Grunt!

Feng Daoqi couldn't help but swallow his saliva.

Aside from the problem with the echo, what made him feel most wrong was that they had walked down the stairs for so long since they entered the stairs, and then turned back and climbed up.

Now it's been such a long way down.

Turning back and forth so many times, the number of stairs climbed was at least dozens of floors.

However, he didn't feel the tiredness he should have.

You must know that under normal circumstances, if you climb a height of six or seven floors, you will feel sore and weak.

But after dozens of layers, he only felt a little short of breath.

I didn't feel any soreness in my lower back, abdomen and legs, and I didn't feel tired as I should be.

That's even weirder.

Thinking of the key point, Feng Daoqi stared around carefully, and then made a strange move.

"Anyone?!"

Suddenly, Feng Daoqi shouted into the corridor.

"What's going on?!"

Seeing his strange behavior, Zhang Yingxue hurriedly asked, and several other people were also confused.

But Feng Daoqi didn't rush to explain, but listened carefully to the movements around him.

Sure enough, there really was no echo...

He was even more sure now, in such a long corridor, there was no echo when he shouted?

Coupled with the fact that he didn't feel tired, and he could never get out of this corridor, so many weird things were mixed together. He suddenly thought of an unbelievable possibility.

So, Feng Daoqi hurriedly drew his dagger, and then vigorously carved an asterisk mark on the wall on his left.

When he had finished the mark, he breathed a sigh of relief.

"What the hell is going on?" At this time, Zhang Yingxue finally couldn't help but ask.

Feng Daoqi wiped the cold sweat on his face, and then said solemnly: "I just calculated the distance we have taken, and since entering the corridor, we have gone down to a depth of almost eighteen floors, but according to the ability of the people of the Qin Dynasty, is it necessary for them to waste their strength to dig so deep without heavy tools?" ”

This...

Hearing his words, Zhang Yingxue and the others were also very smart, and they immediately sensed the key point of the matter.

He Hongbo frowned, and immediately said, "You mean to say that this corridor is not as deep as we thought?" ”

"Not all right!"

Feng Daoqi said firmly: "I mean, we may have never left this range, but have been repeatedly circling around these stairs!" ”

Beat around the bush?

Hearing his words, He Hongbo was immediately stunned.

"However, we have been going down from beginning to end!" At this time, Yang Shurou was also a little incredulous.

That's right.

They really keep going down, and even if they want to go around and come back, it's impossible!

So, how can it be that you are going around in circles?

Hearing this, He Hongbo also nodded and said: "That's right, if we have been going around in circles, then this situation should appear in the case of horizontal comparison, and it can't be in the corridor going down?" ”

Several members of the archaeological team had heard of something similar before.

Many people get lost in the wilderness or have been walking in circles in a range and can't get out.

The reason for this is that the ground in such areas is flat.

A person's two legs are actually one long and one short, so when the surrounding environment is very similar, it is possible to go around in circles in the same place all the time.

However, they are pretty sure that they are going down all the time.

The stairs that you can never get out of...

Could it exist?

But just when a few people were puzzled, Zhang Yingxue bowed her head and said nothing, and she never spoke.

She felt familiar...

She seems to have heard of this situation somewhere, as if her brother had done some experiments and models before!

It's just that I didn't care at the time...

It was at this moment that seeing the doubts of Yang Shurou and the others, Feng Daoqi suddenly said: "That's right, we have indeed been going down... But think about it carefully, Yingxue, when you shouted Zhao Ruixue in the corridor before, did you hear an echo? ”

Echo?

Hearing this, He Hongbo was stunned.

Recall carefully, they really didn't hear an echo.

"That's the biggest doubt!"

Feng Daoqi continued: "We should all know that the principle of echo must be very wide or long in order to be formed!" And judging from the distance we have walked before, this corridor should look very long! ”

"But in such an empty corridor, there was no echo at all... There's a ghost! ”

Grunt!

Hearing this, He Hongbo swallowed his saliva.

Now that I think about it, that's exactly what happened.

It's just that he was too nervous before, and he didn't even notice it, but now that he thinks about it, even if he shouts in his own corridor, there will be an echo!

Only then did he understand why he shouted inexplicably before Feng Daoqi!

It turned out that it was to test the echo principle!

It seems that this descendant of the Guanshan lineage is indeed not simple, and even Yang Shurou's eyes when she looked at him have changed.

"In addition..."Thinking of this, Feng Daoqi suddenly asked: "You guys feel it carefully, do you feel tired?" ”

Tired?

Hearing this, He Hongbo didn't know what it meant.

But he still felt it carefully, and found that he really didn't feel the tiredness he should have!

So, he was immediately surprised: "What's going on?!" It stands to reason that Lao Wang and I are over half a hundred years old, and we will be out of breath when we climb three floors. We've gone down so many floors, why do I just feel a little tired, but not tired at all?! ”

He Hongbo was so surprised.

What the hell is going on?

However, Feng Daoqi was waiting for this answer.

So, he immediately said solemnly: "This is what I find strange, it stands to reason... Even if you two professors are exercising for a long time, after all, you are so old that it is impossible not to be tired. ”

"After we came in through the entrance, we went up so many floors, and then we went down eighteen floors!"

"Even if it's me, I'm going to be tired... But you two didn't even feel weak in your legs, so there's a ghost! ”

What?!

Suddenly hearing this, several people present were stunned.

Yang Shurou said in disbelief: "You mean that we are not going down or climbing up, but all the time going around in circles on a parallel ground plane?!" ”

Grunt!

Hearing this, He Hongbo immediately swallowed his saliva.

After all, who would have thought that this staircase, which has never been able to get out, would be like this?

In this regard, Feng Daoqi nodded and said: "But all this is just my guess, so I left a mark to see if my guess is accurate." ”

"Let's keep going, and if you can still see this mark, it means that my guess is correct, we haven't gone down all along."

Hearing this, several people present understood.

So, several people suppressed the fear in their hearts again and walked down cautiously.

For a while, several people present held their breath, and the netizens in the live broadcast room were afraid of missing any shots.

Second floor!

Third floor!

Every time they went down the first floor, several people were calculating in their hearts, and when they finally reached the corner of the fourth floor, Feng Daoqi also cautiously used a flashlight to look at the wall where he had left a mark before.

But after he saw the situation on the wall clearly, Feng Daoqi himself was stunned.

[Let's guess what's going on? 】