"Wu, do you want to go in and have a look?" asked Bone curiously.

At this time, there were three Huangqiu tribesmen drilling wood to make fire, and this method of making fire Shen Nong had already taught all the people of Huangqiu after returning from the Cangtao tribe.

"Don't worry, you can throw a few rocks into it. Shen Nong looked at the hole and said.

At present, no one knows what exists in this cave, in case he and the others go in and find out what beasts and fierce beasts are hiding inside, it will be troublesome, so for the sake of safety, Shen Nong still wants to beat the grass first, startle the snake, if there is any creature hiding inside, lead it out first.

The pecking bone immediately complied with Shen Nong's order, only to see him pick up a few broken stones on the ground and throw them directly into the cave.

Smack!

The sound of stones smashing on hard objects came from the cave, and it was very crisp, but it stopped after a few sounds, and it was obvious that the force of pecking at the bones and throwing stones had disappeared.

"Go on. Shen Nong said.

The pecking bone then began to throw stones again, but as the four broken stones in his hand were all thrown away, Shen Nong still did not hear any strange noise from the cave, nor did he see any wild beasts coming out of the cave, so he was relieved.

"You can go in now, are you drilling the fire over there?" Shen Nong asked the three clansmen who were drilling wood.

"Alright, alright. A member of the Huangqiu tribe immediately ran over with a burning branch.

The flame on the branch faltered, sometimes fainting and sometimes returning to its original state, it looked like a candle in the wind, and it didn't seem to last long.

Because there is no oil relationship in the Huangqiu tribe now, there is no way to make a lighting tool that can burn for a long time, which is also something that Shen Nong has been worrying about at present.

In his impression, kerosene is the best burning for civilian use, but Shen Nong really can't think of how to get this thing and what way to do it, so he can only focus on vegetable oil and animal fat.

"I'll have to make some torches out of the fat of that rockback boar when I go back this time, otherwise it's too inconvenient to go to these dark places. Shen Nong took the branch handed over by the clansman and thought to himself.

The wooden barrel he brought with him the last time he went out to the Cangtao tribe was a portable fire source at best, and when this fire source was paired with a torch stained with oil, it could be regarded as a lighting tool.

Taking the branch and walking into the cave first, Peck Bone and the others hurriedly followed, for fear that Shen Nong would encounter any danger, in addition to Shen Nong, the other three Huangqiu people also held a burning branch in their hands, so as to illuminate the dark area nearby.

Whew!

Because the environment is too quiet, the footsteps of Shen Nong and the others are particularly loud inside the cave, and the ground of this cave is full of fine stones, which makes people feel a sharp pain like a pinprick when they walk.

Fortunately, Shen Nong and others are primitive people who have been walking barefoot since birth, and after years of walking, thick calluses have already formed on the soles of their feet, but they don't care much about these road obstacles.

After walking more than a hundred steps forward, Shen Nong and the others finally arrived at the end, only to see that this is a road, although there are only two people shoulder-width at the entrance, but the deeper you go inside, you will find that the area inside is more spacious, and gradually even four people can walk side by side.

Shen Nong looked at everything around him with the help of the fire source in his hand, this road should be the masterpiece dug up by the eel people, because the stone on the rock wall was exactly the same as the one-person-high pile of stones that the had collected in the ruins of the vertebral wooden house.

And there are many marks of chiseling on the rock wall, which looks like it was knocked down alive by some sharp and hard object.

"It is absolutely impossible to chisel the stones for bone products, even if you use the stone pickaxe in my tribe to chisel this kind of rock wall, I am afraid that the result will be very hanging, so how did these people of the eel tribe knock down so many stones?" Shen Nong looked at the rock wall full of holes and couldn't help but wonder.

"Wu!

At this moment, there seemed to be something new on the's side, and he hurriedly waved and shouted to Shen Nong.

Shen Nong immediately walked over and asked, "What did you find?"

"This. Peck directly handed out a T-shaped thing: "I saw it on the ground over here." ”

"This is?!" When he saw this thing in the's hand, Shen Nong's heart was instantly shocked, and he blurted out with a particularly incredible expression: "Where did the Mud Eel Tribe get this tool?!"

I saw that the tool in the bonepecker's hand was silvery-white and heavy, although the shape and production process were very rough, it was still rough to burst, but it didn't affect Shen Nong's recognition that it was a pickaxe, or a pickaxe made of pure iron!

How can the Mud Eel Tribe have iron?

Where did the eel tribe get their pickaxes?

Several questions surfaced in Shen Nong's mind at the same time.

"Wu, there's still one here. ”

At the same time, the other three Huangqiu clansmen also had their own harvests nearby, and they each came over with an iron pickaxe, and there were four iron pickaxes in front of Shen Nong's eyes.

In the history of the Huangqiu tribe, they had never received so much iron.

Shen Nong couldn't help but tremble with excitement, he thought that the Huangqiu tribe was going to enter the stone civilization from today, but he didn't expect that now he could even see a trace of the iron civilization, which was really a surprise to him.

"Is there anything else? Shen Nong hurriedly urged, the branches in everyone's hands are almost burned now, and it is estimated that this burning speed will not last too long, so Shen Nong and the others must leave this cave before the flames are extinguished, and during this time, he must ensure that he and the others will find all the iron pickaxes that exist in this cave and take them away.

At the urging of Shen Nong, the four bone immediately searched around the cave, and their efforts paid off, and they finally found six iron pickaxes, plus the four found before, a total of ten iron pickaxes.

Seeing that there was nothing new to discover, and the branch in his hand was about to be completely burned by the flames, Shen Nong said loudly: "Let's go, we should leave here." ”