After listening to Hao Dong's explanation, everyone looked at each other a little.

At this time, the water in the passage had almost risen to the maximum, and sure enough, it was swaying on the edge of the hole, but it did not rise any further.

In this case, if you put a mini raft on the water that can stand on people, if the water level drops, it seems that you can really be taken to the bottom of the cave.

But that sounds too fantastical!

According to what Hao Dong recalled, this place had gone deep underground.

That is, although the road they followed was not obvious, it actually had a downward slope, and after walking for a while, they had actually entered the area of a large underground lake.

And this place was built even deeper, further below the water source of the underground lake.

Underground lakes also have tidal waves, and at high tide the lake swells and floods close to the mouth of the channel. As soon as the tide drops and the water level drops, the entrances and exits under the passage to other buildings are exposed.

Ergou looked at the almost complete shelf that had been set up on the top, and suggested carefully: "Otherwise, let's wait for the tide to go down manually?" ”

Hao Dong shook his head: "The underground lake here is very weird, it is divided into several layers. Tides are just borrowed expressions, not normal tides, in fact, the time difference between the rise and fall of the water is very short. ”

The underground lake is divided into several layers, so when you fall, you have to come layer by layer.

Descend to the ground on the first floor and find the entrance to the lower level. Once inside, cover the upper passageway, then fall to the bottom of the passage, wait for the water to rise in the lower layer, and repeat the same steps.

Combined, the distance of the descent is nearly a kilometer.

Therefore, if you want to wait until the water falls and descend directly, not to mention the problem of being caught up by the water, they need ropes to fall, that is, all the passages must be opened at the same time, which will cause the entire underground complex here to be flooded.

Zhao Zhengdu, who listened to this structure, frowned: "Why are you so tossed?" ”

Hao Dong knew that he must have been here before, but he couldn't remember what he came for, and what he experienced after coming, all his memories were vague, and he could only say a rough idea:

"It's not a place to do serious business, and it's designed to prevent people from easily discovering it."

Ergou was curious: "It's not a serious thing...... What's that for? ”

Hao Dong didn't know how to describe the concept in his head: "Probably...... Similar to a cultivation base? ”

However, the things cultivated in it are definitely not normal, and they should exist in the world.

As for what the people who have lived and worked here have done and how far, he really can't remember. All he knew was that he had come here secretly, as if to confirm something.

So, is it still very good for me before I lost my memory?

Finding that his thinking began to run out of bounds again, Hao Dong immediately turned his head to look at everyone and quickly returned his thoughts.

After walking here, it turned out that they thought that they might not be able to find a way out for a while, so everyone began to consider the possibility of returning to the ground first. But after listening to Hao Dong at this moment, it is clear that there is already a way out, and it is not the style of anyone present to turn back.

But it's not easy to get down.

Even if Hao Dong has already remembered this part, it is also a memory from before. According to Hao Dong, he doesn't know whether it was a year or a few years ago, and it's hard to say whether this is the case or not.

Qi Jue, who had never spoken, gave a decisive suggestion at this time: "Since it is a paragraph, go down and read a paragraph." ”

Daigo empowerment.

It is true that everyone can brainstorm ideas when they discuss together, but sometimes they influence each other, and it can create a state of confusion among the authorities.

Qi Jue didn't speak before, just quietly listened to everyone's gossip, and the onlookers were clear.

Although the time interval between the ebb and flow of the tide is relatively short, it is not to the extent of instantaneous rise and fall. Let's go down and take a look at it first, and then continue to go down if it feels right, and if it doesn't work, go back directly, this kind of thinking is normal!

Think of it, do it.

While they were hesitating, the water level in the passage was already beginning to drop, and sure enough, the water here could not be judged by the normal tide conditions, and it had to be done as soon as possible if they wanted to go down.

There is no way to turn out of the raft at once, but fortunately, the reel shelf on the top has been almost set up, and you don't need to go down with everyone just to see the first section.

The queen took Zhao Zheng and Hao Dong to stay at the entrance of the cave to take care of the rope by the way, Qi Jue and Ergou each checked the weapons and equipment on their bodies again, and the two of them staggered a certain distance and began to decorate down the rope.

This time they didn't go for long, and soon there was a video signal coming back from the bottom.

Even with a strong light, the view from the bottom of the cave is not good. The surrounding water mist was too heavy and the visibility was poor.

But you can see what's going on.

It turned out that the first section of the hydraulic elevator passage at the bottom of this was almost 300 meters deep. At the bottom was a mound of dirt, and the mud on it was so wet that nothing could fall on it.

The two of them rummaged through the mound for a while before they found the lid of the lower passage that had been covered in layers of silt.

The speed at which the tide rose was significantly slower than the rate at which it receded, which gave Qi Jue plenty of time to remove the lid and study the situation underneath.

