After the idea of ​​the city wall came up, Han Cheng suddenly felt that his thoughts were clear.

However, strictly speaking, after the new outer wall was built, it is not really appropriate to call the old wall a 瓮城.

Because generally speaking, a barbican is something similar to a small city built at the city gate relying on the city wall. It is connected to the outer city wall and is very close to it.

The benefits of a 瓮城 are also obvious. For example, when an enemy attacks, you can deliberately show weakness to the enemy, lure them into the city gate and the narrow 瓮城, and then block the city gate and the gate of the 瓮城, and you can happily catch the turtle in the urn.

According to Han Cheng's current idea, the distance between the new wall to be built in the future and the old wall will definitely be very large.

There is a large distance between the new and old walls, and they are not connected, which is quite different from the 瓮城.

If we really want to give a relatively accurate definition, calling it the inner city is a bit rough, just like the imperial city built in the capital.

Of course, judging from the scale of the Qingque tribe’s wall, it is not quite appropriate to call it a city. It would be more appropriate to call it an inner courtyard.

The new wall being built outside can barely be called a city, with a city of three miles and a suburb of seven miles.

The newly planned wall is two kilometers long and one thousand meters wide. According to the definition of a small city in the Spring and Autumn Period, it can indeed be called a city.

Han Cheng was thinking randomly in his mind, and then he sniffed slightly, because if the old wall was not demolished, then his renderings would need to be redone, and many of the previous plans would need to be disrupted and started over.

For someone who is not very good at painting, this is not a very pleasant experience.

After hesitating for a while, Han Cheng chose to keep the old wall or not.

Because the benefits of leaving the old wall intact are obvious. On the one hand, it can save time and labor during construction, and on the other hand, it can enhance the tribe's defense capabilities.

One day in the future, if the tribe really encounters a powerful enemy and the outermost wall is breached, the people in the tribe can still rely on the old wall to resist.

Another benefit is that it can better deal with the problem of slave yards.

The slaves in the tribe were difficult to deal with. According to his previous idea, after the new wall was built, the slave courtyard would be moved outside the wall.

But demolishing and rebuilding the courtyard is always a hassle.

Now that the old wall remains intact, these problems can be easily solved.

The slave yard can continue to exist here, and the people inside can still live within the range of bows and arrows. Moreover, when the tribe is in danger, these slaves will not be in a particularly dangerous area.

It is true that these people are slaves, but Han Cheng also does not want them to die in vain for no reason.

Because living slaves can do a lot for the tribe, and dead slaves have no value or meaning at all except being burned to ashes.

After lying here and thinking for a long time, Han Chengcai finally fell asleep.

The next day, Han Cheng found the rendering that he had worked so hard to create. He held it in his hand and hesitated for a few seconds, but in the end he couldn't bring himself to tear it up.

Although this thing has lost its greatest significance, it is still nice to keep it here as a decoration.

So, after breakfast, Han Cheng took his pen, ink, paper and inkstone and locked himself in the room again.

Wu, who was not holding the rabbit, was carefully looking at the rendering that was discarded by Han Cheng in the house. After looking at it for a while, he reached out and touched it gently, with a sense of intoxication.

After looking at it for a while, I looked up at the big blue brick and tile house, and a feeling of emotion couldn't help but emerge in my heart.

In the eyes of him and everyone in the tribe, the effect is very, very good, but the Son of God is still not satisfied?

Ready to draw better?

The renderings that the Son of God looked down upon were so shocking, I wonder how astonishing the new ones that the Son of God is preparing to draw will be!

Inside the room, Han Cheng was quietly writing and drawing at his desk, making revisions according to his ideas from last night.

This time, there have been major revisions compared to before.

The entire inner courtyard has only one function, which is the residential area, plus a square and a canteen.

He moved the place for storing grain to the outer city, and when the time comes, he will build two walls between the inner wall and the outer wall, dividing the entire outer part into three unequal parts.

The highest terrain is used to store grain, the area near the west is used for breeding, and the remaining land is used to build various workshops and store hay.

In this way, things like fodder will be separated from residential areas by walls, making them safer and more secure.

Of course, corresponding to this, several doors need to be opened on the old wall to connect with these areas. This will not only facilitate people's entry and exit, but also provide a good defense against the slaves living outside.

The first time is new, the second time is familiar, and the third time you can be a master. This saying is actually applicable in many times and many places.

With the experience of outlining the effect last time, Han Cheng was able to do it much faster this time. After ten days, it was completed again.

After the renderings came out, they received unanimous praise from everyone without any surprise.

Most people who have lived in the tribe for so long have a complex about the old walls of the tribe.

Now in the new renderings, the old wall has been preserved intact and looks better than before. How can they not be happy?

Even the slaves in the slave yard were very happy when they saw the new renderings.

Because this time they will be protected by the wall...

After the new plan was made, two days later, Han Cheng found Heiwa, who was still fiddling with the mold, and asked him to put the mold work aside for the time being as he had other things that needed Heiwa to do.

Although we are going to put the mold making matter aside for the time being, in fact the production of molds has not stopped, because there are now four people who have learned how to make molds.

Although it is not as fast or good as Heiwa's, the things he made are still usable.

It is like this with many things. The first step is the hardest. After Heiwa breaks through this layer of paper and takes the first step, making the mold becomes a matter of time and skill for other people in the Qingque tribe.

The thing Han Cheng called Heiwa to make this time was actually a ceramic pipe.

Although he didn't know much about building cities, Han Cheng, who had experienced too many summers in later generations where people could row boats on the road as long as there was a slight sudden rain, had a deep understanding of the importance of drainage facilities.