Under the illumination of three flashlights, what was presented in front of the three of them completely subverted their worldview!

Yu Fei and the three of them are now on a fork in the road, with a cave on the left and right, all of which are very spacious. The tunnel is at least five meters wide and six meters high, and continues in an arc to the front on both sides.

What they saw was in the cave wall in front of them.

The reason why it is said to be in the cave wall is because it looks like the flesh of a mussel shell is squeezed out of its shell. And what the three of them should see is only a small part of it, because there is no head in sight on either side!

It's not a good thing to describe. Just looking at the exposed part of it, it looks like the skirt of a huge loaf of bread, the outer edge is curved, the height difference from top to bottom is estimated to be about three meters, the upper side obliquely submerges into the cave wall, and the lower side is a plane, about one meter six or seven above the ground.

The protruding part is about one meter, and the whole appearance is gray-brown, covered with various complex patterns or lines, and glows with a faint metallic luster under the action of light!

If you look at it a little more, it looks like the cave wall is producing bread, but only one edge is squeezed out.

"What is this?" Yu Fei stretched out his hand and wanted to touch it.

"Stop!" Liu Can grabbed him, "Big brother, don't touch anything as soon as you see it, this is not a beauty!" ”

"Looks like a discus!" He Qiang muttered. "Could it be the prehistoric movement of the earth's crust? Maybe it was a huge vein of metal that melted the metal into a single piece when the magma poured out of the ground! ”

"Your discus is so big?!" Liu Can glanced at him a little angrily: "Big brother, is it a little common sense!" It's definitely man-made! Besides, can the movement of the earth's crust create such an orderly pattern on the surface of this thing? ”

"But who would make such an iron lump in this hellish place? It can't be Yu Zhenxing, right? Yu Fei wondered.

"I think this is Yu Zhenxing's masterpiece, this must be his secret laboratory!" He Qiang patted his head.

"It's hard to say, it's not easy to build something like this huge underground! You see, is there a gap between it and the wall of the cave? Liu Can said with a flashlight shining a flashlight on the junction between this thing and the cave wall.

"He has money, so it shouldn't be too difficult, right?" Yu Fei found that there was almost no gap between this thing and the cave wall, but he couldn't accept it in his heart.

"I said, big brother, this thing doesn't look like it's installed, how can it fit so tightly! This is the least mechanical common sense! "The black line on Liu Can's end.

"Then tell me, what's going on with this Nima?" He Qiang was a little unconvinced.

"It's hard to say, let's wait until I read it before I draw conclusions." Liu Can smiled.

"What now, there is a passage on the left and right, which way to go?" He Qiang asked.

"The metal sand on the ground is still there, let's continue." Liu Can said.

The metal sand went along the tunnel on the left, so the three of them turned left and entered.

The tunnel is not straight, the three of them can roughly judge from the walking route and feeling that it should be an arc, and there is a fork every three or four hundred meters, which is very symmetrical, and each fork is almost exactly the same!

However, the forks were on the left side of the cave where they walked, and the right side was still the same as when they entered, with a piece of metal exposed.

After walking for about half an hour, the metal sand on the ground disappeared, and the disappearance was also in a strange place, and there was a fork in the road on the left.

Seeing this, the three of them stopped.

"The metal sand is gone, what should I do now?" He Qiang has always had a lot of problems.

"There are two possibilities, one is that the metal sand on that person's body has run out, and the other is that this should be the last corner!" Yu Fei is sure of the authenticity.

"How do you know this is the last corner?" Liu Can rolled his eyes, obviously not agreeing with Yu Fei's words.

"To remind his latecomers, of course!" Yu Fei also gave a roll of his eyes in return.

Liu Can smiled and said, "Since this person wants to use metal sand to guide the way, it means that he shouldn't have been here before, then he can't be sure that this is the last corner!" ”

"You mean the former possibility, running out of sand?" He Qiang said.

"There's another possibility." Liu Can rolled his eyes again.

"What is possible?"

"He doesn't need to use metal sand anymore!" Liu Can said word by word.

