Hearing Cheng Zhi's voice, Zhou Yi hurried over, after all, it was an unknown world, and he was also careful, and his perception was already fully open.

There were no creatures found around, and when I walked in front of Cheng Zhi, I found that there was indeed a hole under my feet, to be precise, the huge size of this hole was comparable to a sinkhole, and it was unfathomable when I looked down slightly, and I could feel the wind around me, rolling downward.

"You call this a hole?"

Cheng Zhi grinned, his face was a little embarrassed, as if the word was a little inaccurate.

"The cave is a bit big, I didn't say a technical term, in fact, to be precise, this is called a sinkhole, a kind of karst negative terrain in the carbonate karst area with steep walls, depth and caliber of up to hundreds of meters. ”

Hearing Cheng Zhi's introduction, the few slaves who followed behind were all wide-eyed, they could get the lord's approval, and they spoke so casually, obviously capable.

The fat man leaned over and glanced at it, the flesh on his face trembling.

"Boss, we won't go down to such a deep pit, right?"

Zhou Yi glanced at the control disk in his hand, it could not show the whole picture of the map, only this hollow sign at his feet, obviously there was a reason for this, it should be like the Five Elements Tomb, explore everything in front of him clearly, and then open the map further.

But how does this sinkhole go down?

As far as the eye can see, the sinkhole is at least a few hundred meters deep, and the bottom is not visible, and the rope prepared by Sophia does not know if it can reach the end.

"Look how long the rope is!"

Thinking about waving his hand, he threw the rope out of the storage box, and the fat man hurried over, and Natu and Tux were very conscious, helping the fat man to arrange the rope together.

"Boss, this rope is only a hundred meters, and it can't reach the bottom at all, so you still have to make a ladder with a big orange. ”

Zhou Yi looked at Cheng Zhi, "There are a lot of vines around, you can see if you can use it, as strong as possible, after all, there are a lot of us." ”

Cheng Zhi nodded, hurriedly stuck to the edge of the sinkhole, and began to make a ladder, the fat man leaned over, and said in a low voice:

"Boss, if there is a drone that can be reconnoitred, I wonder if Sophia has any stock there?"

Zhou Yi shook his head slightly.

They returned directly to the base from the 2000 world, in that world such technology is not so developed, there is naturally no such thing, but it can be prepared later, and it is impossible to use this method at the moment.

Sticking to the edge of the sinkhole, Zhou Yi took a closer look, it was very dark below, and he threw a stone down, and after about eight or nine seconds, he heard the sound of landing, and Zhou Yi frowned.

According to this calculation, the depth of the sinkhole is 320-390 meters, and he leaps forward, jumps down dozens of meters and can control the speed, so deep that he will directly fall into a meatloaf.

After waiting for almost half an hour, Cheng Zhina was finished, and looked sideways at Zhou Yi, his face was already covered with sweat, and his face was a little pale.

"You take a little rest, and the two of you watch on it, and I will go down with the fat man to explore the way. ”

Cheng Zhi shook his head.

"Fat brother can't go down, this ladder is a little difficult to bear, or let the fat brother stay, I will go down with my husband, there is a problem at any time, we can continue the ladder, I don't know what the situation is underneath!"

The fat man blew up, gave Cheng Zhi a blank look, and bumped into him.

"Don't discriminate against the fat man, I'm thin, now it's two hundred and two in the sky, I see don't argue, let Natu, Tux, Ye Shu and Mint stay, guard the top, after all, prevent any wild beasts from coming, give them weapons to wait, or let's go down."

Besides, if there is an emergency below, the three of us will have no problem cooperating, and it's really hard to say with the four of them. ”

Zhou Yi thought about it, and agreed with the fat man's statement, it is true that the four of them are really bottomless, if there is no problem below, they can naturally let them go down, but they still have to leave someone to guard the top, the ladder is cut down, and no one can come up.

Glancing over the four of them, it was clear that they preferred to follow.

"You four are on it for the time being, let's investigate first, if it's safe, let you go down and go down, and Natu and Tux are guarding the mouth of the sinkhole above to avoid the beasts' attacks, otherwise we won't have a way out. ”

Hearing Zhou Yi say this, the two naturally had no opinion, Zhou Yi put down a few knives and threw them to the four people, then walked to the ladder, put on the headlamp, and was the first to grab the ladder and climb down.