Probably to prevent water from leaking in, the lid is a sealed structure, so it is more resistant to preservation, and the next layer of passage is actually in very good condition.

Perhaps it should be said that it is too good.

Zhao Zheng stared at the picture sent back, depressed: "Is this a sci-fi movie?!" ”

The passage under the lid has an all-metal structure, silver-white walls, and a stand to climb on. Under the strong light, there is even a little sparkle, which is simply incompatible with the surrounding environment.

Hao Dong was also surprised that his memories did not contain this part.

However, the queen was still calmer and calmly commanded: "Check the firmness of those brackets." ”

The bracket is very sturdy, so there should be no problem at all when used for climbing. The distance of the whole passage is not long, at most about ten meters, and you can clearly see the bottom from the top.

In other words, if you come down with a rope, you can continue to hang it with these brackets, and it doesn't matter if you don't have a raft that can float on the water.

Since it was possible to go down, Qi Jue and they soon returned to the house. However, although this trip seemed relatively relaxed, the environment below still left a little memorial for them: both of them were soaking wet.

Ergou directly suggested: "It's too humid down there, so it's better to change into a diving suit we brought." ”

The wetsuit they brought this time has the function of sealing and isolating moisture, and it is a close-fitting design, so it will not become bloated after wearing it. In today's situation, it should indeed be a good choice.

With preparation, the next action is a little easier than expected.

There are three underground rivers, and there are two metal passages in the middle. It is about that both ends of the channel are well sealed, and the internal materials are alloyed, and they are not eroded by water vapor, so it is easy to go down.

However, the part that borrows the river is still a slippery adobe passage with slippery walls, and the walls are also overgrown with aquatic bryophytes, which is a little uncomfortable to see.

And between the bricks, as in the silt heaps at the bottom of each river, there are bugs that are not clear of what kind of worm is burrowing in them.

These insects are long and short, and the longest one Hao Dong saw was almost longer than his fingers, and his body was also covered with hair like a green turtle, which made people's scalp tingle subconsciously.

But this is all trivial, just don't pay attention to it and it will pass.

The most troublesome thing is at the bottom of the last section of the hydraulic elevator.

This is the end of the day, and the remaining lake here is also the most like an underground river, more than two meters wide, the depth of the water must be more than one meter, and in some places you can't even see the bottom of the water at all.

In this kind of water, it is not that there is nothing like the two underground rivers above, but there are black shadows swimming.

Hao Dong hung himself directly with a rope and did not directly touch the lake. But on more than one occasion during the descent they shone a bright light into the water, and they did not find anything like this at the time.

It's just that now that they are at the bottom, the surrounding environment is suddenly brighter, but they don't dare to go down rashly.

There is no such mound of earth as a miniature island in the middle of the lake, and the water is so deep that it is estimated that the mouth of the channel should be opened on the wall of the nearby river. But there is something in the water, and if you can't go into the water, you can't carefully inspect the banks of the river.

Ergou once again shone the bright light in his hand into the water, trying to see what it was.

Any one of the black shadows in the river is two meters away, and it can be four or five meters long. The thinnest one is about 20 centimeters wide, and it seems to have many pairs of gastropods.

Ergou couldn't help but mutter, "Why does this thing look so much like a giant centipede?" But centipedes can't swim, right? Is this another genetically modified centipede? ”

If it's really a centipede, it's troublesome, that thing is full of poison, such a large volume, just take a bite and explain it.

Hao Dong felt that this thing seemed to be a little familiar, although it was very large, but some characteristics were still obvious. It's just that he can't see clearly: "Ergou, can you put the flashlight closer to the water?" ”

Ergou couldn't help but tease him: "Yo, do you know?" Our little rats are getting better and better! ”

Having said that, he didn't stop in his hand, and the strong light tied to the rope was lowered more than three meters down, almost sticking to the water.

This behavior is actually very dangerous, just like fishing, in case something in the water jumps up and bites the strong light, it is likely to take the second dog directly into the water.

And those things below were obviously not unaware of their arrival, in fact, these black shadows had a tendency to gather in the direction of Hao Dong and them.

So Ergou didn't dare to put the flashlight in that position all the time, just put it down and shine it, and immediately recycled it.

However, this moment is enough for Hao Dong, whose eyesight has become particularly good now, to see clearly, and it is indeed that thing: "Ergou, have you ever eaten a sea centipede?" ”

There are many places where the second dog goes, and the things he has eaten are more miscellaneous, and the sea centipede has really eaten. But he hadn't seen the original. Listening to Hao Dong's question at this time, he couldn't help but gasp:

"A sea centipede down here? it! Lao Tzu is powerful enough, I have eaten this kind of thing! ”

I really can't blame him, the long strips at the bottom are really not good-looking. Not only is it not good-looking, but in fact it is quite hideous.