Lame's eyes were shining brightly as he kept circling around the wooden ladder made by Han Cheng.

While turning in circles, he would touch the wooden ladder from time to time, and sometimes he would hold one end of the ladder, lift it up, and shake it vigorously.

The wooden ladder was still solid, without any sign of looseness.

The more this happened, the brighter Lame's eyes became, because he had discovered a completely new direction!

In the past, if he wanted to connect two things together, the only way he knew was to tie them up with a rope, or to use a vine that could be used as a rope.

But now, the Son of God has actually made an extremely strong wooden ladder that can be connected without ropes!

For Lame, who is obsessed with all kinds of handicrafts, this is no less than the night after he became an adult when the door to a new world opened up!

"Son of God!"

The more he thought about it, the more excited Bo became. He let go of the wooden ladder, saluted Han Cheng, and shouted respectfully.

This is the Qingque tribe's way of expressing respect for Han Cheng. Even a highly respected witch rarely receives such courtesy.

The witch was also looking at the wooden ladder. In his opinion, the wooden ladder made by the Son of God was indeed more exquisite and better than the ones tied with ropes, but not so good that it would make people ecstatic.

It's right that lame shouldn't be so excited.

This is the cognitive bias caused by different occupations.

Just like the pottery plate that Wu was so happy about, which was used to carve words, in Bo's eyes, it was actually just that...

With Bo, an avid handicraft enthusiast, around, Han Cheng basically did not interfere with the rest of the wooden ladder manufacturing and let Bo do it.

He would only give guidance if there were some things I didn't understand.

It is worth mentioning that Han Cheng has already taken out the ruler.

Because as more and more things are manufactured, the production of various objects must also meet certain standards. In this way, the manufactured things are more beautiful. Another thing is that if they are all made according to certain standards, damaged parts on the objects can be easily replaced, and there will not be a situation where one part of the object is broken and the entire object has to be scrapped.

Of course, another reason is that Han Cheng wants a relatively accurate measuring tool.

This ruler is easy to make. You just need to find some straight wooden strips, peel off the outer skin, and leave only the white inner bones.

First estimate the length of ten centimeters, and then use this ten centimeters as the standard to gradually extend out a ruler of one meter, one and a half meters or even two and a half meters.

Then, evenly carve out scales from zero to ten within this standard ten centimeters and mark them with numbers. After carving, put a little charcoal foam on your hands and rub your hands on these scales. The scales that were not very obvious originally will immediately become clear.

Similarly, using this ten-centimeter stick as the standard for comparison, the scales on several other sticks of different lengths are accurate to the centimeter, and in the middle of each centimeter, a small vertical bar is engraved, which is a half-centimeter mark.

For the current Qingque tribe, accuracy to the centimeter is sufficient.

Of course, the distance of ten centimeters estimated by Han Cheng will be more or less different from the ten centimeters in later generations, but there is no need to worry. As long as he can continue this standard and ensure that the rulers produced later are the same length as the original ten centimeters, then his standard will be accurate.

Therefore, Han Cheng took great care to preserve the original ten-centimeter piece of wood.

After communicating with the witch for a while and explaining the importance of this thing, the witch, who seemed to understand it, placed it on the stone slab in front of the totem pole, along with the feather crown and bone staff. That is the most sacred place in the entire Qingque tribe, and also the safest place.

The witch did not fully understand what the Son of God said. He didn't know why this ordinary piece of wooden stick suddenly became so important.

But since the Son of God said it so solemnly, it must be correct.

The making of rulers is a delicate job and cannot be sloppy at all. In order to make these things well, Han Cheng worked on them for seven or eight days before completing them.

However, a ruler made of a wooden stick also has its shortcomings, that is, it is not long enough. It is okay to measure shorter objects, but once it is too long, it becomes extremely inconvenient to use.

Thus, the tape measure came into being.

The material of the tape measure is very simple, it is just a twisted rope.

Han Cheng cut two ropes, one was ten meters long and the other was five meters long, both of which were measured using the previous standard ruler.

Then start from the beginning, tie a small knot here every ten centimeters with a single piece of rope grass, and tie a big knot at one meter with a thin rope made of two pieces of rope grass. This perfectly solves the problem of leaving scales on the rope.

These two 'tape measures' are basically used to measure large distances such as the 'foundation' of the courtyard wall, the gaps between beams, etc. They don't need to be too accurate, and a scale of ten centimeters is enough.

The manufactured 'tape measure' is wrapped around short wooden sticks, pulled out when in use, and wrapped around again when not in use.

In order to popularize the concept of ruler to people in the tribe and teach them how to use it, Han Cheng put in a lot of effort and spent a lot of time talking before they gradually accepted and understood what a ruler is and learned how to use it.

When it comes to understanding and using a ruler, the one who learns the fastest is not Shi Tou, who has a great talent for Chinese and Chinese characters, but Bo.

This may be related to the fact that he has been engaged in weaving a series of things such as fish cages, rafts, and fences in the past year or so.

Because these things have to be made to a certain size, and he has been exposed to them more, he naturally understands and uses them faster than ordinary people.

The second is Heiwa, the best pottery maker in Qingque tribe, and then Shitou.

Among these people in the tribe, the one Han Cheng admired most was Lame.

Because he had injured his leg before and had experienced the sadness of being a burden, when Han Cheng appeared and brought him some hope, he desperately held on to it and refused to let go.

Just like that, after more than a year, when he looked back, he was surprised to find that he already had so much! And many of them were far beyond the average person.

Lame held a piece of charcoal in one hand and a one-meter-long ruler in the other. He was drawing on a wooden pillar placed flat on the ground, mumbling something in a low voice. After drawing for a while, he made some marks on the wooden pillar with the charcoal.

It looks a bit like carpentry from later times.

He was looking for the point where the mortise was needed.

If you want to make a wooden ladder, the mortise and tenon holes on the two sides of the ladder for the horizontal bar must be aligned, otherwise, when the time comes, the horizontal bar will either not fit in, or will be loose...

He was absorbed in his work and didn't notice the look of approval in Han Cheng's eyes who was standing beside him.

(Good news! Good news! I received the news that I will be at Sanjiang this Sunday afternoon at 2 o'clock. I have finally received the recommendation I have been looking forward to for so long. I am so excited!

Thank you all for your support, book friends. Thank you. I am also very grateful to my editor for giving me such an important promotion position for such a niche book. Thank you.

Tomorrow the old book will be finished, so I can concentrate on writing a new one. From the day after tomorrow I will update twice a day, and save some manuscripts for the release. After the release, the update will not be so sluggish, and there will be bursts from time to time.

Then... I still want to ask for votes. Comrades, if you have any, please feel free to give them to me! I'm not afraid of the pain.

Finally, such a happy event must be updated! Three updates tonight to celebrate. Thank you for your love.)