"Just a stone?" Acorn scratched his head, he didn't understand why a green stone could be exchanged for a powerful bow, was it because it was beautiful?

"Yes, if you don't want to change, forget it."

"I'll change!"

Acorn plucked the green stone from the pendant, the string of animal teeth was the amulet his mother had made for him, and the green stone would be tied to it when it was beautiful.

Gu Guo took the green stone handed over by the acorn and ran to a place where the crowd was sparse.

Now people's eyes are all attracted by the competition between the acorn and the birch, and the birch is surrounded by a group of women, Gu Guo thinks that his second uncle will have quite a lot of descendants in the future, and he doesn't know if he can stand it.

Gu Guo smashed the green stone blocks with stones in a remote place, crushed them into powder, and then sprinkled some into the fire, and after a while, the green powder gradually turned black, he guessed that this was the main ingredient in malachite, basic copper carbonate, which was reduced to copper oxide by heat.

In order to verify that these black particles really contained copper ions, Gu Guo put the black particles on a wooden stick stained with water, and then stretched them into the fire, and so on many times, and finally five flame reactions before and after, all of which were a wisp of green flame imprinted in his eyes!

It is the color of copper ions!

Back in the crowd, Gu Guo motioned to his mother to put the clay pot in the most conspicuous place, and after showing his strength with a bow and arrow, he also had to display his own goods.

The four hundred people who had never seen pottery had gathered around and looked at the red thing curiously.

Some people dared to come up and touch it, the hard shell of the clay pot was like a stone, and the fingers flicked to make a "bell" sound.

"What does this thing do?" The man who had touched the clay pot asked Gu Guo's mother.

"It's for cooking meat!" The mother replied.

"Boiled meat?" The man didn't know why.

The people of licorice and locust flowers have all tasted the taste of broth, and one by one they started free publicity on the side, which attracted the 400 people to look suspicious but yearn for it.

"What you see with your eyes, it's better to eat it in your stomach, second uncle, come and light the fire!" Gu Guo shouted at Hua, who was leaning against the tree and rubbing his waist at this time. In the short ten minutes that he had been running to do the flame reaction, Birch had finished his work several times, and was resting at this time.

Hearing his nephew shouting to himself, Hua straightened up, grabbed a few handfuls of hay and leaves from under his feet, and ran towards Gu Guo's side.

Leaves and hay are excellent ignitors, and the oil rich in dried leaves can make the fire burn more vigorously.

When he and Shi go out hunting, he often brings a small clay pot to open a small stove for the members of the hunting team, after all, who doesn't love the hot broth?

After a while, the oil splashes were churning in the boiling water, and the rich aroma of meat wafted through the forest. The acorn swallowed his saliva as he saw the flesh in the water slowly turning white from bright red, and the green leaves like the stone on his pendant tumbled in the water, puncturing the floating oil stars, there was such a miraculous thing in the world!

What surprised him the most was that Birch also grabbed a handful of white things from a clay pot and sprinkled them in the clay pot, and the acorns were really visible on the edges, which was table salt!

Oh my God, how can this tribe have so much salt!

"It's a clay pot!" Gu Guo pointed to the pot where the meat was being cooked and said, after speaking, he raised a clay bowl in his right hand, "This is a clay bowl, it is used to hold meat!" ”

"This is a chopstick, it's used to hold meat!"

"This is a clay pot, which can be used to hold water, meat, and salt!"

Every time Gu Guo introduced something, he held it high above his head so that the people behind him could also see it.

Songzi pulled through the crowd and walked to the front, and now the leaders and priests of more than a dozen tribes were basically surrounding Gu Guo.

Matsuko asked, "Did you introduce these to us in exchange for us?" ”

Gu Guo thought to himself that this guy was really good, and then took out more than thirty pottery coins from the bamboo basket beside him.

When everyone saw Gu Guo's stacked pottery coins one by one, the shock in their eyes was better than seeing the pottery pot.

In their opinion, the more than 30 pottery rings, whether they are outer or inner circles, are perfectly round, and they are even more surprised by the concentric circle lines engraved on them and the five-pointed star on the other side.

"What is this?"

"It's beautiful, but it's empty in the middle, so it can't be used to hold things, right?"

The crowd began to speculate about the purpose of the pottery coins.

"It's called money! You can go to our clan and exchange anything we have! Gu Guo shouted loudly.

"One pottery coin can be exchanged for a pottery pot, five pottery pots, and twenty pottery bowls!"

"We all have the same ancestor, and they instructed me to make bows and arrows and pottery, so that my tribe would not go hungry in the winter and drink delicious broth. I don't think our tribe can enjoy the guidance of our ancestors alone, but this time we have few people, and the clay pots and pots we bring cannot be distributed to all the tribes, so I made some pottery money, you can take the pottery money and go to our tribe to exchange! ”

After that, Gu Guo gave each tribal leader and priest a share, and the pine nuts and acorns were crowded in the innermost, and after they got the pottery money, they turned over and saw that the circle on the pottery ring was so perfect, even if it was used as a decoration, it was also excellent.

Acorn suddenly thought of something, and he asked, "Can Tao Qian be exchanged for bows and arrows and table salt?" ”

Gu Guo smiled and nodded: "Yes!" ”

After Gu Guo's mother and Songzi had a quarrel, Songzi exchanged two pottery coins for two bows, and the priests and leaders of other tribes followed suit, some changed clay pots, some changed salt, and when the latter squeezed up, the materials brought by Gu Guo and his group of twenty-six people were almost replaced.

"Ladies and gentlemen, we don't have many clay pots, salt and bows, and don't worry about the tribes that haven't been replaced, you can walk along the river and you will find the cave where our tribe lives, but when it snows, we won't live in the cave." Gu Guo explained to the leaders and priests who had not exchanged for things.

"If you don't live in a cave, where do you live?" Everyone was puzzled.

"We'll live in a house by the river!" Gu Guo replied.

"The house?" It's something I've never heard of.

Everyone was still immersed in the joy of the clay pot and salt in hand, and no one thought about what the house in Gu Guo's mouth looked like.

Matsuko handed the two bows to the two hunters with the best hunting skills in the tribe, while Birch taught him the art of archery, and only when the three of them could shoot their bows and arrows normally did he run back and take a sip of the broth.

Acorn fired more than ten arrows, and he found that the bow and arrow were indeed much more accurate than the sling, and that three or four people could shoot arrows when they were crowded together, but the slings had to be separated by some distance, and it was easy to injure his own people by mistake.

As if he had opened his mind, Acorn thought again, since Gu Guo's tribe could exchange pottery pots and salt for pottery money, could his own tribe also exchange food for pottery money from other tribes? With bows and arrows, the tribe will definitely have a lot of surplus food, and it should be okay to take this food and exchange pottery money with those tribes who have not caught their prey.

Then exchange the exchanged pottery money for bows and arrows!

Acorn was about to tell Gu Guo what he thought in his heart and asked if it was feasible, but he saw Gu Guo walking towards him first.