"Cut, nonsense!" He Qiang's face was full of disdain, and he sneered: "What is the difference between this and Yu Fei's second judgment?" ”

"It's a big difference!" Liu Can chuckled and continued: "If this is the last corner, then you have to go into this fork, which means that you haven't reached your destination yet." And my judgment is that this is the destination! ”

"Hold the grass, Ya is too good at breaking nonsense, except for this fork in the road, unless you go to the front, do you want to use the wall piercing technique to go directly through the cave wall?" He Qiang was already laughing.

Yu Fei didn't speak, he began to check around with a flashlight, but found nothing.

"Can you guarantee that there won't be any secret doors or anything like that?" Liu Can was a little speechless. "And, don't you think it's too coincidental that the metal sand runs out at this fork?"

"You two don't quarrel, there is no secret door here, I think it's still the first possibility, that person's metal sand is used up!" Yu Fei stopped the two from continuing to argue.

Then, after a few more discussions, the three of them decided to use the protruding metal object as a reference and continue their search.

After walking for more than half an hour, the careful Yu Fei found metal sand again.

This time, however, the sand went to the fork on the left.

"Haha, it's finally there again!" He Qiang shouted happily.

"Let's go, to the left!" Yu Fei was also a little happy, and walked to the left first.

"Wait!" Liu Can immediately stopped him.

"What's wrong with that?" He Qiang was a little dissatisfied, because he knew very well that if it dragged on like this, it would take longer, and it would be even more difficult to find their captain at that time.

"Look here!" Liu Can had already squatted down. "There's also metal sand in the tunnel ahead!"

"Hold the grass, what's the situation?" He Qiang also hurriedly squatted down to look.

"No, this should be where we came in!" Liu Can quickly made a judgment.

"Damn, all these forks are almost the same as a bird, how do you know this is where we came from?" He Qiang was puzzled.

"Big brother, your logical thinking is still in the kindergarten stage." This time it was Liu Can's turn to laugh. "We're following the man's route, and if the direction is right, he can't have sprinkled metal sand where he hasn't been!"

"It's simple, maybe they've gone over the beaten track and then folded back!" He Qiang retorted.

"You're going to be bored to play in circles!" Liu Can continued: "Since that inner ghost is following up, and the person leading the way doesn't need any signs, of course, he knows everything here, how can he go over!" Besides, that inner ghost wouldn't be stupid enough to scatter sand indiscriminately, doing so would obviously mislead those who came after him! At that time, his latecomers will not be completely confused! ”

"Liu Can is right, this is where we came in!" After taking a closer look, Yu Fei calmly made a judgment: "From the perspective of our deflection, we should be following this cave in circles!" Moreover, this also explains the reason for the appearance of metal sand in front of us and on this fork in the road! ”

"Or are you smart!" Liu Can said with a smile.

"To put it this way, this 'discus' is too big!" He Qiang's eyes widened.

"Yes, judging by the speed of our walking, it is at least a thousand meters in diameter!" Yu Fei sighed.

"What now?" Liu Can wrote and looked at the two of them.

"If you continue, it's still going around in circles, I think, you have to go back to the captain quickly!" Yu Fei said slowly.

"We've teased such a big circle here, it is estimated that Yu Zhenxing has been alarmed, if we go back together, he will definitely slip away!" Liu Can took a deep breath and continued, "And this cave path is obviously the only way for them!" ”

"I see what you mean!" Yu Fei nodded and said, "In this way, you two stay here, and I'll go back and inform the captain!" ”

"Are you alone?" He Qiang was a little worried.

"Don't worry, I don't have a guy in my hand!" Yu Fei smiled and patted the gun in his arms.

"I think you'd better hurry up, I'm cowardly, if something comes out of it, don't blame me for running fast!" Liu Can said in a weird way.

"If you dare to run again, I will definitely break your legs!" He Qiang glared at him.

Who knows, Liu Can didn't bird him at all.

"Alright, be careful, I'll be back as soon as possible!" With that, Yu Fei turned around and ran towards the way he came.