Now, Li Yunmu can't wait forever, he finally took the first step, that is, to face the cave and unlock the secrets hidden in its depths.

When Yan Ya and the others set off for five bells, Li Feng and Li Mei, in pairs, immediately entered a state of shadow retreat, followed the shadows of the four people, and silently advanced to the depths of the cave.

Subsequently, Li Tian and Li Di followed behind Li Feng and Li Mei across the distance line of 500 meters, and after 500 meters, Li Zhu and Li Lan followed behind Li Tian and Li Di.

Li Yunmu used this arrangement, and he followed Li Ju far behind, in general, in this way, the real distance between Li Yunmu and Yan Ya was two kilometers apart.

It's a distance that is safe enough to have enough time to deal with everything.

However, this time, no one thought that he would follow him for several days, but according to the information and intelligence sent back by the shadows in front of him.

Obviously, Yan Ya and the others still haven't reached the end this time, and the depths of this cave are obviously deeper than everyone guessed and imagined.

This time, the system also followed Li Yunmu into the field, and naturally made all the information accurate to the extreme.

In a few days, everyone entered the cave and had walked more than 200 kilometers, and the system permanently entered the shape of the cave into the map as they walked.

When Li Yun looked at the sea of consciousness and saw that the system had accurately described the topographic map that everyone had walked, his heart suddenly sank.

"Is this a paper diagram?" Li Yunmu was shocked.

"Yes, in fact, we are going in circles all the time, slightly downward, but because the circle is too large, so from the feeling alone, we are going straight, and we don't feel going down at all. ”

Soon, the system collected the topographic map that everyone had walked on, and listed the data collected by the system: "But in fact, we are all going in a circle downward, and now we have actually circled down three and a half times, and now our current position is about three hundred meters down from the ground. ”

"Then what conjecture have you come up with?" Li Yunmu perked up when he heard this, and he had to say that with the system, these perverted Paper-Shape Passages that could have bullied the human senses were all gone.

"According to all the curved passage diagrams that have been walked through so far, as well as the position of the center marker, if we continue to walk in this state until we reach the exact center position and achieve the overlapping position, we will need to cover a total of 3,666 kilometers. ”

"Shhh After listening to the specific figures, Li Yunmu couldn't help but scold the pervert of the person who designed this crypt, this is simply playing with the dead.

If there is no system, then everyone will think that they have been going deeper, but the cave is very deep and needs enough depth.

And because on the bright side, there are no other forks in the road, so there is no labyrinth, deliberately misleading people from the beginning, just keep walking, the cave passage will always have an end.

However, in this case, the problem arises.

If we deduce according to the parameters that the system has walked out, and the whole distance is reached, and the central position below the ground coincides, then it is more than 3,600 kilometers in total.

How far is that?

If in the earth world, there is no super gravity suppression, flying in the air on the ground of the earth, then with Li Yunmu's wind wing speed, it can be reached in a few hours.

But this place is different, not only is there a super-heavy gravity, but the environment is also an unknown dark and lonely underground cavern that makes people always need to be vigilant.

If he didn't know what the distance was from its end, as long as he thought about it, Li Yunmu couldn't help but shudder.

It's definitely a test of willpower.

Because when you keep walking, without perceiving the circle of going up, you keep walking, but you find that the cave has no end and no exit, then at this time, people will often have doubts about their own thinking and decision-making.

And this suspicion will grow with time, and the environment will become more and more oppressive, and it will be rapidly amplified.

Therefore, if the system had not speculated the results in advance, Li Yunmu would also doubt that if he faced this unknown situation, he would have given up his original intention and planned to turn around and leave here forever and never come back.

The distance of this U-turn may be more than 2,000 kilometers, or even 3,500 kilometers, or even more exaggerated, it may be 3,665 kilometers, and it is only one kilometer away from reaching the end of the line.

But because of the doubts in my heart and the psychological influence of various bad environments, people who come in will eventually retreat.

Sure enough, the next scene.

Seriously verified Li Yunmu's conjecture, when the four of Yayan walked out of more than 20 miles one after another, their walking speed dropped significantly.

If the first 300 kilometers were deep, they would still be able to achieve a speed of 60 kilometers a day, but after completing this section, the speed at which they explored would drop in an instant, and they would only advance about 20 kilometers a day.

The speed of travel has dropped by nearly three times.

Why?

Because they have now completed all the known sections of the road they first explored.

As they moved forward, they were all unknown and inexperienced exploring dangers, so they deliberately slowed down, their nerves tensed again, and they were careful to move forward.

If you continue to walk at this speed, trying to complete the 3,600 kilometers of cave passages will be a fool's dream.

Because humans are not robots, Li Yunmu can expect that the longer the time passes, Yan Ya's various mental and physical functions will have fatigue and various problems, and their speed will continue, becoming slower, and there may even be frequent rests and stops.

If there are many people, there may even be disputes over whether to move forward or return.

"It's really a big test. Li Yunmu sighed, suddenly raised his hand, and made a stopping motion, at the same time, through his telepathic contact with the shadows, he also found the order to summon all the shadows to return.

The next moment, more than a dozen seconds later.

Li Feng, who was far ahead, all walked out of the shadows behind Li Yunmu again, and they all looked at Li Yunmu silently, wondering why the master was not in any danger, but he recalled them to his side.

"No need to follow, I've found a quicker path to the end. Li Yunmu gave an explanation to his shadows.

The next moment, he had retrieved a large egg.

A drop of essence blood landed on the giant egg, and it didn't take long for the giant egg to shine continuously, and the last thick beetle with huge pincers crawled out of the eggshell.

That's right, this huge guy beetle, that is, the giant beetle that Li Yunmu exchanged for in the Tower of Glory a long time ago, it is a rainbow-level monster, but because of its clumsy and inflexible movements, it has no damage.

Born with thick armor and thick flesh, infinite strength, good at digging the ground, and has been supported by Li Yunmu in the astral boundary, because it has a very outstanding special role.

Therefore, Li Yunmu also attaches great importance to it.

Therefore, the giant digging beetle in front of me has changed significantly compared to that time, at least, it has become stronger and more powerful now.

In terms of strength alone, it has even broken through the rainbow-level dimensional monster, and now it is now a super-string insect beast monster, which is very simple, because Li Yunmu has fed it a total of three drops of divine blood in order to cultivate it.

When this big guy with a head of twelve meters and a house appeared in front of them, Li Yun and the others finally understood what the shortcut path was that their master was talking about.

"Target, three thousand meters underground, dig it, big black. ”