Riyan was finally killed, and Zhao Hao solved this disgusting guy, and it seemed that he could go back to the salt department.

However, Cangwu had just lost his beloved son, and it seemed a little inappropriate for him to pat his ass and leave, so he decided to stay for two days before leaving, so as not to make Cangwu unhappy.

So, what are you going to do these two days?

Zhao Hao found that he seemed to have to eat desperately in the nest, and first ate the heart and liver of the alien beast saber-toothed tiger or something.

These are the best parts of the saber-toothed tiger's body, and if you eat it, you can at least increase your strength by more than a thousand catties.

So, he hid in his little shack and ate again.

This guy, the heart of the saber-toothed tiger, the liver, the kidneys, or something, adds up to dozens of catties, two days, if you want to finish eating, the difficulty seems to be not small, but fortunately, with the explosion of his strength at this time, his digestive ability has also become stronger, although it is a little supportive to eat a dozen catties at a meal, but it can barely withstand it.

With a tiger's heart, his strength suddenly increased to more than 6,000 catties, that feeling, it was really cool, with his current strength, ordinary beasts, I'm afraid he can go it alone!

At this time, he even suspected that with the growth of his strength, it was not impossible to leap in the air or tread water, because at this time, he could jump up at least more than ten meters high with all his strength, and he could jump out twenty or thirty meters with all his strength, isn't this similar to the legendary light skill?

He was sitting there thinking nonsense, Ah Yun suddenly covered his nose and leaned in, took a look, and then said in surprise: "Husband, you are up, Sister Ah Yue said that she would take us around, will you go?" ”

I didn't sleep well!

When Zhao Hao heard this, he hurriedly got up and followed Ah Yun out.

To tell the truth, the smell in this thatched hut is really unbearable for ordinary people, only people like him who eat the marrow and know the taste don't care about these smells, ordinary people, it's good if they don't vomit when they smell it.

At this time, Ah Yue was already standing outside waiting, there seemed to be a trace of melancholy on her face, and when she saw Zhao Hao, she only smiled reluctantly, and then said softly: "We are going back to the salt department, and I don't know when we will be able to go back to the Black Stone Department to see, husband, let's go around together." ”

I see.

After all, Ah Yue grew up in Blackstone since she was a child, and it is normal to be reluctant to give up.

It just so happens that he is also a little panicked, and taking a walk will help digestion.

There's nothing to see in the Black Stone Gathering Place anymore, anyway, except for the treehouse is a thatched hut, they've all turned around in the past few days.

Ah Yue took them to the place where he used to play when he was a child, that is, the cave where the Black Stone Department originated.

This cave of origin, to put it bluntly, is the first settlement place found by a group of ancient humans when they first entered the wild jungle, or when they first arrived in a strange place.

Because at that time, they were not able to resist the attacks of fierce beasts and foreign beasts, and they didn't know what the surrounding environment was, so they would basically find a cave to hide in it first, and then survive first.

In ancient times, many tribes survived in this way and gradually multiplied.

Therefore, almost all tribes have origin caves, and the Black Stone Department naturally has them.

The origin cave of the Black Stone Department is not far from the current gathering place of the Black Stone Department, and after turning over a mountain, it is also there, but the resources over there have almost been exhausted because of the consumption of the ancestors of the Black Stone Department for decades or even hundreds of years, so the ordinary people of the Black Stone Department rarely go there to forage for food, and some playful children often run to play.

Ah Yue silently took Zhao Hao and Ah Yun, followed the footprints of his childhood, and climbed over a mountain, and on the slope not far in front of him was the origin cave of the Black Stone Department.

Zhao Hao looked at the situation nearby and was stunned.

It's not that the origin cave of the Black Stone Department is magnificent, it is just an ordinary cave, and the entrance is not even as big as the salt department, and he was surprised by the black stone near the cave.

He finally knew why the Black Stone Department was called the Black Stone Department, because there were black stones everywhere near the Black Stone Department's origin cave!

