The protruding corners on both sides of the flat arm must be ground into a flat edge.

Then the gan flat can be bent like a completely flat piece of bamboo, and under the combined force of the fibers, there will be no fine seams.

This treatment, also known as edge thinning, is simply thinning.

Since the effect of scraping burrs with waste bamboo strips is very good, Ah He wanted to use the deburring method to use sharp waste bamboo pieces to scrape the triangular edge on the flat shoulder.

That is, waste bamboo chips are used as scrapers.

Since the two ends of the bamboo strips are smooth and safe, Ah Yu tied one end of the flat tan with rabbit skin, and saw the natural stone steps where she often came to bask in the sun a little farther away.

The shape of the stone steps of the Taihu Lake stone is a bit like a lotus, and it is not high, so I took this flat shoulder and went to the slope of the lotus platform.

Then she put one end of the flat pole on the ground, and the one with the rabbit skin on her chest.

Then he held the two ends of the thin bamboo strip used as a scraper in both hands, and put the quick mouth of the thin bamboo strip on the triangular side of the flat shoulder.

Between the two bamboo strips, a cross is formed.

Then, Ah Ah pinched the horizontal waste bamboo pieces with both hands, and scraped them up and down on the vertical bamboo pieces.

Her plan is still to deal with the two heads first, and then deal with the middle, paragraph by paragraph.

At this time, because it is necessary to scrape quickly, it is possible to scrape the bamboo edge, and because it has been seen that the elasticity of the bamboo bow is absolutely useful, Ah not only did not feel troublesome, but also because the bamboo bow can be formed quickly and very excited, so it scraped very quickly, and then it was not when the burr was removed before, in order to save effort, scrape slowly.

After a while, Zhang Jingtao was shocked.

Because, because the friction between the two pieces of bamboo is too fast, it is very easy to scorch.

Yes, scorched!

"Huh?" Ah He was surprised again, and then, those big eyes suddenly lit up.

It's so bright, it's so bright, it's as bright as two flames.

Zhang Jingtao's heart also beat faster, he never thought that the friction between the bamboos would be so easy to scorch.

Zhang Jingtao couldn't help but look at the pile of miscellaneous bamboos over there.

And Ah He, who is very familiar with the use of fire, undoubtedly thought of them, Gen Ben didn't need Zhang Jingtao to say anything, he had already put down his flat burden and went over there to find what she wanted.

It was some fine bamboo silk made when the bamboo was broken, and Ah also scraped a lot of bamboo chips with a stone knife.

Because the weather was already quite hot in early summer, and the bamboo silk was very dry, Ah Da didn't have to clean up to get what she wanted.

Moreover, she didn't let go of the two meters of waste flat tan, she fixed the bamboo silk and some rabbit fur together in the bamboo belly with the hole of the waste flat dan, so that these bamboo silk were facing the mouth.

Then, Ah He went to the stone platform again, picked up the flat pole, still between his chest and legs, and then held the waste flat pole with both hands, and quickly rubbed and scraped the piercing mouth of the piercing to the side of the flat pole.

After a while, the bamboo filaments that were held in place in the bamboo knots smoked.

And Ah, he knows what sheep gas is.

The little girl blew a breath.

This ** qi is like fairy qi.

Rumble!

A fire ignited!

Zhang Jingtao's heart also thundered.

Ah He held the bamboo knot in both hands, like a goddess, standing on the high place of the lotus platform stone platform, looking at the flames, for a long time, he raised his head, hooked the small corners of his mouth, and smiled happily: "Fu Xi, we have a fire!" ”

"Ahh Yes! Yes! Zhang Jingtao opened his mouth and shouted, to praise Ah Ah's power, but there were tears in his eyes, is there finally fire in human beings?

That night, Zhang Jingtao ate cooked potatoes and cooked fish.

Because in order to prepare for the use of fire, Ah Yu expanded the fire hole that Zhang Jingtao had dug before, and the hole where the fire was stored.

And in the Huocai Cave, Ah He had already saved a large amount of talent.

When Zhang Jingtao was lighting the fire, he saw that on the 'hole' in the fire cave, he was also pasted by his aunt a lot of 'Zhongni'.

That is, the inner wall of the fire cave is smeared with a lot of excavated soil to prevent carbon gas from penetrating through the gaps between the mountain walls.

And in such a fire cave, the entrance of the cave does not need to be too big, and the amount of sheep gas entering the cave can be controlled to ensure that the temperature of the fire cave is higher and more durable.

The cave next door to the fire cave is larger, and Ah He also sealed it with a bamboo curtain to prevent small animals from entering, and it contains all kinds of stones that increase the function of the fire pit, a large amount of bamboo and dry firewood.

This is to pass on the convenience of Caihe, and also to borrow the temperature of the fire cave, which can make it easier for the wood inside to dry.

For this reason, now that there is the fire bamboo method, the two people of the silk clan no longer have to worry about running out of fire.

In the south, there is bamboo everywhere, and it is too easy to get some bamboo.

And bamboo is so easy to scorch in friction, which Zhang Jingtao never thought of before.

If it is to drill wood for fire, it is really useless to drill the dead, and it is impossible for a wild man to do that.

But this bamboo has only been rubbed for a few seconds? It turned out to be scorched.

This method can even use green bamboo, as long as the fire is dry bamboo silk, hair, and bamboo chips.

After having the method of taking the fire, Ah Ah was very confident and let the small fire burn out.

said: "I want to use the method of portraying 'one' to record the fire. ”

He used bamboo to draw a word on the ground that Zhang Jingtao would never have imagined before to represent how human beings steal fire.

This word is a big "ten" word!

Zhang Jingtao finally knew the origin of the cross and why the cross used the sound of 'food'.

Because after the fire, you can have food to eat.

At the same time, Zhang Jingtao also understood the origin of the vertical '丨'.

Undoubtedly, this vertical also has the meaning of moving like a horizontal word, which represents a divided, a downward insertion, an upward and downward moving object, an up-and-down friction object, and a vertical strip.

and 1 object, which is the math character 1.

No wonder there must be a large bamboo forest near the Guanyin Temple.

It turned out to be to commemorate Ah He who brought fire to mankind.

For this reason, Zhang Jingtao has no doubt that the lighter that relies on friction to start a fire was invented by the Chinese, but this should not be a gas lighter.

At this point, Zhang Jingtao no longer has any hindrance in praying with a cross.

Since only Chinese people have used bamboo since ancient times, it is not difficult to see this when they observe the daily life of people from all over the world.

Therefore, there is no doubt that the cross represents the admiration for Ah Ah, and the commemoration and continuation of the glory of the fire.

People have always worshipped the cross itself, not the sinner of the twelfth disciple on the cross, the 'Oil Great', which was meant to be a warning to the world.

The only thing Zhang Jingtao didn't understand was:

Why does the cross represent the number 10?

You must know that although later generations think that this seems to be taken for granted, in fact, Gen Ben can't say why the word represents the number 10.

Zhang Jingtao is also at the moment, and he also doesn't know.