In the depths of the dark cliffs, a group of people slowly crawled on the two bucket-thick iron chains, like two earthworms that had been cut into countless pieces struggling and wriggling.

The chain was about 100 meters long, and soon everyone climbed to the other side of the cliff.

"I'm top, why isn't it? Yan Zai! What's next! ”

Looking at the bare cliff at the end of the chain, everyone had to stop.

Yan stood up on the iron chain, swaying his hand and touching the stone wall,

"Strange ......"

There was a muttering in his mouth, and then as if he thought of something, he stuffed the backpack into the hands of Boss Zhang behind him, and his legs hooked the iron lock upside down and turned it over.

Click......

I don't know what Yan is doing below, but I can hear the friction between the machine and the boulder, and the rock wall above the iron chain actually collapsed into a piece, and then there was a clattering sound, and the sealed stone that was sunken in was slowly pulled up, revealing the dark passage behind.

"There's a stone staircase in there!" Chen Tao used a flashlight to shine on the depths of the passage.

"Will there be a mechanism?" Boss Zhang held on to the stone wall with one hand, leaned over and looked inside.

"Don't go in if you're afraid of death!"

Yan didn't know when he flipped up, took the backpack in Boss Zhang's hand, and bent down and climbed into the passage.

"......Forehead" Boss Zhang was slightly embarrassed, staring at Yan's back with a gloomy face, and an imperceptible look flashed in his eyes.

"What are you doing, waiting for me to bring you in one by one?" Yan, Lao Tzu, the first in the world, you are all rookies, and the voice came from the cave.

"Let's go, come, Ah Cheng, you first!" Uncle Long took care of Ah Cheng, who was carrying Uncle Wang on his back, and climbed into the cave, and beckoned Chen Tao and the others behind him.

The cave was dry, not as damp and gloomy as expected, and there were no vines or black insects around, and there was a faint breeze blowing from the depths.

The diameter of the cave is about three meters, and there are still traces of artificial excavation on the walls of the cave around it, which are full of large and small chisel marks.

The ground is covered with a layer of large and small stone slabs, and there is no pattern at all. A few meters ahead is a stone staircase leading to the top, about a meter long, which is directly hewn out, and does not look dangerous.

When Chen Tao and the others came in, Yan was squatting on the ground and tapping the stone slab on the ground with the back of his hand, making a dull sound.

"Could it be that there is a mechanism down here?" Chen Tao thought.

It is really strange that such a deep hole is paved with this kind of stone slab only in this section. He had seen it more than once in TV novels before, and the ancients always liked to hide the mechanism under this kind of stone slab, and as soon as a person stepped on it, he would activate the mechanism below, and he didn't know how to die.

"How's it going, can you get over?" Uncle Long asked.

"The slabs are solid underneath...... What to do, play psychological warfare? Yan frowned and looked at the stone slabs.

One after another, people crawled in from the entrance of the cave, Ye Rong and the others had more than a dozen people, and the space in the cave was too small to accommodate them at all.

"If you don't have a mechanism, let's go, be careful." Uncle Long said.

Chen Tao looked at those stone slabs, and didn't take a step for a long time, these stone slabs made him feel very strange, a patchwork of large and small, how did he feel a bit like a top view of a place?

Hesitating, Chen Tao took out his mobile phone and took a picture by the light, I don't know why, the combination and arrangement of those stone slabs attracted him very much.

Whoosh ......

There were suddenly several sounds of breaking the air around them, and several spears shot out from the stone wall at the entrance of the cave, and the last two or two people of the crowd were instantly pierced in the heart, and the spears pierced through their bodies, and with two muffled snorts, they vomited blood and fell to the ground.

There was a commotion in the crowd.

"Don't move! It's a trap! Yan stood on a stone staircase and shouted, "MD, careless! That kid from the male loser, it's about to break it! ”

"Oh Yanzai, you hurry down and save me! Is that hairy boy unreliable? ”

"He can't move." Haozi said, "It's because he's there that we haven't been pierced into hedgehogs with spears." ”

"The mechanism here isn't under a stone slab, it's the whole ground and the stone staircase."

Haozi pointed to the stone staircase where Yan was standing and said, "As long as someone goes up the stone staircase, the mechanism will be quietly activated." The staircase and the slab on the ground were like balance beams, and as soon as someone left the staircase or the slab area, the spears would kill all of us at once. ”

Hearing this, Chen Tao looked at the two corpses on the ground, maybe they shouldn't be called corpses now, the people were still panting, but they couldn't live long.

