After a night of negotiation and closer, the same "Great Leap Forward" movement as the Shennong clan was also launched in the Tianhuo tribe.

The location of the Tianhuo tribe is very peculiar, standing on a high ground of the Tianhuo tribe and looking north, except for the overgrown plains, there are one after another soil bags continuously, forming a natural "horn" shaped terrain to the north.

There are also a few mounds that are not very low, and six of them are as high as hills, which seem to be spread out from east to west, and every two of them form a semi-open canyon.

Three days later, Yu Guang took out his homemade charcoal pen and drew this peculiar terrain on a sheepskin, plus other terrain, and a simple topographic map appeared.

The big stone standing on the side touched his head and was shocked: "Oh my God! Isn't this the habitat of the Heavenly Fire Clan? ”

Yu Guang smiled and nodded: "Dashi, have you often fought with the Ula people north of these six hills?" ”

At this time, the Heavenly Fire Witch also came forward.

"Light Warriors, for several spring and autumn periods, our Tianhuo Warriors were here to intercept the Ula people, and then the Tianhuo Warriors suffered too many casualties, so they retreated to the back area, and in the last few Spring and Autumn Periods, they even fought in the habitat."

Yu Guang thought about it for a while, then took out a sheepskin again, and began to draw a map of several villages of the Tianhuo tribe, and after drawing, he used charcoal to enclose some of the villages.

Then he said to him: "I propose to fence this area with earth and stones, build a 'city', and then dig a deep trench around it, and the place outside the 'city' can be slash-and-burn again!" ”

"'City'? What is the city? "The Heavenly Fire Witch was puzzled.

Yu Guang pointed to some simple houses in the village and said, "Those are houses, which can shelter from the wind and rain and protect against wild beasts." The 'city' can defend against not only wild beasts, but also enemies like the Ullahs. ”

The Heavenly Fire Witch and the big stone on the side both lowered their heads and pondered for a while when they heard this, and suddenly the Heavenly Fire Witch laughed excitedly: "Very good, very good!" Just build the city! ”

Yu Guang smiled awkwardly, looking at Da Shi, who was still confused and contemplative, and the smiling Tianhuo Witch, he didn't know if they really thought of it.

"This plan still needs you to discuss with the Heavenly General Clan Leader, and you need to mobilize a lot of clansmen. Don't know if it's feasible or not? ”

"It's feasible, of course it's feasible, I'll go to the clan leader now!"

The Heavenly Fire Witch hurriedly went downhill to find their clan leader.

......

A large tribe of several thousand people is also a village that wants to be big in the future, as long as the planning is reasonable, the place he encloses is enough to accommodate ten thousand people, and this season is also suitable for civil construction.

Yu Guang decided to carefully plan the place he had enclosed, fortunately, this area was open land, without mountains and large areas of low-lying land, which was very suitable for building a city.

He took out a simple ruler and began to measure and design the diagram on the two parchment scrolls, and finally found the center point of the city map, because here he decided to build a place of governance for the Skyfire tribe, that is, the headquarters or residence of their great clan leader and the Skyfire Witch.

Then, spread from the center to the periphery, leaving the streets, fortunately there is an open space here, unlike in later generations, where every inch of land is expensive, he can leave a huge square around the center of the government at will, and the clansmen can have fun in their leisure time, and they can also train soldiers in wartime.

At this time, Yu Guang happily used charcoal to plan a piece of the new era tribal city, where he didn't have to consider the interests of later generations, and every civil construction he designed didn't need to be tendered, and he didn't need to pay the workers, as long as these plans were agreed by the Tianhuo clan leaders, I believe that the Tianhuo clan people would build as seriously as worker ants.

Moreover, this is a high-civilization primitive people in the Taihe River Valley, and their intelligence is on the high side, Yu Guang plans to hand over these prehistoric design drawings to some nimble people in the Tianhuo tribe to explain them in detail, and then assist them in laying the foundation and starting, and they can build a magnificent city.

......

"Heavenly Generals Clan, these pictures are the new appearance of the Tianhuo tribe in the future, the houses in the city are neatly built, and there are straight roads here to facilitate the tribesmen's walking; Here the people can exchange what they can't eat and use with each other; A large barn can be built here to pile up the harvest of corn......"

In the earthen house of the Tianhuo clan, Yu Guang explained the future plan in detail, and there were twenty or thirty young people around, staring closely at the parchment scroll of Yu Guang's fingers.

They are the people with flexible minds selected by Yu Guang in the clan, and they can be regarded as half of his apprentices, and the construction of the Tianhuo clan in the future will also need the command of these people, including the production of some tools, the manufacture of building materials, and the casting of gold and stone tools. He gave them all the methods.

Yu Guang's plan was to build houses with primitive rammed adobe, and if the entire city was built with bricks and stones, it would take too much time and effort, so it could be built with rammed adobe, and the newly designed houses were more suitable for such a quick build.

The ultra-high civilization technology of masonry houses in this era was slowly updated.

The city wall of the circle is made of soil, which is compacted and tamped with rammed earth, and is tamped and fastened with local loess, layer by layer, and each layer is nearly a foot thick.

In order to make the city wall strong and durable, the wall of the city wall was not made in a straight line, but the upper wall was retracted inward to become a "side foot". The thickness of the wall is four meters in the lower part, 3.5 meters in the upper part, and about six meters in height.

The walls made of earth were strong and durable, and they were highly defensive. At the gate and corner tower of the rammed earth city, the width of the city wall is widened, and the same method is done with the city wall, which is to make a rammed hole (cylinder coupon) in the lower part, and continue to ram the earth in the upper part, and the top of the wall is tiled with bricks, and then the pillars are erected to build a layer of houses, which is used as a city tower.

The castle tower is a symbol that tells you the location of the castle from a distance.

At the same time, it is also a defensive device that allows you to spy on the enemy, as well as to shoot arrows, with holes in it.

After the city is built, I believe that in this era, in addition to the Tianlei tribe can enter, there is no tribe in the world that can be the enemy.

With such a design, as the managers of the tribe, the Heavenly Fire Clan Leader and the Heavenly Fire Witch applauded after seeing it, "The Light Warrior is simply a celestial!" Such a city, even if the Ula people ride horses and beasts, they can't get in! It's just..."

"Great clan leader, what's wrong?" Yu Guang asked a little hesitant when he saw that the heavenly general.

The leader of the Heavenly Fire Clan sighed in distress, "The Ula people have raised a giant beast called Ang Ang, very tall and covered with long hair, and those giant beasts screamed loudly, so they were afraid of those beasts. ”

After the words of the Great Clan Leader, the atmosphere in the entire room fell into a gloomy again, as if they were all immersed in a nightmare.