The twenty-third year of the Dragon Tribe, at the end of the second month of summer, the ninth city of the Dragon Tribe, which lasted nearly two and a half years, was finally completed, located in the east of Yangcheng about a day's journey, close to the residence of the original rat tribe, and relatively close to the area where the source river flows into the Yellow River.

Su Yan gave the name "Zhongjing", which roughly means the capital of the center, and the dragon tribe or the soon-to-be-established state will be centered on Zhongjing and expand in all directions.

The ninth city is different from the first eight cities of the dragon tribe, the source city, Chicheng, Zhucheng, Yangcheng, Bincheng, Zhoucheng, Jicheng, Hucheng these eight cities all cover an area of more than 800 acres, the length and width of the city are 233 zhang, and the length and width of the Zhongjing city pool reach 333 zhang, covering an area of more than 1,600 acres, and two of the first eight cities together can be equal to a Zhongjing.

The gap is not only in the area of land, to the construction of the eighth city Hucheng, the construction at the beginning of spring, the construction will be completed when the autumn will come, the construction time is very short, and the construction time of Zhongjing is as long as two and a half years, but also the mobilization of more than 3,000 people, including slaves and servants, hundreds of cattle and horses, the rear of the city are supporting and assisting the construction of Zhongjing, which shows the scale of the construction of Zhongjing.

The walls of the first eight cities are all one zhang high, and only one person can walk above the city wall, while the city wall of Zhongjing is as high as two zhang, and three to four people can walk side by side at the same time, of course, the city wall of Zhongjing is not all made of brick and stone, the inside of the city wall is beaten solid earth, and the outside of the city wall is brick and stone, this kind of construction is enough.

Zhongjing covers a larger area, which means that it can accommodate more people, the first eight cities are designed to accommodate a population of about 10,000 people, and Zhongjing can accommodate a population of at least 20,000, and now Zhongjing has just been built, and the dragon tribe has moved 10,000 people to Zhongjing in batches.

The internal structure of Zhongjing is similar to that of the other eight cities, but there is one thing that is most different, Zhongjing is the capital of the country that is about to be established, Su Yan will sit in Zhongjing most of the time, and the mansion where Su Yan lives is upgraded to the palace, the palace is located in the north of Zhongjing, covering an area of nine acres, the north is the residential area, and the south is the area where Su Yan exercises power.

Zhongjing has been built, the country should be established, Su Yan decided to put the founding time on the first day of autumn.

……

Since the fall of the Aoki tribe to the completion of Zhongjing, nearly three years have actually passed, and in the past three years, the dragon tribe has changed too much, and the biggest change is the number of people.

Three years ago, the Dragon Tribe had more than 4,700 adult males and more than 9,300 adult females, totaling more than 37,700 people.

Nearly three years have passed, the total number of Dragon tribe people has only reached 60,000 people less than 200 people, the adult male tribe has reached more than 8,200 people, and the adult female tribe has reached more than 15,400 people, you must know that this is the statistical data at the beginning of the year, by the time Zhongjing was built, the total number of Dragon tribe people must exceed 60,000, plus the number of slaves and servants, the total population of the Dragon tribe has reached more than 64,000 people.

In three years, the total population of the Dragon Tribe has increased by more than 22,000 people, and there are three main reasons for such a large-scale population growth.

The first reason is the simplest, is the natural population growth of the dragon tribe, and the number of babies born to the dragon tribe last year has exceeded 4,000.

The Dragon Tribe is a young tribe, established only for twenty-three years, coupled with the development of medicine, every year the Dragon Tribe dies of old age and disease There are very few people, and in the past few years, the Dragon Tribe has hardly taken the initiative to wage wars against the outside world, and the Dragon Tribe has even fewer people who have died because of wars.

Based on the current population of the Dragon Tribe, even if it only relies on natural population growth, I am afraid that in eight years at most, the total population of the Dragon Tribes will exceed 100,000.

The second reason for the rapid population growth of the Dragon Tribe is due to the Aoki Tribe, which was already a hegemon-level tribe with a population of more than 5,000 before the fall of the Aoki Tribe, and the Dragon Tribe easily wiped out the Aoki Tribe, with more than 4,600 people being taken in by the Dragon Tribe, a small number of them reduced to slaves, and the rest were transformed into Dragon Tribesmen.

As for the third reason, it is the clans that have joined the dragon tribe in the past few years.

In three years, a total of six clans joined the Dragon Clan, namely the Deer Clan, the Wolf Clan, the Monkey Clan, the Tiger Clan, the Rain Clan, and the Bamboo Clan, bringing the number of clans owned by the Dragon Tribe to twenty in one fell swoop.

Among them, the Deer Clan and the Tiger Clan have duplicate names, Su Yan did not change the names of the newly joined Deer Clan and the Tiger Clan, but only added a "second" before them, the second Deer Clan, the Second Tiger Clan, and the original two can be called the First Deer Clan, the First Tiger Clan, and if there are Deer Clans and Tiger Clans to join in the future, add the prefixes of "third" and "fourth".

Prefixes such as "first" and "second" are only used to distinguish clans with the same name, representing the order of joining the dragon tribe, there is no division of strength and weakness, and in the dragon tribe, each clan has the same status.

The population of the Deer Clan, the Wolf Clan, the Monkey Clan, the Tiger Clan, the Rain Clan, and the Bamboo Clan together is more than 5,000, and as soon as they join, they become members of the Dragon Tribe, contributing more than the Aoki Clan.

The other five clans are skipped, focusing on the Bamboo Clan, the Bamboo Clan is a special clan among the six clans, before the Dragon Tribe, the Bamboo Clan is the most populous of the six clans, and the most powerful, the main reason is the word "bamboo".

There is a bamboo forest in the area near the original residence of the Zhu clan, and in the hundreds of years of exploration by the ancestors of the Zhu clan, the bamboo clan learned to use bamboo to make bows and arrows, compared to the simple bows and arrows of other tribes, the bows and arrows of the bamboo clan are better.

The bamboo bow and arrow gave the Bamboo Clan a considerable boost in strength, and in wars with other tribes, the Bamboo Clan was rarely defeated.

With bamboo bows and arrows, the hunting efficiency of the bamboo clan can also be improved to a certain extent, but with the population of the bamboo clan, no matter how high the hunting efficiency is, it can only occupy a secondary position in the way of obtaining food.

This year, the Dragon Tribe will also have two clans to join the Dragon Tribe, one is the (second) Bear Clan, and the other is the (second) Wolf Clan, which can add nearly two thousand people to the Dragon Tribe, and Su Yan has decided to move the two clans to the Dragon Tribe before the founding of the country.

The bear clan is relatively ordinary, and the wolf clan has attracted Su Yan's attention, saying that it is the "wolf clan", Su Yan feels that the "dog clan" or "dog clan" is more suitable, because the wolf clan actually domesticates wolves.