The wall had to be built, but now in autumn, it is the season of abundant food, and it is necessary to ensure that enough food is stored to free up manpower for the construction of the wall.

Wang Tian chewed half of a grilled fish without any seasoning in his mouth, and calculated it while eating.

The smell of fishy in his mouth was not disgusted, and his experience of growing up in an orphanage made him understand the preciousness of drinking and eating, not to mention the food of ancient times when even slash-and-burn farming had not yet begun.

This kind of food is much better than the food I said I had eaten in the wilderness survival training when I was a scout in the army.

As for how to build the wall, Wang Tian's first thought was to build the city with trees.

Large trees with a diameter of more than 50 centimeters are scattered all over the mountains, so get them back and "plant" them on the ground, relative to the length of the 70-meter wall, the speed should not be too fast. The length of 70 meters is about 150 pieces of wood.

There is no shortage of materials, but you can't see it, imagine how long it will take to cut down such a stout tree with a primitive stone axe?

Get some small trees and shrubs, make a fence wall, and use a stone axe to do it. Can do this out for the fence bird with no. It turned out to be so, so I had to give up.

The other is to build it with stones, so that the wall is strong and impact-resistant, and it is not afraid of wind and rain. Stone is easy to find, but in this era, without cement as a binder, this method will not work.

Then there are the mud-tamped walls that are used to make pigsties in the countryside. Although it is not waterproof, but as long as you build a thatched roof, you can solve this problem, the shortcomings are also obvious, the giant beasts of this era do not know how much, to make it strong, the thickness of the wall should at least reach more than 70 cm, the process of ramming the wall, but it is a laborious and laborious work. But this is the only feasible way to build a wall at this stage.

Wang Tianhou studied mechatronics at university, an ordinary second-rate university, with a good major and an average school.

For a child who grew up in an orphanage, it is not easy to get into college. In the internship stage when he was about to graduate, he did not contact the internship unit, but when the army came to the school to recruit new recruits, he signed up to join the army. became a glorious soldier of the people.

Wang Tian did not join the army to gild, the orphanage experience has regrets, but more gratitude, he wants to give back to the society in this way, thank the society for raising him. Originally, with his academic qualifications, he did not need to go to the grassroots army and behave properly, but he adhered to the original intention of coming to the army to train and endure hardships, and did not take this road. If you go to military school again, then you have to let the state raise you for a few years?

Well, mechatronics, in this era when there is no electricity, is considered to be in vain. But with the experience of being a soldier, it is more than enough to build a wall, and this experience can also allow you to lead your ancestors to live a better life in this ancient era.

If you want to build the wall, you must first solve the problem of food, dig pits and set traps, and catch game. These are the basic survival skills of a scout, and I think he ate everything during the 20-day wilderness survival challenge training in the primitive forest on the Yunnan-Burma border.

Yes, that's right, anything that can be obtained and can be put in his mouth, Wang Tiantong has eaten everything. Of course, if you throw him in the forest of this primitive age, you won't survive for one night.

After being able to communicate with each other, hunting is something that can be done now, but it is not too late to teach.

After Wang Tian ate the last bite of wild fruit, he came to Wu and told him that he would also go fishing in the afternoon, Wu nodded and agreed, and the women in the tribe were picking wild fruits nearby, and there should be no problem with safety.

Wang Tian followed the five women in the morning to the stream under the cliff, and Wu also followed. He didn't come to fish, he wanted to see how Wang Tian fished.

The status of the witch does not need to go out to work, only to dance and worship the gods, and the rest of the time he writes and paints on a stone tablet. Yesterday he carved a few stone tablets, which is estimated to be a record of Wang Tian's arrival.

The pure natural and pollution-free primitive environment, the water is clear and there are many fish, there are really a lot, one by one, one by one.

So many fish, five people in one morning to get two?

Wang Tian understood after watching the women's operations.

Although there are many schools of fish, they scatter as soon as people get close, and it is impossible to catch fish by chasing them. You must stand motionless in the middle of the water and wait for the frightened fish to swim over without feeling in danger before you can start spearing. And because of the refraction effect of the water, you don't see the real position of the fish, and the fish is extremely flexible in the water, so this fishing method is purely based on luck.

Wang Tian took a wooden thorn, stood in the water and held his breath to concentrate, calculated the angle, and thrust a stick into it, winning the first battle. Holding the stick tightly, he picked up a stone from the river, knocked the fish unconscious, and threw it on the shore. Wu and a group of children had shocked expressions on their faces.

Next, Wang Tian inserted three more sticks, three times and two hits, everyone saw that his face had changed from surprise to worship, but Wang Tian shook his head, the stream was already cold in this season, standing still for a long time and bending over, at this moment his hands were sore, Wang Tian inserted a few more times, and found nothing.

His body was no longer strong enough to support him to continue working.

Wang Tian walked ashore, pointed to the cave of the witch finger, and then climbed the gentle slope and walked towards the cave.

Wu looked dazed, this fork is so good, why don't you do it? You know, even if all the women in the tribe come to spear fish, they can't get much in a day, and Wang Tian forked four times and got three fish, which is not satisfied?

Either the brother doesn't make a move, or if he does, he will definitely cry ghosts and gods. Wang Tian muttered in his heart, with this amount of water and fish, it is completely possible to kill everything, and even serve him the fish nest. Why bother with such a lot of effort, you can just practice your hands.

In fact, Wang Tian found that the widest part of this creek is only about 3 meters, and the amount of water is not very large, and there is also a drop between the upstream and downstream. You only need to find a narrow place on the surface of the water, block one end, and drain the water at the other end. Otherwise, you can't show your means.

In fact, the brain capacity of primitive people is basically no different from that of modern people, and the reason why Wang Tian can think of it but primitive people do not do it is only because of the long evolution process of human beings, because of the existence of inertial thinking, human beings have never thought about it. If you are not afraid of hooligans and uneducated, you are afraid of educated hooligans. Once human beings begin to think, the dawn of ancient civilization has already begun to come!