After obtaining the blueprints of the rammed earth city wall, Su Yu prepared to build the rammed earth city wall the next day.

The importance of rammed earth walls to the tribe cannot be overstated.

Although it is somewhat inconvenient to build the walls in winter, the benefits are also obvious, and there is enough time and no one will disturb you.

Originally, Su Yu still wanted to teach, but because of the rammed earth wall, Su Yu had to move this work to the evening.

Su Yu gave the construction technology of the rammed earth city wall to Su Zhuang and his clansmen, and put them in charge of the project.

Rammed earth walls are rammed earth, but not all earth, and the middle of the wall needs to be filled with stones to reinforce.

The construction of rammed earth walls required planning in advance to ensure that the entire tribal camp could be included.

It is also necessary to leave space to expand, but it does not need much space now, it only needs to be able to surround the tribal camp and make some space, and if it needs to be expanded, then continue to build a wall to form the inner and outer cities.

Su Yu took a look at it and decided to build a one-kilometer-long and wide city wall, too long and unnecessary, that would only increase the workload and prolong the construction time. Now the population of the tribe does not need much space. Even a kilometer long and wide city wall would take a long time for the tribe to build.

The tribe was almost all mobilized, both men and women were involved in the construction of the walls, and only some of the tribesmen who had regular jobs themselves were engaged in their own work. In order to speed up the construction, Su Yu also asked people to go to the greedy wolf camp to ask people to build the city wall together.

"Patriarch, do we still have to trade with nearby tribes again?" Su Xun, who was doing his work, suddenly asked.

"Of course you have to go, you will continue to go tomorrow, if you encounter a famine tribe, you can go and publicize that we are recruiting people to work here, and you can provide food and shelter. There are too few of us, and it's still not enough to build a city wall," Su Yu said.

He found that the tribe's labor force was still somewhat scarce, and the construction of rammed-earth walls was a lot of work.

The current speed of construction is very impressive, it took a morning to build, and only a dozen meters long, and the height of the city wall is less than one and a half meters, and the thickness is only two meters. This is still the speed of one battle, if it is divided into four heads, I am afraid it will be turtle speed, and it may not be completed after the winter has passed.

"Understood, Patriarch."

There are many tribes that lack food in winter, and if it is a recruitment package for food and shelter, then there must be many tribes who will drag their families and run over.

A day passed, and the construction of the rammed earth city wall got off to a good start, and the city wall was built more than 30 meters long, but the height was still only 1.5 meters.

In the evening, Su Yu gave them a lesson, and at the same time began to teach the four white frost sisters some knowledge related to their talents. Su Yu used to be an Internet otaku, and he was exposed to all knowledge on the Internet, and he also watched a lot of short videos.

I know a little about everything, but I just understand some of it, and I don't learn it well.

Su Yu didn't expect to be able to teach them much, and the rest could only rely on their own, unless there were books related to these fields sold in the later mall or obtained from future victory rewards.

It was another dull day, and Su Yu fell asleep.

Early in the morning, Ji Ni and Su Xun set off, bringing salted fish and pottery. This time there was no white salt, and Su Yu found that there was no need to sell salt with salted fish. Anyway, it doesn't make a difference, for people from other tribes, this fish is not as important as salt, not as important as salt.

Thinking of the tribe's piles of salted fish, if you don't dispose of them, you can't eat them at all.

Su Xun and the others left, and Su Yu continued to devote himself to the great cause of building the city wall.

……

Looking at the map, Su Xun and Ji Ni moved in a different direction, and there was a high mountain called Yanshan in that direction, naturally, there was a tribe named Yanshan there.

At this time, the Yanshan tribe is facing a food crisis in their eyes, their tribe's wild fruits have been eaten, and the heavy snow for a month has made it impossible for them to go out to hunt, and after the heavy snowfall, the animals in the forest have hibernated, and they can't find a trace of animals.

Seeing that food was getting scarce, they couldn't do anything about it.

Today, they go out to look for food as usual, but now they don't have much energy.

"Patriarch, do you see there's something over there?" A member of the Yanshan tribe suddenly saw a black figure moving at the end of the white snowy scene in the distance.

"Let's take a look." The patriarch of the Yanshan tribe looked over there and also noticed a black shadow moving, and immediately thought that there was prey, and excitedly ran over with people.

When he got closer, he realized that the shadow was not prey, but a group of people about the size of his own.

There were many tall animals around them that they didn't know.

This group of people is Su Xun and them, the people of the Yanshan tribe saw Su Xun and his party, and Su Xun also discovered them.

The people on both sides glanced at each other, and finally the patriarch of the Yanshan tribe spoke.

"Where are you from?"

"We are a caravan from the great tribes of the East, all the way west to trade." Ji Ni stood up and talked to the patriarch of the Yanshan tribe.

"Caravan, here to trade?" The patriarch of the Yanshan tribe automatically filtered out the words of the East and the West that he didn't understand, and obtained the most important words.

Looking at Ji Ni, the patriarch of the Yanshan tribe seemed to remember this face, as if he had seen it before.

"Do you have food?" He didn't remember, he just didn't think about it, and asked.

Now what they needed most was food, and nothing else could arouse his interest.

"Yes, we have a food called salted fish, which is not only edible but also salty." Ji Ni introduced. Su Xun was studying on the sidelines, and he was a little interested in business.

"Show me." When the patriarch of the Yanshan tribe heard that there was food, his eyes lit up.

Ji Ni asked someone to take out a salted fish and handed it to him.

"This is salted fish?" The patriarch of the Yanshan tribe held the salted fish, and felt that the salted fish was hard, and there was a strong salty taste on his hands after touching it.

"How do you change this salted fish?" Since it is food, the patriarch of the Yanshan tribe will definitely not let it go, and since they will take it out and buy it, it should be edible.

"It depends on what you have." Ji Ni replied.

"What do we have?" The patriarch of the Yanshan tribe remembered what was in his tribe.

"You go and get the contents out of the tribe's treasury." Suddenly, the patriarch of the Yanshan tribe thought of something and ordered the henchmen next to him.

"Patriarch, do you really want to take the contents of the treasure house?" The confidant asked uncertainly.

"Let you take it, is there anything else in the tribe that can be exchanged for now? The things in the treasure house are just put away, so it's better to take them out and use them. The patriarch of the Yanshan tribe explained.

"Yes, Patriarch."

"Can you trade anything for it?" Ji Ni asked again.

"Right now, now I'll have someone get it."

"Okay, let's wait." Since the business can be successful, there is no hurry to go to the next stop.

……