points. They can gain 1 industrial point from mining every day."

Su Yu already had 11 industrial points. Su Yu clicked on the industrial panel for the first time.

[Productivity 1: Increase industrial productivity growth by 10%] (Upgrade requires 10 industrial points)

[Efficiency 1: Industrial production efficiency increased by 10%] (Upgrade requires 10 industrial points)

[Science 1: The probability of scientific and technological talents appearing is increased by 10%] (Upgrading requires 10 industrial points)

[Technology 1: The probability of technical talents appearing is increased by 10%] (Upgrading requires 10 industrial points)

Su Yu looked at it and added points to [Technology 1]. As for why he clicked this, how did the industrial revolution begin? It was the experience and innovation of craftsmen, and the Jenny spinning machine was the beginning of the first industrial revolution.

Its emergence is not due to scientific development, but to workers' transformation based on experience. Science and technology dominated the beginning of the second industrial revolution. Therefore, for today's tribes, technological accumulation is very important.

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

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

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

"Today's work is to process coarse salt. This is a very important job. Whoever learns the best will be the one I will give this task to."

Hearing the words of the clan leader, all the clan members here were eager to try. Su Yu couldn't judge whether the clan members had this talent through the panel, because the talent and skills would change. Sometimes it was clear that the talent was not there, but it appeared later.

Su Yu guessed that talent can be developed through acquired skills, just like skills, which will appear after learning.

After preparing the pottery basin, Su Yu first brought it back from the salt mine and poured it into it.

Then add water to dissolve it. After dissolving, Su Yu cleans up the impurities floating on the surface.

Then wait, waiting to allow the heavier impurities floating in the salt water to settle to the bottom of the pottery basin.

While waiting, Su Yu explained the principles to the tribesmen, and also briefly taught some physics and chemistry in junior high and high schools.

"Congratulations on imparting scientific knowledge to your people. Scientific concepts have appeared in their cognition, promoting the development of science. You have gained 200 civilization points, 10 cultural points, and 10 industrial points."

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

The industrial panel is clicked on [Science 1]. If you have accumulated 20 points of cultural points, click on [Literature 2: the efficiency of people learning letters is increased by 100] (the upgrade requires 20 cultural points). The remaining military points are increased.

In [Military Science 1].

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

The impurities slowly sank to the bottom of the basin. Su Yu saw that the impurities were almost settled, so he poured the much clearer salt water into another clay pot.

The impurities at the bottom of the basin were in the form of mud, and there was still a lot of salt in it. However, given the current conditions of the tribe, it was difficult to extract this salt, so Su Yu simply gave up on this salt.

Putting the impurities in a special pottery jar, Su Yu continued to precipitate the much clearer salt water 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, pour the salt water into the clay pot and place it on the fire to boil.

The water vapor continues to disperse, and the salt water in the clay pot becomes less and less.

Su Yu used peeled branches to stir while cooking. As the water gradually evaporated, salt crystals began to precipitate. Finally, a layer of white fine salt appeared at the bottom of the jar.

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

"Patriarch, this is so amazing!" Su Xun watched the whole process, and he also listened to everything Su Yu said about physics and chemistry.

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

"Okay, my demonstration is over. Now it's up to you to do your best. I'll be there to see who does the best."

Su Yu distributed tools to them. Now the tribe has a lot of pottery, which is more than enough for them to process fine salt.

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

When everyone was finished, Su Yu chose a tribesman who completed the work quickly and well to be the person in charge of salt production, and then selected twenty top tribesmen to form a salt-making workshop. Su Yu built a house specifically as a

Special site for salt production.

Su Xun is not slow in making salt, but Su Yu will not let him go to make salt. He is expected to form a reconnaissance team in a few days. Su Yu now has the idea of ​​​​taking action against the Langshan tribe.

Because the tribe has developed to this day, it is increasingly short of manpower, and the adult labor force has begun to be insufficient.

At this time, if you want someone to use it, you have to rob people. If you rely on natural growth, Su Yu can't afford to wait. It is the fastest to rob, because with the bonus of talent, Su Yu is not afraid that the people he robs will rebel.

Those who refuse to surrender are killed, and the remaining ones who are willing to surrender will naturally lose the will to resist after waiting for a long time.

As for using pottery to replace people, when there was not much pottery before, there was no need to consider using pottery to replace people. After all, this must first satisfy the tribe's own needs.

Now the scale of pottery production has also increased. Three earthen kilns are operating together, and the production is taking turns 24 hours a day. The pottery has already begun to be abundant.
Chapter completed!