Although it is rough workmanship, it is heavy to start with.

The sharp edges and corners scraped the hand, and there was the touch of iron.

Mu Bai's eyes lit up!

I feel like metal, but I don't know what kind of material this spear is?

Although Mu Bai chose physics for the college entrance examination and has some understanding of metal ores, reality and theory are sometimes even worlds apart.

Among other things, the color of the ores seen in the picture alone is very different from the effect of oxidation or alteration with other metals.

She took the spear in her hand, hesitating between iron and copper, unable to make up her mind.

But there is no doubt that whether it is iron or copper, it is unique good news for the Yanlong tribe!

"Is this a lot?"

"Many! The Chiyan tribe is full of such large rocks all over the mountains. Wu Yuan hurriedly replied and handed her a handle.

It may be the length of the stone, and although it is said to be a spear, it is not really long.

"It's just too laborious to polish, harder than the stones on our side!" Wu Yuan stretched out her hands aggrievedly, "Look, Wu, my hands are worn out." ”

This is still a handle that she finally polished under the premise that Wu Yuan awakened to become a bloodline warrior.

"Thank you for your hard work, good things, I like it very much!"

Mu Bai rubbed the black circle that was eager to show his merit in front of him, and a smile bloomed on his face.

The ore that is so exposed to the outside is mostly cuprite.

It's really sleepy and meets the pillow.

She is preparing to wait for the weather to warm up, and the ice and snow outside will melt and cultivate the wasteland, if she can get the tools out, then she can directly skip the process of slash-and-burn farming, and directly transition to farming!

Mu Bai caressed the two special stone tools, full of joy.

It's just that for the time being, she can't tell whether this is iron or copper, and she hasn't started refining it yet.

Everyone didn't know that there was an unexpected gain from their trip, but it didn't affect the cheerful atmosphere in the tribe at all.

The fact that all the people who traveled far and wide to trade have all returned, in such bad weather, is a thing worth celebrating.

Coupled with the jerky exchanged from the Chiyan tribe, the tribe's warehouse for storing food was instantly piled up again.

Enough food is the foundation for a tribe to survive.

The people who traveled became heroes, and they were surrounded by the clansmen to ask for warmth.

Even if he delayed for a short time to eliminate the practice time of the formation, Mu Bai was rarely generous and did not urge.

The morale of the tribe is sometimes more important than the strength.

What's more, the people of the two tribes have just merged here, and they have to have a sense of belonging and pride.

"White, here you go."

Mu Bai watched the carnival outside for a while, and then turned back to the cave, and saw Mang standing there a little restrained and uneasy.

He was holding a hide in his hand, and he didn't know what was wrapped in it.

"Give it to me?"

Mu Bai was a little surprised.

If she's not mistaken, this is the first time Mang has called her name, right?

And the communication between the two has never been so avoidant of everyone.

Thinking of this, she became more and more curious about the contents of the animal skin bag.

I took it without thinking about it.

"There are a lot of women in the Chiyan tribe, so I just thought, see if you like it or not."

It was rare for Mang to say such a long string of words, but the other side didn't seem to react?

When he raised his head from the restraint, he saw Mu Bai stunned, as if he was frightened!

"You, what's wrong? Dislike? ”

"Mang! You've helped me a lot! The next moment, I saw Mu Bai jumping up with joy.

"Like, how can you not like it?"

At this time, Mu Bai looked at Mang, he had never said that he looked so good-eyed, if he wasn't still a little sensible, if he wanted to take care of the difference between men and women, she couldn't wait to hold his face and kiss him twice!

"It's malachite! I made sure that the thing that Manniu and Wuyuan gave me just now was copper. ”

"The Red Rock Tribe is located on an open-pit cuprite mine, that's too good!"

"What...... Is it? ”

Mang felt that his brain was really not enough in front of Mu Bai.

Obviously, at this time, the focus of both of them is not on the same channel at all.

Mang just wanted her to see the beautiful stones that she had polished with her own hands, and she just wanted to see how these stones looked on her head, neck, and hands.

Wonder if she likes it or not.

But now, there is no doubt about liking, but this 'like' seems to be different from the 'like' he thinks he thinks.

Mu Bai took the stones, and didn't look at them at all to see if they were finely polished or not, and whether the patterns were beautiful.

It's a mouthful of malachite, copper, associated minerals or something, he can't understand it at all!

"Oh!" Mu Bai saw Mang's confused look, and finally realized that he was overjoyed and didn't make his words clear.

"Wait."

She hurriedly flipped the almost dull fruit knife out of her backpack.

"Didn't you say that it was very sharp and unmatched? Before, I was powerless, but now that you have found something good in the Chiyan Tribe, although you can't make such a delicate knife all at once, you also have some hope! ”

！！

Mang, who was still a little lost just now, suddenly lit up his eyes.

"That's all there is to it?"

His gaze scanned back and forth over the stone spear in Mu Bai's hand and the stone he had sent, but he didn't find anything unusual.

When I was in the Chiyan Tribe, I was a little surprised to see these things, but now I said that if I wanted to compare these with Mu Bai's knife, the gap would be too big.

I can't even think about it!

"So how? What can I do? ”

But since Wu said so, no matter how difficult it was to accept, Mang Ye immediately put aside all distractions and quickly adjusted the direction of his thinking.

There is no need to elaborate on how useful Wu's knife is.

With that sharpness alone, if the people in the tribe can handle it, then what opponents do they have in the plains?

What if it was bigger and bulkier?

Just thinking about it can make the chief of the Mang, the tribe, want to start immediately.

In fact, there is no need to urge, Mu Bai has already racked his brains to recall the knowledge he learned in the textbook before.

Refining copper is not complicated, but how to use backward and primitive methods is very difficult.

After all, in the world before her, copper was already a metal that had been eliminated, and it could not play much of a role, and ordinary people would hardly care about it.

If you can buy something for a few dollars, who cares about its past and present lives?

Even Mu Bai, a rare person who loves to drill the tip of the horns and dabbles a lot, can't think of it for a while.

Copper does not have a high melting point, but it is not enough to melt copper ore.

What exactly is needed?

Mu Bai paced back and forth in the cave, forgetting that there was a man who was waiting for her to answer.

"Carbon monoxide! That's right, this is the ......"

Carbon monoxide reduces copper oxide, it is a reducing agent, why did you throw away the textbook for a few months, and the knowledge you have learned is lost to the teacher?

While Mu Bai secretly blamed himself, he had already thought of a way to refine copper.