Black stones are uncommon, because the stones are usually earthy yellow or blue-gray, with occasional dark red and dark green, but black ones are really rare, unless they are some kind of mineral deposit.

So, what exactly are these black stones, and could they really be some kind of mineral deposit?

Zhao Hao was curious, followed Ah Yue's steps, and slowly walked to the vicinity of the origin cave of the Black Stone Department, picked up a piece of black stone and saw that it was really coal!

It's all coal!

In other words, it's actually an open-pit coal mine!

He didn't even have to dig to know that under the weeds and bushes, it was also black, and it was all coal mines!

There are so many things that can be done in such a large open-pit coal mine.

He couldn't help but ask, "Ah Yue, do you know that this stone can be burned. ”

Hearing this, Ah Yue hesitated for a moment, then nodded and said, "I know, we use this kind of stone to burn clay pots and clay bowls." ”

It seems that this is the secret of the Black Stone Division, because almost all the tribes around the Black Stone Department know that the Black Stone Department is rich in clay pots and pottery bowls, but they don't know how these clay pots and pottery bowls are fired.

He has been in the Black Stone Department for so many days, and he has not seen how the people in the Black Stone Department burn pottery, perhaps, they are afraid that someone will learn this skill.

Firing pottery is not something that any tribe can do in these years.

After the clay is fired, it will harden, and it will become pottery to a certain extent, which many tribes know to some extent, but they can't understand where the Black Stone Department got so much firewood.

Pottery is not a rare thing in these days, and almost every tribe has some, but they are basically exchanged with the big tribes nearby.

Many tribes have also tried to make pottery from clay, but almost none have succeeded.

The reason is very simple, it is because the firing of pottery is too wasteful.

If the clay is not fired long enough, if the fire is not big enough, the fired pottery will be a flower shelf, and it is very likely that it will break when touched, or it may leak when used.

How to fire qualified pottery, has always been a headache for many tribes, if you want to meet the firing requirements of pottery, I am afraid, it is not enough to send a bunch of people to chop firewood constantly.

Therefore, everyone couldn't figure out where the Black Stone Department got so much firewood.

Now, Zhao Hao finally understands that it turns out that the Black Stone Department uses coal, and they already know how to use coal!

This coal can be used for more than that, and coal can be used for many things.

What exactly can coal be used for?

Just as Zhao Hao was standing there thinking about it, Ah Yue had already gone to the cave with his childhood memories, and Ah Yun had already followed, so he could only throw away the coal in his hand and follow first.

To be honest, the environment in the cave of the origin of the Black Stone Department is very dirty, because it is like a coal mine, and there is black coal everywhere.

However, there is an underground river running through the depths of this cave, and it is easy to get water.

This may be the reason why the ancestors of the Black Stone Department chose here, dirty, what does it matter, survival is the most important thing, so a cave with a water source is not easy to find, no matter how dirty it is, it will not affect people's survival.

This trip to the Origin Cave of the Black Stone Department made Zhao Hao unable to calm down for a long time, and he kept thinking about what the best coal was used for.

Finally, it finally occurred to him that coal was of course the best way to make iron!

At least, that's the case.

With coal, finding some iron ore and finding a way to smelt iron would be a qualitative leap for the entire race and even the entire human race.

Because, the use of iron is too wide.

Iron can be used to make all kinds of knives, and if you have even a small knife, you don't have to vomit blood so slowly when you divide your prey.

Iron, can be used to make a pot for cooking, with an iron pot you can stir-fry, cooking soup is much more convenient, a large iron pot, boiling a few hundred catties is not a problem

Iron, which can be used to make nails, if there are nails, it is much more convenient to build a house.

Iron can also be used to make real hoes, and if you have a real hoe, digging traps is a breeze!

In short, there are many uses for iron, and Zhao Hao even can't wait to find it to see if there is any iron ore near the Black Stone Department.