Now in his fifth year in the otherworld, Gu has managed to expand his settlement to 2,600 people thanks to the food he has obtained from growing wheat and cassava (the name of the tubers he cultivated).

Not everyone now lives within the city walls, the city walls were built by Gu Guo and the first three tribes to join him, and the tribes who joined later did not sweat in the process of building the city, and the right to enjoy the protection of the city wall was not equal to the obligations they paid.

But Gu Guo still came up with a channel for people from outside the city to enter the city - exams.

The clansmen in the city naturally agreed, after all, Xiao Feng and Gui and others, who had graduated from elementary school arithmetic, built waterwheels and canals, and they did not have to carry wooden barrels to water the land bucket by bucket.

The importance of knowledge gradually manifested itself in the city, and when trading, those who had learned arithmetic suddenly calculated the results, while those who had not studied always had to break their fingers for a while.

A year ago, the yield of wheat had increased by leaps and bounds, and Gu Guo had been able to produce nearly 100 tons of wheat a year, excluding the amount to be used as seeds for the coming year, while the farmers who planted wheat consumed only half of it every year, and he invested all the rest of the grain in education.

He made it a rule that if anyone under the age of twelve could pass the elementary school arithmetic and literacy exams, there would be two places to live in the city.

If you have more relatives, in addition to your mother, grandmother, aunt, cousin and others, and feel that the quota is not enough, then you can continue to study.

After graduating from primary school, a junior high school will be opened, and in addition to continuing to study arithmetic, you will also have to choose one of physics and chemistry, and if you pass Gu Guo's examination within two years, you will be able to increase the number of places by two.

As soon as the mothers who lived outside the city heard that the city not only took care of their children's food, but also had the opportunity to live in the city, they stuffed their children under the age of twelve into Gu Guo's school.

So at the first opening ceremony of the primary school, more than 100 children standing in the audience lined up to eat with the desire to eat a full meal, after Gu Guo's speech that they seemed to understand or not.

Years later, Tanike, who graduated from high school, recalls entering elementary school in ignorance, and the most impressive thing is the first meal after the opening ceremony, which was food he had never seen before.

"At the beginning, Teacher Ji Xiaofeng took us to the place called the cafeteria, and we were in groups of ten people, gathered together. I thought I would use some wild fruits to send us to eat and drink that day, but I didn't expect that the first meal I had in the school was bread! ”

Since there was no such thing as yeast baking soda, the steamed buns and buns were hard, so the first meal Gu Guo made in elementary school was directly served with meat.

Dozens of tons of wheat are enough for these children to feed for an entire year.

However, Gu Guo still underestimated the determination and perseverance of the children, and with the encouragement that he and his mother could feed themselves, he put almost all his energy into studying.

There is no quota for entrance exams, students do not fall into involution, and the open learning atmosphere allows many children to pass the primary school exams in their first year and successfully enter secondary school.

In addition to the more than 100 students and teachers who were completely out of work, Gu Guo also trained a full-time army of 90 people at the beginning of the fifth year.

Due to the daily training of these ninety people, the consumption of food is much more than that of the children who only study every day, which is also the reason why Gu Guo waited until the fifth year to start the conscription, of course, the soldiers who enlisted in the army also have two places to live in the city.

Pigskin and camelina who were originally squad leaders have now been promoted to the platoon commander who manages a team of thirty people, and the other platoon leader is his second uncle Hua.

Gu Guo had to firmly control the military power in his own hands, so the officers he promoted were all his cronies, and those soldiers from outside the city, after taking their mother into the city, half of their butts were stained in the city, and they were cut off from the original clan interests.

This army of Gu Guo can suppress any tribe that is against the water, and the orange and shiny bronze saber on the soldier's waist is not something that a backward stone axe can deal with, plus the neat queue phalanx, even if it encounters three times the enemy of his own, he has the power to fight.

At this time, there were 600 permanent residents in the city, and about 2,000 people were scattered outside the city, and the social system at this time was more like the national system in the Western Zhou Dynasty, with different ruling policies and exploitation methods for people inside and outside the city.

The division of the two classes has begun, and the channel for class ascent has been opened by Gu Guo, and that is learning.

After two years of expansion, the wheat field is two square kilometers in size, but such a large planting area can only support more than 3,000 people.

Gu Guo had already gathered all the tribes that participated in the gathering five years ago under the city walls, and these people were all the human beings in a land area of 120,000 square kilometers with the city as the center.

In the southern part of this range, there is also a circle of influence of the Yangya tribe, and they and the tribes around them have been under the influence of the Gu State city-state for a long time, and in a few years they will become vassals of the Gu State.

On this day, Gu Guo walked into the shed as usual to teach arithmetic to the dozens of children who were admitted to junior high school, but he heard Pigskin anxiously shouting to himself outside.

"Ji Gugu, someone came back to tell us that there was a large group of people from the north!"

Pigskin didn't wait for Gu Guo to come out of the shed, he had already rushed to the shed first, and whispered to Gu Guo's ear under the children's face-to-face.

"The nephew of the man who came back in the birch bark boat went to school here, so he learned a little, but he couldn't count the number of the other party!"

"How many can he count?"

"A thousand!"

"A thousand?!"

Gu Guo was surprised, now besides himself, there is a team that can gather thousands of people? Could it be that the other party is also a traverser?

After explaining the day's study tasks, Gu Guo pulled the pigskin and walked briskly towards the place where the army was training.

"What do those people look like, and how far away are they from us?" Gu Guo asked as he walked.

"The hair is black and brown, and the men who went to the north to hunt hid in the reeds, and only fled south in the evening with birch bark boats, and when they came back this morning, they immediately reported to us."

Pigskin paused, calculated the distance of the crowd with what he had learned, and then said, "We will probably arrive tomorrow evening." ”

"You take a group of people out of the city and inform the tribes that everyone must evacuate to the city before dark!"

Realizing the seriousness of the situation, Pigskin immediately called the soldiers in his platoon and went out of the city to call for people.

And Gu Guo discussed with the remaining platoon commanders and squad leaders about the countermeasures to defend the city.

Raise soldiers for a thousand days, and use soldiers for a while.

At this time, a few thousand people can be gathered to go out, Gu Guo naturally does not feel that these people are forced to move south, and the only thing that can defeat the settlement of thousands of people in this era is natural disasters.

But even if they move south because of the disaster, when thousands of people see that the land can grow abundant food, and when they are faced with a local force equal to their own number, how can they not be greedy and occupy the magpie's nest?

It was impossible for Gu Guo to pin the fate of more than 2,000 people on the unknowable kindness of that group of people.