It took several hours for Xia Weiwei and the others to leave and enter. In a few hours, the soil sprinkled on the raft was covered with water vapor. However, judging from the amount of water vapor above and its distribution, there was no such phenomenon in the mountain stream. The vortex that will cause the raft to bump is obstructed, but judging from the straw mat on the raft, the two layers of straw mat are enough to insulate the scalding hot water under the raft.

After installing the benchmark grass rope prepared earlier in the morning, Xia Weiwei and the others headed out of the mountain stream.

When they arrived outside this time, they placed the crossbar they had brought out on the cantilever of the mountain stream, and hooked the grass rope tied to the raft pole to tie it to the crossbar.

The black stone tugged a few times, and after a while, the wooden chips tied to the rope cracked, and the raft on the water began to move, and then it became faster and faster.

It was only 5 minutes later when the wood chips tied on the rope started to move.

"This is too fast!" Heishi couldn't believe it.

Glancing at him, Xia Weiwei was annoyed: "Why don't I torment it?"

"Hurry up." She raised her chin and tapped the straw rope.

Such trouble is not only to determine the time when the raft enters.

It was so fast to drag in, not to mention coming out, Heishi quickly pulled the straw rope. Soon, the wood chips on the straw rope heard movement again, and the raft appeared in front of their eyes 2 minutes later.

"If this person can sit on it, then getting in and out will not be a problem!" Heishi dared not even think about such a good thing.

While talking, she looked at Xia Weiwei.

Xia Weiwei naturally knew what he meant.

"The pontoon bridge floating on the water is easy to build, and we may not be the only ones to cross the pontoon bridge."

Black Stone: "..."

If you pick it up yourself, build a pontoon, and the wild beasts can't follow it in!

"Tell me, is it useful to set up a door outside?"

"I don't know if there is." Xia Weiwei didn't dare to say this.

Staring at the raft in the mountain stream, Heishi felt a little unwilling.

"Okay, don't worry about it, let's make a high-altitude one when we have time later, directly level with the path, so that the adults in the future can not only drag the prey in on the raft, but also hang it up and carry it in."

"Drag so fast, who bothers to hang it up and carry it in!" Heishi didn't think everyone would be so boring.

Packed up and ready to turn around.

"what happened?"

Xia Weiwei: "..."

At this moment, Xia Weiwei, who turned around and was about to go back, just lay motionless on the mountain wall like a gecko.

Heishi waited for several minutes without seeing her reply, and stretched out his hand to poke her shoulder.

Xia Weiwei suddenly turned around.

"Brother Heishi, do you think we can make a floating floating bridge?"

"Move, pontoon?" Heishi couldn't think about it.

Looking down, and then landed on the raft at the bottom of the mountain stream, Xia was slightly excited.

"If we make a raft as long as this mountain stream, let it out when we use it, and drag it in when we don't need it, will this beast have no way to follow our feet?"

Xia Weiwei spoke very clearly, not to mention that Heishi thinks it is feasible, even Dajiao and others think it is possible.

They stared at the raft under the mountain stream one by one, wishing that the raft would be more sensible and grow up!

"Wei Wei, do you think it's possible to do it section by section, link them up when you're using them, and put them all together when you're not using them?" Someone suggested.

Immediately, someone echoed: "That's a good idea. You don't need to soak in hot water all the time, and the life of the raft can be longer. Maybe this year we only need to do it this time!"

Thinking about it, it's really possible and possible.

But: "That's too troublesome. After making this thing, I'm afraid it won't be so free. Looking back, even if we don't use it every day, there will be people..."

Suddenly, Xia Weiwei felt that she was looking good.

There were few people at this time, so naturally we were worried about the possibility of wild animals entering along the pontoon bridge when no one was around, but looking back, there were more than 20 people gathered in this gathering place. With so many people, no one would think it was dark if they could go out at night.

Looking back, I am afraid that it is released in the morning and can only be taken back at night, and the sturdiness, if there are too many people leaving, it may not be so good!
"Let's go, go back and build a pontoon bridge." I said later, and settled the immediate one first.

Xia Weiwei was about to go inside as soon as she changed her mind, but Heishi caught her before she stepped out.

"You mean everyone will use our things later?"

Xia Weiwei turned around again: "It looks easy to use, do you think someone will not borrow it?"

"I'm afraid there are more people who don't borrow and use it directly." Heishi raised his eyebrows. Those tribes who think they are powerful have always been aloof. If they want to use your things, they will give you face: "If there is a problem at that time, we But it will be troublesome."

"·····":It really is.

"This matter is a headache for adults, let's just make it convenient for ourselves now." Heishi laughed.

Xia Weiwei was a little speechless: Since you all know it, you still have this headache?
"I just want to see if you've thought about this problem!" Opening his mouth, he just showed Xia Weiwei his big white teeth.

Xia Weiwei was even more speechless.

"I don't have time to think about it, okay?" However, the thought is almost the same.

It was rare for Heishi to turn his face back, that little expression was a complacency.

"I didn't think of it until I heard what you said."

He said it was not a matter of time.

Staring at her for three seconds, Xia Weiwei said, "Brother Heishi is really amazing."

"It's so-so!" Heishi farts very badly, imitating the usual Xia Weiwei's expression.

Xia Weiwei suddenly understood that Heishi's mood changed every time he farted like this.

Naturally, Heishi also felt how proud Xia Weiwei was of such a stinky fart.

Looking at each other, the two laughed silently.

"Can I go this time?" she asked.

After thinking about it, Heishi nodded.

The children all came to help, in addition to the adults' requests, they also felt that Xia Weiwei's work would not be useless.

Naturally, when she mentioned the concept of the mobile pontoon, everyone agreed.

Before long, the children moved separately, those who cut trees cut trees, those who weaved grass ropes weaved straw ropes, and those who built shelves on flat ground built shelves.

Previously, the children were at the entrance, and the adults a few hundred meters away could faintly see them. After the crowd dispersed, the adults a few hundred meters away were a little worried.

Mainly kids going in and out of mountain streams.

They are not worried about the mountain trails, but the adults know how many prey there are outside.

The journey was really smooth, except for the white-faced ape, they didn't meet anyone else capable of threatening them, so don't let the children have any illusions.

"Qingmu, I want to go and have a look." Big Yang found Aoki and said.

In fact, Aoki was also very worried.

No one knows better than him how big-hearted his children are.

"It's getting late, the women are collecting, let's all go and have a look."

Although what Aoki said was just to have a look, the men subconsciously picked up their bows and arrows and took their spears.

When the children who were building a shelf at the entrance of the mountain stream saw the adults coming, they thought something was wrong.

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