Zhou Ran made a 2.0 version of the trolley, and in general, he replaced the wheels needed for the trolley with a device similar to a track.

The most important of these is that the weight is increased, and it is not so cumbersome to push.

At the same time, an additional device was attached to the front, and if there were livestock, the reins could be tied to the animal and they would be responsible for pulling the cart.

And the tracks are a little better than the wheels, because they are extremely resistant to muddy ground, and it is not difficult to make this 2.0 version of the trolley.

The main body and most of the structure are all made of wood, and Zhou Ran skillfully uses the structure of the mortise and tenon, which is simply a wooden version of the building block, which does not need nails and can also make the wood fixed very firmly.

One of the main basic principles of the mechanism used by the Mo family is the tenon, Zhou Ran is also a reborn no matter how he says it, and he is also the kind of reborn who has a very wide range of applications, and it is naturally normal to know a little bit of this kind of widely used thing.

The part of the track is a little more troublesome, and metal is used in it, but fortunately, they still have a large number of captives to use, and these primitive people of the Tianxuan tribe have not been ordered by Zhou Ran to solve all of them, in order to let them do these jobs.

Zhou Ran has also discovered that with the increase in the number of people in his tribe, it is a bit unrealistic to just count on the bonfire to increase the number of people.

People who are not summoned by the campfire have too low initial friendship and the possibility of a large decrease in friendship, so they cannot be used as subjects.

For example, those more important tasks they can't do, such as fetching water, don't underestimate the task of fetching water, after all, water and food are things that the people must come into contact with every day, and they have to enter the mouth.

In case a traitor with a low opinion is poisoned inside, it will really directly wipe out the soldiers in Zhou Ran's territory!

But like the assembly line, there is no problem, the tasks that everyone on the assembly line needs to bear are very easy, and they are all mechanized, as long as you can swing a hammer, it will be over.

Zhou Ran roughly calculated that there were still more than 700 primitive people of the Tianxuan tribe scattered around.

Of these more than 700 primitives, he plans to bring back all the people who have no combat effectiveness, so let them cooperate now and see if they can apply the tasks of the assembly line.

When Zhou Ran taught these primitive people to carry out assembly line tasks, Akaka took those fish people and climbed to the top of the wall, and when they saw the strange appearance of those fish people, most of the primitive people were directly stunned.

Zhou Ran didn't care, he spent about three or four hours teaching these primitive people the tasks they were responsible for, and then began to work on the assembly line.

Yan Feishuang and several other totem warriors with relatively strong combat effectiveness tied up the warriors of the Tianxuan tribe, as well as the generals and chiefs, and threw them into the big pit that had been dug out temporarily.

The surface of this large pit is very smooth, with a depth of nearly 5 meters, without any force point, and at the same time, their hands and feet are still tied, and it is basically impossible to escape if they throw them inside.

The rest of the primitive people who had no combat power began to be responsible for carrying and forging.

The production speed of the assembly line was very slow at the beginning, and it took nearly ten hours to successfully produce a track, and there were many flaws on it, but Zhou Ran didn't care, it was really normal.

He just beckoned the primitive people to continue their work, and told the totemic warriors to start preparing the food.

Zhou Ran didn't plan to return immediately, so many supplies, if he only brought back some of them, it would be too wasteful.

Take this opportunity to let these primitive people adapt to the task of the assembly line, and at the same time forge some more tracked vehicles, and by the way, let some fishmen go around to hunt livestock, and then let them be responsible for pulling the carts, killing three birds with one stone, that is, wasting half a month's time.

However, it really didn't take that long, that is, three or two days, and Zhou Ran successfully obtained a qualified crawler from the assembly line.

And this success rate, which has been rising over time, has finally stabilized, and basically can get about 5 tracks a day.

A week had passed, and the hominids had made twenty tracked carts.

The weight of each tracked trolley is more than 6 times that of the previous regular version of the trolley.

Of course, the number of people required has naturally increased, and each tracked cart needs at least three primitives with a strength attribute of more than 20 points to push together to achieve a speed similar to that of the previous small cart.

Zhou Ran looked at these primitive people, and the assembly line production was very good, which made him really moved.

And after this period of time, these primitive people found Zhou Ran and the others, and they didn't do anything to them.

Just let them do some work every day, and give them food normally, most primitive people's vigilance and resentment towards Zhou Ran have obviously weakened a lot.

This is normal, to put it a little better, that is, these primitive people have relatively big hearts and can't remember so many things.

And the bad part is that their brain capacity is too small to think about such complex things.

In their opinion, as long as they don't use themselves as cannon fodder, can eat good food every day, and ensure that they don't starve to death, they are basically a qualified lord.

And if you can eat well, or even eat well, it is simply a rare good lord.

There was no shortage of food in Zhou Ran's current territory, so with a wave of his hand, he took these more than 600 primitive people and began to return in the direction of his territory.

The reason why the number has been reduced from more than 700 to more than 600 is because Zhou Ran did not bring those primitive people with combat effectiveness.

The primitive people of the Tianxuan tribe have an average level of combat effectiveness, and they can't play a role if they bring them back.

On the contrary, because they have combat effectiveness, they are more likely to have the intention of resisting.

It would be fine if only a few of them resisted, but they themselves were from the same tribe as these ordinary primitives, and it was easy to have the same thoughts as these primitives, so they simply gave them up.

On the way back, most of the trolleys were tied to the reins of the animals and let them pull the carts, while the rest of the carts were carried out by these primitive people in turn.

Zhou Ran didn't leave them any of the resources in the Tianxuan tribe, and all the things that were turned out in the envoy tower were thrown on the car, and even the buildings of the entire tribe were destroyed by Zhou Ran in one go.