Then came Cheng Zhi and the fat man, the two of them grabbed two ladders on the left and right and climbed down.

The front more than 50 meters is quite smooth, after all, it is attached to the entrance of the cave, and there is a stone wall to support, but the more down, the more it is suspended, the ladder is shaking very much, and the fat man next to him is rippling left and right.

"The boss ladder is shaking badly!"

Zhou Yi glanced at it, at this distance, he couldn't help if he wanted to.

"Either endure it or climb up!"

The fat man pouted and quickly shut up.

In fact, just like Zhou Yi said, at this time, you have to rely on yourself, either continue to go down, or climb up, above is the slave you bring, it's really embarrassing to go up, the fat man quickly controls his body and slowly climbs down.

Continuing to go down, Zhou Yi felt that his arms were already a little weak, but he still didn't reach the bottom, it was more humid and cold than above, and the temperature seemed to have dropped a lot.

Looking down at this time, as the side head seemed to be able to see some protruding stones, Zhou Yi was overjoyed, obviously this was about to reach the bottom, but the large area below was still not clear, and the headlamp could not illuminate it.

"Be careful, we're almost at the bottom, and we can't see what's down there. ”

Cheng Zhi was very fast, and he was already side by side with Zhou Yi, only the fat man was a little farther away, Zhou Yi slid down, while observing carefully, he saw that there was a reflection below, and he was about to jump down, so he hurriedly grabbed the ladder.

"Be careful, there's water down there!"

As soon as Zhou Yi finished speaking, he heard a sound of falling water from Cheng Zhi's direction, obviously Cheng Zhi didn't pay attention and fell directly into the water.

Zhou Yi looked left and right, and it seemed that there was a protruding stone in front of him, the one he saw above, and he hurriedly jumped up.

"Cheng Zhi throw a vine to me, and I'll pull you up!"

Cheng Zhi sank and floated, and when he heard Zhou Yi's voice, he hurriedly threw Zhou Yi a vine, and both of them pulled hard, which pulled Cheng Zhi to the stone.

As soon as he came up, Cheng Zhi lay on the stone and coughed constantly, just choked a few mouthfuls of water, the light here was insufficient, almost like the night, Zhou Yi looked in the direction of the fat man, he hadn't come down yet, obviously hearing the sound here, he was scared a lot.

"Don't worry, fat man, I'll pull you over in a while, and there is water under your feet. ”

Cheng Zhi eased up a little at this time, his consumption was relatively large, and after climbing the ladder for so long, his physical strength was a little overdrawn, but he still threw a vine towards the fat man, and the ladder continued to extend.

The fat man shouted twice in horror, and quickly slid down, landing directly on Zhou Yi's side.

Groping for the stones under his feet, the fat man took out a flashlight and shone it up and down, this is the strong flashlight prepared by Sophia, but at the bottom of the sinkhole, it can only illuminate a little position, and after looking around, the fat man shrunk his neck.

"Boss, the water here seems to be living water, you see there seems to be a longer hole on both sides, the water flows from one side to the other, we are a commanding heights here, but what should we do, do we go diving?"

Zhou Yi was silent, one difficulty after another, now it is difficult to ride a tiger here, if you want to go up, you also need to swim to the lower position, find a ladder to go up, but there is no diving equipment on your body!

Cheng Zhi was squatting on the ground at this time, constantly scratching his body, and the fat man looked at Cheng Zhi with a flashlight, and saw that he seemed to have a painful look on his face.

"I said big orange, what's wrong with you?"

Cheng Zhi shook his head, and he didn't know where to scratch when he opened the bow left and right.

"I don't know, it's just that it's itchy all over my body, and it looks like something is crawling. ”

Zhou Yi knew that Cheng Zhi was not a hypocritical person, he said that itching was naturally a problem, so he quickly reached out and grabbed the zipper of Cheng Zhi's jumpsuit.

"The fat man's flashlight shines through. ”

The fat man sighed, quickly raised the flashlight, and shone it towards Cheng Zhi, at this time Zhou Yi had already opened Cheng Zhi's zipper, the fat man wanted to joke, but before he opened his mouth, his hand trembled, and the flashlight was almost thrown away.

"What am I going to do here?"