The farm's irrigation system is built under water and is a complete pipe network system.

When helping Jack repair the broken irrigation system, Chu Tianjiang found that this pipe network was not an irrigation system at all, at least not at the beginning, it was more like a camouflage system, that is, it was used to change the terrain and landform, but it was transformed into an irrigation system by Jack and them.

The most direct evidence of this is that the buried tube is not made of metal, but a very special carbon fiber.

Obviously, these networks were built by that civilization that has disappeared and have a lot to do with the ruins buried in the ground, and are part of the ruins.

In the afternoon, Jack took Chu Tianjiang to choose a place to build the farmhouse.

The place the figure spoke of was on the edge of the farm, next to the farm's fence, and the nearest farmhouse was dozens of meters away. Jack was surprised by Chu Tianjiang's choice, he obviously felt that this place was not safe enough, and thought that Chu Tianjiang should choose another location, but at Chu Tianjiang's insistence, he did not raise any objections. Although the farm is a large collective, Jack fully respects everyone's opinions.

On this day, Chu Tianjiang met more people, including the two people who arrested him that day.

The man's name is Schneider, the woman's name is Ava, the two are a couple, and Ava is the most beautiful woman Chu Tianjiang has seen since he came to this world, a mature woman, about twenty-five years old, with a good figure, and looks very combative.

Of course, Chu Tianjiang would not think anything wrong about her.

After Jack's introduction, Chu Tianjiang learned that there was a ten-member guard on the farm, and Schneider and Ava were members of the guard. They don't work and their main duty is to keep order on the farm, a bit like the police in the past, and to protect everyone from anyone else. In addition, they are responsible for setting up temporary stops on the roads leading to other farms and cities, so that those who leave the farms have a place to stay at night.

It's just that none of them are mutants and don't have superpowers.

Compared to the others, Schneider and Ava are just more powerful, and they have a complete set of armor, even when fighting the Daredevil. According to Jack, they were favored by God, blessed and were the guardians of the common people.

Through these, Chu Tianjiang felt that the guards were actually the police and militia, and they belonged to the lowest level of armed force.

During dinner, Chu Tianjiang asked Jack some questions and clarified some things.

That is, if the farm is well developed, it can become a township or even a city after the scale is expanded, and the key is the number of people. According to Jack, as long as the population increases to 5,000, you can apply to establish a town, and then the church will build a church here, and the empire will send holy warriors to guard the town. If the population reaches 50,000, the city can be founded, the church will be expanded in size, and at least one saint will be stationed, and the city guard will be more than 500 holy warriors, and it will become the center of the area. Although Jack didn't say it, one thing is for sure, he was the founder, and therefore he was the biggest beneficiary.

Obviously, this also explains why Lucia asked Sophia to go to Chu Tianjiang.

On the other hand, this is all the more illustrative of the fact that this is a sparsely populated world, and perhaps the population of the Old World is less than 100 million.

In a sense, the number of people determines everything.

It's just that Chu Tianjiang immediately thought of a very practical question, that is, in the past 10,000 years, has the total human population been very low?

Before the Epoch of Calamity, it took only 5,000 years for the total human population to increase from less than 10 million to nearly 20 billion, and even more than 20 billion at its peak. As intelligent creatures, and with the tools in hand, human beings have a very strong ability to reproduce. In a generation of 20 years, it only takes a maximum of three generations to double the population. If there were no external factors and restrictions, the total human population would certainly exceed 10 billion in the past 10,000 years. Even if wars between humans lead to a decrease in the population, it only takes a brief period of peace for the population to recover. In other words, the main reason for the sparse population is not that people have no desire to have children, but that they are affected and restricted by external factors, so that the total human population cannot grow.

This external factor is obviously related to the Daredevil.

Moreover, the Church, with the Holy Empire, must have tried to limit population growth in other ways.

All in all, the invaders didn't want too many people on the planet, let alone an explosion in the human population.

This night, Sophia did not come to harass Chu Tianjiang, so Chu Tianjiang slept peacefully.

Chu Tianjiang had a dream, dreaming of the past that he had been reluctant to think about, dreaming of those people he cherished the most, but no longer existed.

For Chu Tianjiang, who lives in this cruel reality world, this is a very cruel dream.

When he woke up, it was already dark.

