After the Eagle Clan joined the Dragon Tribe, Su Yan became busy, and Su Yan wanted to prepare pottery ID cards for the people of the Eagle Clan and those who had turned from slaves to regulars.

Compared with before, Su Yan no longer needs to do this alone, there are more people in the tribe who know words, Su Yan can hand over most of the processes to other clansmen to do, only the matter of naming still needs Su Yan to come personally.

Naming is the most important step, and there are barely some people in the tribe who can name them, but the clansmen want their king to name them, and the matter of naming them is not too tiring, so Su Yan did not leave this matter to others to do.

In the busy, the first one of this year slowly fell, the cold winter is coming, Su Yan feels that this year's winter is still a normal winter, and every time an abnormal winter like a cold winter comes, it will take several years to come, if the winter is cold every year, I am afraid that the primitive tribes living in this area and further north will not be able to hold on, and they will have to continue to migrate to the warmer areas in the south.

With the addition of the Eagle Clan and the integration of those slaves, coupled with the birth of newborns, the total population of the Dragon Tribes has once again made great strides.

By the end of this spring, the total population of the Dragon Tribes was just over two thousand people, with a total of two thousand and fifty-six people.

Now that winter has just begun, the total population of the Dragon Tribe has exceeded 3,000, reaching 3,000 and 3,000 people, including 372 adult males, 819 adult females, 899 boys, 860 girls, and 34 elderly and sick people.

The tribe of 3,000 people was definitely one of the most powerful tribes in the primitive era.

However, with the rapid increase in the population of the Dragon Tribe, a problem has emerged: the living area of the Dragon Tribe is sixty-six acres, and the Dragon Tribe has only more than 1,000 people at the beginning, and it seems relatively spacious to live in this sixty-six acres area, but the total population of the Dragon Tribe has increased to three thousand, and the area of sixty-six acres is only one and a half abbots per person on average, which will seem crowded on the surface. (Note 1)

In addition, animal pens, toilets and other buildings occupy a lot of space, and in fact, only about 40 acres of land can be used to build housing.

Fortunately, the Dragon Tribe is dominated by minors, and it does not seem too crowded in normal life, but as the children grow up, the 66-acre residential area will become more and more crowded, and the total population of the Dragon Tribe is still increasing.

With the current area of the residence, a maximum of 500 people can be squeezed in, and if there are more, the sanitation problems in the residence will be highlighted, and it will be difficult to block the epidemic in the event of an epidemic.

Expanding the area of the Dragon Tribe's residence has become the most important task of the Dragon Tribe's next year, and as early as the beginning of the construction of this new home, Su Yan has already thought about the expansion of the residence.

At the beginning, when the dragon tribe opened up the wasteland, a total of four square miles of land were opened up, which was replaced by 1,666 acres of land, 66 acres of land was used to build a new home, the outermost 800 acres of land was used to plant trees, and the inner 800 acres of land was used to plant hemp and millet, and the inner 800 acres of land was reserved for future expansion of residential land.

Thinking about it, Su Yan planned to directly expand the Dragon Tribe's residence to 866 acres of land, and directly use up all the 800 acres of land inside, saving future expansion.

Eight hundred and sixty-six acres of land is not small, it is a square area with a side length of 233 zhang, and it is also thirteen times the size of the current dragon tribe residence, which is a small city in ancient China.

Ancient Chinese cities are large and small, the small county covers an area of less than four square miles, the population is only a few thousand, the population of the larger county is only more than 10,000, but this should take into account that the courtyard of the large family in the county covers a vast area, and the small family also has its own courtyard, if all are only used to build houses for residents, even if a house only lives five people, a small county town can also live tens of thousands of people.

Su Yan plans to directly expand the residential area to 866 acres, and directly build a small city in one step, at least in the next few decades, Su Yan does not plan to continue to expand this small city.

A small city covering an area of nearly 900 acres is enough to accommodate tens of thousands of people, of course, Su Yan will not let the population of a city exceed 10,000, or even more than 5,000 people, after more than 5,000 people, Su Yan will choose a place to build a new city to expand the territory of the Dragon Tribe.

It's not a simple thing to build a small city, it's a big project, the total population of the dragon tribe is more than three thousand, and the available adult labor force can't reach a thousand, and there are other things to do on a daily basis, and five hundred people can be put into it.

Although the construction of a small city is a large amount of work, it can also be done slowly, after all, the dragon tribe cannot increase its population all at once.

Su Yan took the charcoal and sketched on the animal skin, and the outline of a small city soon appeared.

Small cities need city walls to block all invaders and beasts, city walls do not need to be high, one zhang can be, ancient Chinese city walls were built so tall mainly because of war, in the primitive era, only the dragon tribe attacked other tribes, other tribes did not dare to attack the dragon tribe at all, even if some tribes panicked, a one-zhang high city wall is enough to block them.

The height of the city wall is doubled, and it can be built directly with adobe bricks, and in addition, lookouts are set up in various areas of the city wall, and a total of eight lookouts can be set up, which can ensure that there are three lookouts on one side, and in the event of an accident, these lookouts are enough to detect the situation in advance.

After the city wall is over, the next step is the internal planning of the small city, and now the residence of the dragon tribe is the most central area of the small city, there is a city gate on all four city walls, and two three-zhang wide avenues cross in the most central area of the residence, forming a crossroads, and this intersection is the most central area of the small city.

The town is divided into four areas of about the same size with two roads, plus the central area, the town has a total of five areas, the future central area is the area where the high-level and middle-level people of the dragon tribe live, and it is also the area where the clansmen gather, and the surrounding four areas are the areas where ordinary clansmen live.

If it can, in the future, the people of the Dragon Tribe will live in one house per household, but now it is impossible, one house per household, as many adult male clansmen as there are in the Dragon Tribe, there are as many houses as there are to be built, and there are too many houses that need to be built, and it may not be completed in five years.

Toilets, drainage canals, garbage points, and by the way, wells, it took nearly ten days for Su Yan to slowly sketch out a small city.

Note 1: The length unit determined by the protagonist is li, zhang, ruler, inch, minute, centimeter, milli, decimal system, one foot is thirty centimeters, one zhang is three meters, originally one acre of land is 666 square meters, now it has become 600 square meters, one square abbot is nine square meters, and four square miles is one square kilometer.