The position of the two of them is just outside the range of the stone slab, and now a few people on Yan's side and Haozi and their side just maintain a balance, and no one dares to move, not even the atmosphere.

The only one who was not in the agency was Chen Tao, who was still stunned at the entrance of the cave after taking a photo.

"There is only one way to break this mechanism. If we ignore the environmental disturbances here, we are now just rocks on both sides of the seesaw. Don't move, Redhair, you follow my steps, keep your balance, he can't do it alone, I have to go out and help him. Taozi, you do what I said, go find the crack switch. ”

Everyone's eyes looked at Chen Tao at the entrance of the cave.

Nima ......

Is there any other option?

Is there a possibility that the mechanism has fallen into disrepair and has broken down?

If you don't do it, you're going to die, big brother!!

The concubine can't do it, I !!

Looking at the twenty or thirty people in the cave, Chen Tao was suddenly under a lot of pressure, and sweat came out of his forehead.

"Okay Taozi, listen to me, if I'm not mistaken, there are two control mechanisms here, and the location is in the stone walls on both sides of the cave entrance, you can look for it."

Looking at the pitted stone walls on both sides, Chen Tao couldn't help but feel a little big.

Nima, how do you find this?

Thinking of the sunken sealing stone on the stone wall when he came in, Chen Tao's eyes lit up.

Could it be ......

He walked to the stone wall on the side, stretched out his hand and carefully touched the stone wall. The stone wall is very icy, and there is a slight moisturizing feeling to the touch, and I don't know what kind of stone it is.

If that so-called switch is really under the stone wall, then it must have a gap, no matter how big it is.

When Haozi unlocked the gossip chain, there was almost no seam on it.

Chen Tao does not have the ability of Haozi, he can sense the gap of the mechanism with his fingers, and he can only use the most basic and effective way to find it.

Knock Knock......

Chen Tao knocked on the stone wall inch by inch, piece by piece, and finally, in a very inconspicuous corner, there was an empty muffled sound from the stone wall.

It is a slightly recessed stone, which is also pitted, and it is the same as the surrounding stone wall, and there are faint traces of cutting around it, and you can't notice it at all if you don't pay attention.

Chen Tao gritted his teeth, took out a folding shovel and inserted the blade into the thin stone crack, and buckled the stone out little by little.

Really......

This stone is an empty shell, and the back is empty!

Through the light, Chen Tao saw that there was a depression in it, and there was an iron ring buckle the size of a fist in the depression.

"Yes, that's it! If I'm not mistaken, the other one is on the opposite side in the same spot, and you go find it. Haozi shouted behind him, "Red hair, go down the steps, Uncle Ghost, get ready to go out!" ”

People with common sense of physics will definitely understand that if two objects, one heavy and one light, want to maintain balance on both sides of the fulcrum, they can only make the light end farther away from the fulcrum and the heavier end closer, which is the so-called lever principle.

And this principle was already mentioned by the Mohists thousands of years ago.

In "Mozi Jing II", it is said, "Balance must be correct, and what is said is gained." Balance, heavier on its side, must be beaten, the weight is not similar also, balanced, then the short standard is long, two additions, the weight is similar, then the standard must be down, the right to bid also".

When Chen Tao was looking for organs everywhere, Haozi had been estimating with Yan that after a person went out, Yan would have to go down a few steps. And the mountain ghost is the closest to the edge, and it is about the same size as Yan, so it is the best candidate.

On the other side, Chen Tao was in the same position on the opposite stone wall, and sure enough, he found an identical iron ring buckle.

The mountain ghost came out of the stone slab and walked to the opposite wall, bent down and grabbed the iron ring: "Little boss, I'll count one, two, three, let's pull together!" ”

Chen Tao nodded, his hands clutching the iron ring tightly.

One

Two

Three

Click-la-la-......

As the two of them worked together, the iron ring buckle was pulled out of the depression, and under the iron ring was connected an iron chain, which was followed by the expansion of the control mechanism.

Giggles......

The sound of the machine expanding and rotating and the boulder rubbing echoed in the cave, and with a loud bang, the sealing stone at the original entrance of the cave actually fell down again, blocking the entrance of the cave again.

"Damn!"