"Sir, forgot to ask, what's your name?"

Chen Ning scribbled a few pieces of paper to the full extent and handed them to the old man.

The old man set up his glasses, took Chen Ning's drawings and studied them carefully, with a gentle smile on the corner of his mouth.

"Chengdong."

Chen Ning patted his head, and he remembered why he felt familiar when he first saw him, this was his sixth-generation ancestor! When I was young, I worshiped my ancestors, and I could always see his statue.

I had heard the older generation say that his ability had reached A-level, but they didn't know that he was once the guardian of Tongbei!

Chen Ning's mood is a little complicated, in the future, he will definitely lead the Qinghua people to come over and ask for a merger, if a war breaks out, wouldn't it be a big rebellion?

No, no, the mission is above all else!

Chen Ning's gaze gradually became firm, since the people close to the original owner of this body did not shake him, an ancestor who was separated by six generations should not let him waver!

At this time, Cheng Dong suddenly took the initiative to come over: "Look, this step, to this step, how to solve it?" ”

He couldn't fully understand the drawings written by Chen Ning.

"You can do this first, and then ...... like this" Chen Ning calmed down, said lightly, and took the pen in Cheng Dong's hand to calculate for him.

Before the end of the world, Cheng Dong was already a doctor in a big hospital who had worked for many years, and he had a high level of education, Chen Ning gave him an explanation, and he could roughly understand it.

It took a night for Cheng Dong to finally understand the drawings drawn by Chen Ning.

Tongbei also has a R&D department, but the level of researchers is definitely lower than Chen Ning, and Cheng Dong has to attach notes to hand over the drawings, so that the new technology can be quickly mastered by everyone and put into production and application.

............

After resting for a few days and feeling that the injury was fine, Chen Ning went to the street, and he did not forget that he had thought about doing a large-scale research along the way before setting off.

As a medium-sized human gathering place, Tongbei is absolutely crushing Qinghua in terms of population first, and the population density is much higher than that of Qinghua in a larger area.

Its market is extremely prosperous, with hospitals, courts, police stations and other institutions, and it has basically returned to the pre-apocalyptic social state.

Although in Chen Ning's eyes, the system of this gathering place is far from being advanced and efficient, the government agencies cannot achieve strong control over the entire gathering place, and the science and technology are also very backward, probably only at the level of seventy or eighty years ago, but to this extent in this chaotic era, it can already be seen that Cheng Dong's painstaking efforts can be seen.

Maybe Qinghua is not as good as it now, but it's just because the foundation is too poor, and it will become stronger one day!

In the second week of Tongbei, Chen Ning had basically explored the distribution of every street and building in the entire gathering place, and the injuries on his waist and abdomen had also recovered, so he had the intention of going.

Recently, the old man Chengdong was busy in the dark to put the human body mechanical technology given by Chen Ning into application, and when he heard Chen Ning's resignation, he simply expressed his retention, and saw that he insisted on not staying.

After being gifted out of Tongbei, Chen Ning continued to walk south. After experiencing the crisis in the wilderness, he was always worried along the way, and he always turned a blind eye when he slept at night, and his mental state was very poor.

On the way, he passed through two large gathering places and three medium-sized gathering places, but unfortunately Chen Ning was not lucky enough to meet the old man at that time, and he was all turned away.

Maybe this also has something to do with Chen Ning not exposing the unicorn arm.

Chen Ning clearly knew that not many people could resist the greed for high technology, and there were only a few people like the old man in the last days, and if others picked up Chen Ning at that time, they would definitely force him to hand over the laboratory.

He didn't want to get into trouble anymore.

He was of little use to the gathering place, and was even a wanderer, and of course no one wanted to accept him.

He can't get supplies along the way, and the ammunition energy he carries is limited, so he can't do it if he can, and of course, the mental head that has become bad because he is in a hurry, hiding from xenos, and not being able to rest does not allow him to do it casually.

On the way, he ran into a few B-level and B+-level xenomorphs, and even once bumped into two A-class xenomorphs fighting, Chen Ning avoided them and did not dare to be involved with them at all, although he knew that some xenos had materials that were of great use to him.

After eight or nine days of traveling, Chen Ning finally came to the destination of this trip-Gaopan, but what was annoying was that there was a human gathering place of unknown scale on the site of that biological laboratory at this time!

This is not recorded in later historical sources, and it seems that this gathering place must have been destroyed for various reasons before it had time to communicate with the outside world.

But the future is the future, the present is the present, and the experience of this journey has made Chen Ning know that there is no gathering place that will accept a wanderer at will.

Not every leader in the gathering place is as conscientious as Chen Ning's ancestor Chengdong, who is compassionate and compassionate, and does not oppress the weak.

More of them have to belong to Yunhe's part, selfish, gathering the strength of everyone to serve themselves, taking stability as the first priority, rejecting external variables, refusing progress, and refusing development.

On the periphery of the Gaopan gathering place that Chen Ning arrived at during the day, its defense had its own characteristics like the arrow towers in Qinghua and the low city wall in the north.

The area where it is located was called Western Fujian before the end of the world, and it was inhabited by the Hakka people who lived in the tulou, so this entire gathering place was also built into a huge tulou according to the customs of the Hakka people, and the area it enclosed may be enough to be the size of a small town.

The outer ring of the tulou is round, the floor is extremely high, the outer wall is also thick, there are four arrow towers in the four directions of east and west, north and south, all closed, inside and outside are not passable.

The stakes are serious, Chen Ning doesn't intend to ask them to let him into it, if he is refused, it will attract attention, and it is even more inconvenient for him to find the communication between this tulou and the outside world, and sneak in on his own.

When night fell, the arrow tower next to the tulou was lit with lights, and the shadows of several people could be seen in the distance under the firelight.

Chen Ning waited patiently until now, and finally got the opportunity, and slowly approached the tulou in the dark.

But when he approached, the people on the arrow tower suddenly sacrificed a big weapon of murder - a searchlight.

The searchlight was very bright, and no matter where the people on the arrow tower hit it, they could see the entire area around it clearly.

It turned out that Chen Ning was still wondering how such a gathering place that did not pay attention to the night enemy alarm survived until now, and the emotional family had a secret weapon.

There are only four arrow towers, and it is not difficult to find a large team of people in this density of exploration, but Chen Ning has light hands and feet, and he drilled the gap between the searchlights and the time difference, and advanced with the power unit, so he easily dodged the searchlights and approached the root of the wall.

After carefully touching the root of the wall and walking around, Chen Ning found that this earthen building was really surrounded by one and could not enter or exit.

The people inside always have to eat, drink, and produce garbage, so what to do with the filth? It can't all be placed in the gathering place.

The tulou occupies a wide area, and the sky is almost dawn after walking around it, Chen Ning is a little difficult, and it can be inferred that the tulou must have left a mouth somewhere so that the garbage that cannot be processed in the gathering place can be discharged, but does he still have time to find it?

He leaned against the wall of the tulou and stroked his hand lightly on it. It had been a long time since the searchlights had hit, and the walls of the tulou were a little bumpy.

Well?

Chen Ning thought of a solution.