Everyone on the farm was busy, even Lucia, who didn't usually participate in the work. Before the winter arrives, all the crops that have already matured need to be harvested, the fruit of the "bread tree" needs to be processed into flour, and enough fodder needs to be stockpiled to allow the livestock that have not yet grown to survive the harsh winter. In addition, it is necessary to slaughter the grown livestock and make enough meat products to pay a "tribute" to the church at the beginning of spring. In addition, before the harsh winter arrives, all the equipment on the farm must be inspected and repaired to ensure that it does not break down as much as possible during the cold winter. It's the busiest time of the year, and even the children have to work.

According to Jack, in the winter, no one wants to work outside, even during the day. Even wearing clothes made of animal skins, the cold can freeze a person to death in a matter of minutes, and at night, it can freeze a person into a popsicle in a minute. When winter arrives, most people stay at home, and even when they do, they only move around the neighborhood and never go far, making sure to get back to the farmhouse before they freeze.

Of course, there is still a lot of preparation to be done to survive the harsh winter.

For example, you need to collect wood for heating. Because the farmhouse is under the ground most of the time in winter, it is necessary to burn some charcoal, refine the animal fat used in the oil lamps, and so on. In addition, after harvesting, the cultivated land is leveled so that it can be replanted in the following spring. You have to prepare the seeds, and keep enough seeds, otherwise you'll have to pay to buy them from the caravan.

All in all, no one will be able to be idle for the next month.

Because Chu Tianjiang had already proposed that he didn't want to add to Jack's burden and move out of the city before the harsh winter came, Jack only let him participate in collective labor in the morning, and the afternoon time was at his disposal, mainly to build the farmhouse of his own.

Time passed day by day, and Chu Tianjiang did not have any free time.

Although Lucia took good care of him, Chu Tianjiang didn't want to owe the family too much favor, after all, after the harsh winter passed, he would leave here. During the day, Chu Tianjiang did his best to participate in collective labor and build farmhouses for himself. At night, he had to prepare for the harsh winter, mainly by sewing warm clothes from his fur, making some necessary household utensils, and observing the night demons that haunted the night.

Ten days later, Chu Tianjiang moved out of Jack's house and moved into his own home.

A cellar with an area of less than ten square meters, which is only enough for one person. Although it was very simple, Chu Tianjiang was generally satisfied.

On this day, the farm ushered in the first snow of the year. As with the customs of the past, spring is the beginning of the year, while winter is the end of the year. It's just that in this world, spring and autumn are extremely short, less than a month, and then there are seven months of summer, and two to three months of winter. Because the moon has collapsed, the months are not very accurate, roughly every thirty days a month.

After nightfall, Chu Tianjiang found the entrance to the underground ruins under the prompting of the figure.

There was a five-centimeter-thick steel door at the exit of the cellar, and the vents were located in the irrigation pipe network, and the ground had been leveled, so as long as Chu Tianjiang didn't make too much noise, he wouldn't be discovered by the night demons. What's more, absolutely no one came to disturb him at night.

The entrance to the ruins is a vertical duct, somewhat like a ventilation duct. It was buried about 20 meters below the ground, and there were no hydraulic facilities in the vicinity that could be used to build a farmhouse, so it was not discovered by anyone else. The pipeline is not very big, just enough for Chu Tianjiang to drill into.

After summoning the Colorful Battle Armor, Chu Tianjiang entered the pipeline.

After descending about a hundred meters, we came to the first fork. The figure had already explored the underground ruins and displayed a diagram of the structure of the pipe network system on the screen of the Rainbow Warframe, marking a route forward. Along this route, Chu Tianjiang passed through four forks before coming to a larger room.

It is a hemispherical room with a floor area of more than fifty square meters. The floor and walls are made of metal, and there is a table made of metal, and a chair made of metal. According to the information displayed on the screen, this is a very special alloy containing a metal that does not exist in the periodic table. The strength of the alloy is so high that it surpasses that of the best steels, so it can be concluded that the people who made the metals, or the people who built the ruins, had more advanced technology than humans had before the cataclysm.

This is a civilization with a high level of science and technology!

After passing through this room, there is a spacious underground passage.

The deeper he went, the more Chu Tianjiang believed that human beings had never given up in the past 10,000 years, had been fighting, and perhaps had not given up until now.

If humanity is still fighting, there must be resistance!