Just hearing Ye Feng's comfort, Bass's heart felt a little better, but then Ye Feng's surprise made him really startled. (Book = - house * 0 small -} say -+ net)

"What, what tin ore?"

Ye Feng was overjoyed at this time, his hands and feet were dancing excitedly, like a child who got New Year's money during the Chinese New Year.

It turned out that the stone wall that Ye Feng saw was not a stone wall at all, but a tin mine exposed on the surface. This cave is located at the junction of mountain rock and tin ore, showing a strange scene of ordinary mountain rock on one side and tin ore on the other

Tin is one of the earliest metals discovered and used by humans. As early as the Shang Dynasty, our ancestors were able to produce bronze vessels from tin and copper. That is, with tin ore, the tribe was able to produce bronze.

When Buzz saw Ye Feng at this time, he couldn't help but stand on the spot, his throat twitched a few times, and he didn't know what to say.

After a long time, Ye Feng recovered from his excitement, and when he saw Buzz who was still standing there, and thinking of his behavior just now, he couldn't help but blush, and said embarrassedly: "Well, that, I found tin ore!" ”

"What is tin ore?"

"Well, how do you say that?" , Ye Feng pulled out the copper dagger on his waist and said, "Do you know this bronze artifact?" ”

Buzz nodded.

"You must know the power of a weapon made of bronze, but it has a fatal weakness, it is very soft and easy to break!"

"Ahh Fracture? Bass exclaimed, all along, bronze has always been an invincible artifact in his mind, without any shortcomings, Ye Feng said this, undoubtedly refreshed his three views.

Ye Feng nodded and said, "Yes, it is very easy to break, but now with this copper mine, it can be so fragile and not so easy to break." ”

Bas stared at the tin ore incredulously, reaching out and stroking it for a while, but he didn't feel any difference from the other stones.

Ye Feng smiled, didn't bother to explain again, and said: "In short, don't look at these stones as inconspicuous, it is very important, we have to mine these tin ores and transport them back to the Xingyue Tribe." ”

Buzz nodded, anyway, it was none of his job, and he couldn't say anything else.

If it were other tribes, Ye Feng would not have said the shortcomings of bronze weapons like this, but the Giant Wood tribe is different, he is an authentic strategic partner, so there is no need to worry. Besides, as long as you don't tell the way the metal is refined, you don't have to worry about telling the news that the metal is smelted from metal ore.

Then the two went home, and Ye Feng told a member of the Xingyue tribe the news of the discovery of tin ore, and asked him to go back and inform the mining team and let them come over to mine tin ore.

At night, a light rain fell in the sky, making the already damp tree hole of the Giant Wood Tribe even more damp, Ye Feng lay in this wet hole, feeling uncomfortable, and had no intention of sleeping at all.

"Do you want to build them some houses, they haven't died of disease and have been tortured to death by rheumatism." , Listening to the wails of the rheumatism people of the Jumu tribe next door, Ye Feng thought so. Such a rainy day is a nightmare for people suffering from rheumatism.

Keeping this incident in mind silently, Ye Feng listened to the sound of the rain outside, thought of the faint threat of the traverser, and thought about the future development of the tribe in his heart.

……

A few days later, the mining team of the Star-Moon Tribe arrived with mining tools, and the last of them was leading a giant mammoth.

A person, an elephant, a huge contrast in size, like a small grass looking up at a towering ancient tree, but connected by a thin rope.

Everyone in the Giant Wood Tribe stared at this picture blankly, their eyes widened, their eyes were about to protrude into their sockets, and their jaws were shocked.

In their previous understanding, mammoths, or proboscis beasts in their mouths, they are now well water and do not interfere with river water, as long as they see it, they can hide, they can avoid it, and they have never seen anyone live in harmony with them.

Looking at the huge soles of the feet, they couldn't help but worry if the person holding the elephant would step on the huge feet on his back.

Ye Feng didn't care about the feelings of everyone in the Giant Wood Tribe, his mind was now full of bronzes and bronzes, and when he saw that the mining team was finally here, he couldn't help but step forward to greet him.

"Aang!" When the mammoth saw Ye Feng, it was still very close to him as it was when he was a child, only to see it speed up its pace and run towards Ye Feng excitedly.

"it!" , Ye Feng was frightened, the mammoth at this time was not as cute as when he was a child, as long as he was accidentally swept by its long nose, or picked by its long curved tusks, or stepped on by its elephant legs, then he would explain here.

"Stop!" Fortunately, the loud shout of the elephant puller made this prehistoric giant beast stop, and Ye Feng also avoided the fate of being trampled on.

"Whew!" , Ye Feng breathed a sigh of relief and said secretly: "Fortunately, it's okay, Chuyun University's animal domestication and breeding has not been learned in vain, and a simple instruction made it stop." ”

Ye Feng walked to the mammoth's side, and the mammoth wanted to rub his trunk against his face, but Ye Feng turned his head to avoid it.

He glared at him and gave an order: "Lie down!" ”

The mammoth is very cooperative, with all four legs bent, lying prone on the ground.

Ye Feng didn't care about it anymore, and said to the root of the tree that led the team: "I told you about the importance of tin ore in class, do you remember?" ”

The root nodded and said, "I still remember that as long as you mix copper ore and tin ore in a certain ratio, you can get a new alloy called bronze, which has a higher hardness than pure copper, and is the best choice for weapons." Therefore, this tin mine, its important position is no less than that of copper mine. ”

This answer made Ye Feng quite satisfied, and he said: "Since you are clear, you must keep it secret in the manner of copper ore. ”

The root nodded, indicating that he understood. Then he asked, "By the way, Ye Feng, is there any metal in this world that is harder than bronze?" ”

Ye Feng didn't expect him to ask such a question, seeing that he was eager to learn, so he replied: "Of course, there are many metals in our world, such as iron, manganese, chromium and the like. One of them is harder than the other. ”

Ye Feng, a liberal arts student, only remembered these metals with higher hardness, and he didn't know if there were others.

Of course, those metals with very high hardness do not rely on the whole industrial system, and it is impossible for him to smelt them in his lifetime, so it is useless to memorize them.

As for the very soft metals, he was very impressed by two of them—gold and silver.

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