"First shovel the ground and widen it, then smash the ground firmly, and then lay a layer of gravel on it, and then lay a layer of sand and gravel on it. The roads behind it are according to this standard."

After Chenbei supervised the prisoners for two days of construction, he handed over the matter to the totem warriors to supervise, because this is not a complicated matter, and just need to implement every step in place.

As for himself, he put his mind on the wooden wheelbarrow again.

Chen Bei came to the carpenter's workshop, found the carpenter's "root", and drew his ideas on the animal skin.

"This is a wooden wheel. The difficult part is to make this wooden wheel, and the bearing, where the wheel and this stick are connected."

Chen Bei pointed to the wooden wheel on the animal skin roll and said, "First of all, this wooden wheel must be made round enough, and the two wheels must be consistent, otherwise it will be uneven when it rotates."

"I thought so."

Chenbei found a rope and two sticks, tied the rope to one of the sticks, and tied it loosely to ensure that the rope would not be entangled when it was turned, and then inserted the stick into the soil.

The other stick is straightened by the rope and then circles around the stick in the middle.

Soon, a shallow circle appeared on the ground.

Gen and his apprentices were stunned. They had never thought that they could draw circles in this way.

They used to make round things, but they rely more on their feelings and eyesight.

"The leader is so amazing. Why didn't I expect such a simple method?"

"Yes, the leader can always make a lot of useful things."

...

When the people in the carpenter's workshop looked at Chen Bei, their eyes were full of admiration. In their eyes, Chen Bei was simply omnipotent and omniscient.

Chen Bei said to the Gen again: "We can find solid wood, make a wooden board, and then use this method to draw a circle on the wooden board and then dig the space that needs to be dug, and we can get the simplest wooden wheel."

Gen nodded seriously and said, "Chief, I understand. I must make two wooden wheels of the same size."

Chen Bei was not too ambitious and expected the carpenter to make exquisite wheels. He only had one requirement, which was simplicity and practicality. As for all aspects of performance, if you do more in the future, you will gradually improve it.

"The next one is this bearing."

Chen Bei has been thinking about how to make this wooden bearing for several days. At first, he just wanted to just put a solid wooden stick on the wheel.

But in that case, the friction will inevitably be very large, and if it is slightly heavier, it will wear out quickly and it will be scrapped in no time.

Later, after his hard thinking, he finally came up with a solution, which was to make two simple versions of ball bearings.

"This bearing is a little more complicated, so try it as much as possible."

Chen Bei pointed to the decomposition diagram on the animal skin roll and said, "Simply put, we can make two rings bigger and thicker, but like the wheels, it must be very round."

"Put these two rings together, put wooden beads in the middle, and apply oil to make sure they are lubricated, and on both sides of the ring, use two boards, clamp them in the middle to make sure the beads don't fall out."

This thing is simple and simple. The complexity lies in its accuracy. For primitive tribes with backward tools, it is actually a bit difficult to make this thing.

There is no way, Chenbei can only settle for the second best. Since it cannot be made fine or small, then it should be made thick and bigger. If it is a little rough, it is acceptable.

If you use wood to make small rolling bearings, you may explode as soon as you press them.

But what if it is made bigger? The wooden beads are so big that the fist is and the ring is dozens of centimeters thick, will it still be easily crushed and exploded?

Gen grabbed his messy hair. Obviously, the things Chenbei asked to make were too difficult.

The apprentices also felt a little confused. The wooden wheel was easy to understand, but this rolling bearing was really beyond their knowledge.

Chen Bei saw their embarrassment and said, "Don't worry, I will study it with you this time and create it together. The best I can do. If I can't do it, it won't be blamed."

Hearing this sentence, Gen and his disciples were relieved. Since the leader also did it together, there was nothing to be afraid of.

In the next half month, Chenbei spent most of his time in the carpenter's workshop, using very simple and primitive tools to build the first wooden wheel truck of the Mang tribe.

The first thing I did was the carriage of a wooden wheel. This thing was not difficult. It was built in a few days, just like a baffle.

Then there is the bearing. Only when the bearing is made can the wooden wheel be made according to the size of the bearing.

During this period, people in the tribe often saw Chen Bei thinking hard and walking around irritably.

It is really difficult to process extremely simple tools but more complicated things.

For example, in order to drill holes, Chen Bei had to work hard to create an ancient hand-made drill.

In order to make the wood beads round, he tried his best to get a simple set of car-bamboo equipment.

The carpenters were very happy because Chenbei created one tool after another, which they could use in the future.

Chen Bei's image in their hearts is getting taller and taller, and it is not an exaggeration to call him a god.

...

In this way, he had been struggling for a month, and Chenbei's hair was almost pulled out. Finally, the first wooden wheelbarrow of the Mang tribe was built.

Although the parts are rough and the entire wooden wheelbarrow looks very ugly to Chenbei, it means that the Mang tribe has bid farewell to the era when it is entirely carried by shoulders.

"Chief, give it a try."

The carpenter took his apprentices and excitedly pulled the wooden wheelbarrow to the newly built road of the tribe.

People from the tribe came out to watch. There was no entertainment in the tribe, so there was rare new things to appear, so everyone naturally wanted to join in the fun.

Chenbei asked Lao Lu to lead a relatively docile bison and let the bison pull a cart.

A boomerang-shaped wooden stick was placed on the shoulder of the bison, which was connected to the lasso and tied to the two front beams of the two-wheeler.

The bison was obviously very uncomfortable and walked around in anger.

The old deer pulled the reins of the cow and walked forward, and the bison with its nose strangled could only walk forward obediently.

The bison drove the wooden wheel forward, and the wheels on the wooden wheels turned and drove fairly smoothly on the flat road.

"We've done it!"

The carpenter and the apprentices cheered one after another. They spent countless efforts on this wooden wheelbarrow, and dreamed of making wooden wheelbarrows at night.

Chen Bei was also a little excited, but he was the leader, so he naturally could not act too unsteady, but the joy on his face was not concealed at all.

Chenbeidao: "Put some heavy objects on the car."

The old deer pulled the bison to the side of the road, and the totem soldiers who were watching the fun loaded a lot of stones on the wooden wheelbarrow.

The old deer led the bison forward again, and the wooden wheelbarrow was still driving smoothly, and the bison didn't look difficult.

"Huh, it's a bit ugly, it's not bad to use."

Chen Bei finally breathed a sigh of relief. After struggling for so long, he finally didn't waste his time.

Chen Bei said to the carpenter: "The wooden wheelbarrow has been successfully made. The carpenter's workshop will reward each person with thirty kilograms of animal meat and fifty kilograms of fish!"

"Thank you, the leader!"

The carpenter and his apprentices were so excited that they almost jumped up, and the tribes liked this kind of real reward.
Chapter completed!