The height of 500 meters was equivalent to the height of a 100-story skyscraper before, not to mention a big living person, even a cat or a fish, and if you fall from such a high place, you can also fall to pieces.

Haoyu also glanced down a few times, and a trace of panic flashed on his face.

It is so high, and there is no soft ladder around, under normal circumstances, it is impossible for people to go down.

But all the footprints are gone here again, and it is clear that none of them have turned around, which does not make sense.

It can't really be as I joked just now, Director Hu, they grew wings and flew down, right?

All of a sudden, the atmosphere on the scene became depressing, and I knew that in this case, even if it was such an awesome character as Haoyu, he would be helpless.

Extraordinary places, extraordinary encounters, have to rely on extraordinary people.

And I'm this extraordinary person.

I took a deep breath and cautiously walked to the edge of the "cliff" again.

I wanted to lean out again to take a closer look at the hidden road below, but as soon as I bent down, I felt a stream of heat rush up from the darkness at the bottom of the pit.

Since I went down to the cave, I have felt a cool breeze and cold air, and this is the first time I have felt the hot airflow.

Hey? I didn't just wonder.

Stretching out his hand to feel it, he felt more clearly that this heat flow was constantly rising up, and it seemed that the power was not small.

It's hard to say that there's a hot spring down there—but even if there's a hot spring, it's not that hot, at least there's a crater to reach that much power.

Apparently there is no ...... below So how did this hot air force come into being?

Studied but cannot comprehend.

Suddenly, my mind fluttered, and I remembered how the hot air balloons rose - could this heat flow have something to do with their mysterious disappearance?

They were carried down by this thermal.

Give it a try.

I turned around and looked around, found a fist-sized stone, and threw it into a deep pit to make it free fall.

Under normal circumstances, at a height of five or six hundred meters, it only takes less than two seconds for such a large stone to fall to the ground.

In such a silent underground world, there should be a "bang" of stones falling to the ground.

However, after the stone left my hand, I waited for a full minute, but I didn't hear any movement from below.

"It's ...... What's going on? ”

Haoyu also noticed that something was wrong and asked me softly.

I sneered, "I think I've found a way for them to go down, but we have to verify it again." ”

"Huh?" Haoyu obviously didn't understand, "How did they go down...... How do you want to verify it? ”

I didn't explain, but picked up a stone of less than fifty or sixty pounds again and threw it into the pit again.

This time I waited for more than a minute, and I didn't hear an echo.

Fifty or sixty pounds of stone are fine...... The stone is dense...... In the same way, if a person is about 150 pounds, it should be fine.

To be on the safe side, I picked up a larger stone again and threw it into the pit hard, and this time after more than ten seconds, there was a slight "pop".

The sound was clearly out of proportion to the weight of the stone and the force I had just used.

This time I have determined that in the dark pit in front of us, there is an invisible buoyancy that is enough to make a safe fall to the bottom of the pit.

With joy in my heart, I hurriedly said to Haoyu: "Although I can't explain it clearly, it confirms one thing, that is, there is an invisible strong buoyancy from our location to the bottom of the pit, which can ensure that people go down to the bottom of the pit safely." ”

"Buoyancy?"

"How can there be buoyancy?"

Everyone was puzzled.

Haoyu suddenly pointed to the huge pit: "Don't you think it's strange!" How could there be such a huge pit underground? ”

One of the SWAT officers replied, "I found out just now, this should be an ancient crater." ”

"Lao Kong, you ...... Are you sure? ”

Everyone looked at the SWAT officer who spoke, and saw that he was about forty years old, which was the oldest among everyone.

"Sure! This is supposed to be a crater from ancient times. ”

Could it be that this magical buoyancy has something to do with the fact that this is a crater?

It's a crater again!

My mind flashed through my previous experiences in the cracks under the Yellow River and the thirteen ghost caves of the Yellow River.

Of course, it also includes the encounters in the 100,000 mountains of Zhangjiajie.

These places are craters, could it be that they have a relationship with each other?

A series of questions popped up "out of nowhere".

It's all about a magical prehistoric mystical civilization?

"What about the crater? Lao Kong, you are fascinated by astronomical knowledge! ”

The words of the other SWAT officer brought my mind back to reality.

"I want to give it a try!" Since all this is related to the mysterious ancient civilization, my faith has increased dramatically.

"Brother, how else do you want to try?"

Haoyu asked me.

"I want to be the first person to eat crabs." He smiled slightly, then walked to the edge of the cliff again, and turned around, "If I can reach the bottom of the pit smoothly, I will use the flashlight to switch on and off several times in a row to transmit the signal." ”

After speaking, he stepped out gently.

The feeling of weightlessness came instantly, and the whole body was uncomfortable, and after about a few seconds, it was obvious that the speed of the fall was much slower.

The whole person was surrounded by a stream of heat.

When we almost reached the bottom of the pit, the speed was incredibly slow.

The moment I landed, I breathed a sigh of relief.

Then he quickly took out his flashlight and pressed the switch on it a few times, and then there was an intermittent light from above.

Five minutes later, everyone had landed at the bottom of the pit without incident.

More than a dozen people, including Haoyu, were all amazed.

"For a moment now, it was as if the earth's gravity had failed......"

"I felt a force carrying me...... In short, it feels weird. ”

I don't bother to talk with them.

Because I could smell it, the pungent smell of cement was even stronger.

I was sure that the smell was coming from the towering building in front of me, and a sense of foreboding came to mind.

"What do you think of again?"

Haoyu may have seen that I had something on my mind, so he leaned over and asked softly.

"I think this place is weird!" I replied softly, too.

"yes!"

"When we got out of the cave, there was no cell phone signal, and even the super strong Beidou-1 compass we prepared was out of order...... It could really be related to meteorites. ”

"I'm not talking about this - Brother Haoyu, you didn't smell a smell of cement?"

Haoyu sniffed vigorously and shook his head: "I didn't smell it—why, can you smell cement here?" ”

"That's right! And it's very thick, there should be a lot of concrete buildings - actually...... Actually, I can't figure it out, even if it's a concrete building, thousands of years have passed, and it shouldn't have such a strong smell! ”

"This place...... Wonder no more! ”

The group took a break while discussing plans for this step.

Sure enough, more than ten meters away from us, we found the footprints left by Director Hu and them again.

Anyway, here's the good news!

Set off again and follow the direction of the footprints, which happens to be the direction of the towering building.

I noticed that there was a stone path underneath my feet, which was clearly a masterpiece of man-made.

The stone slabs are made very regular, and they are all rectangular about one meter long and sixty centimeters wide. The error-free chapter of "River Patrol Trickery" will continue to be updated on the ninth Chinese network, there is no advertising on the site, and please collect and recommend the ninth Chinese network! If you like river patrol tricks, please collect them: () The ninth Chinese network of river patrol tricks is the fastest update.

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