If you want to turn us upside down when we don't feel it, there is a possibility that it is the roller. We walked into a roller, and as we walked forward, the ground rolled. But this doesn't make sense, because if it's a roller, what we go in and what we should come out of, it's impossible to see everything upside down.

There is still one possibility left, that is, the tunnel has not changed, gravity has changed, and gravity has been artificially changed, not to mention Cao Cao, even if Nuwa came, it would not be possible at all, but the qiē we experienced was so real, and it was there, if you wanted, you can experience it again at any time.

Everyone thought about it for a long time, but to no avail, I took a saber from Zhao Tiesuo and drew a sketch of the Yongdao on the floor, and after the drawing, I felt that it was the shape of a bullet.

Yan Qiu stared at my sketch, looked at it vigorously for a long time, and burst out: "I understand." ”

It's like a super difficult riddle, someone has come up with the answer, and we pricked up our ears and waited for Yan Qiu to reveal it.

Yan Qiu pointed to the sketch and said, "There is only one truth. "This girl really has a childhood, and Conan's lines also came out.

We didn't have time to complain about her betrayal, but we still looked at her with longing eyes, waiting for an answer.

Yan Qiu smiled and said, "It's magnetite, do you know where this Xia Qiyuan Village is?" ”

Everyone shook their heads.

I said, "Isn't it in Hebei?" On the edge of the Zhanghe River? ”

Yan Qiu continued: "In Ci County, magnetite was produced here in ancient times, so it was called Ci County. ”

The fat guy asked, "And then?" ”

Yan Qiu also said: "The design here should be the magnetite outside the guò wall, whether it is man-made or it itself is zài, the magnetic field of this magnetite and gravity form a counteract, which will make us feel weightless inside, and at the same time greater than gravity, so we will not have the feeling of head down." ”

The communication between cultural people is so smooth, I have already understood Yan Qiu's explanation.

Some people are still a little confused, especially the fat brother, whose expression is more confused than when he didn't know the answer to the mystery before.

What Yan Qiu said is nothing more than that this is Ci County, there is magnetite, and the Yongdao we entered, the periphery is reasonably arranged with magnetite, and the magnetic force is greater than the gravitational force, so that when we change the terrain, we still feel that we are upright under our heads and feet. It's as if the earth is round, but people all over the world don't feel like they're standing on a sphere.

It was much easier to get the answer, and I hurriedly asked Yanqiu, "How did you come up with it?" ”

Yan Qiu said, "Didn't you think of it earlier? Still ask me? ”

Confused, I asked her, "What do you mean?" I didn't expect it, I'm confused. ”

Yan Qiu looked at me with wide eyes, then pointed to the sketch on the ground and said, "Didn't you draw a maglev train?" That's the theory, the maglev train is to cancel the gravitational force through guò magnetism. ”

I was stupid when I heard it, my life was completely ruined in my own hands, not only did my brain not be flexible, but even my painting skills were so poor, I was obviously drawing a sketch of the road, but I was actually regarded as a locomotive. I didn't explain, but smiled incomprehensibly to hide my ignorance.

After understanding the principle of the generation of Yongdao, I began to ponder the thinking of the designer. What did he mean to design such an abrupt structure? And it must be painstaking, is it just to make us have fun? Definitely not.

I said to the crowd, "Why did the owner of the tomb make such an aisle?" It's not going to be just for us to play, is it? If you find the reason, you will definitely be able to get out, I suspect this is a puzzle, let's solve it. Then I set my eyes on Yan Qiu again, expecting her to give us another reasonable answer.

Yan Qiu really lived up to expectations, and said a minute later: "The ancients are so great. ”

Everyone was puzzled, and Sister Hua said: "It's really great, I don't know if I'm smart or stupid to repair my tomb so perverted." ”

Yan Qiu smiled and said: "In 1839, the French made the first portable wooden box camera, and the camera is the inverted imaging technology. Cao Cao died in 220, but he did not expect to discover the principle of photography long ago. More than 1,000 years before Europe, it's great. ”

I almost didn't spurt out a mouthful of old blood, but this time I'm sure she thought too much, and pulled out the camera, and even made the statue, and made an inverted image, so that we can enjoy it from the perspective of the camera? I dismissed her analysis, and then everyone went back into contemplation.

When I went in, I looked back at the gazebo, and when I got to the end, I climbed up and saw the pavilion upside down, and so on several times, but I didn't have a clue.

Everyone seemed to have given up thinking a long time ago, and Zhao Tiesuo lay on the ground and began to nap.

The fat brother was standing in the Yongdao crossing, bouncing around.

Just when I was about to give up, I suddenly thought of the word "cycle", from the beginning of the eight-character Yongdao, which is a continuous cycle, and here it is a cycle back and forth, and the tomb builder must have expressed this cycle. Looping means starting from the beginning, the beginning is the end, and the end is the beginning.

When I went in, I saw a gazebo, and when I came out, I saw a gazebo, which started here and ended here.

I completely understood, and hurriedly said to everyone: "Cao Cao wants to express that the war during the Three Kingdoms period began here and ended here. ”

The crowd didn't seem to understand.

I continued to explain: "From here on, it means that Cao Cao saw Liu Bei's ambition at the beginning, he didn't kill Liu Bei, he deliberately wanted to compete with Liu Bei, and the real war began with the meeting in the pavilion that year. It ends here, which means that in the end, Cao Cao's remains are placed in this underground world, and this is Cao Cao's safe place, which is Cao Cao's tomb. ”

This explanation is obviously easier to understand than Yan Qiu's, and it seems to make sense, and everyone understands it as soon as they hear it.

The fat brother followed my words: "The beginning is the end, starting from the gazebo and ending at the gazebo." There must be an exit to that gazebo. ”

When he said this, it was even simpler, and the riddle was for us to guess.

Without saying a word, the fat brother walked up to the gazebo and began to release his desire to destroy, breaking here and there, for a long time. At last he turned the table and picked up a round floor with a well underneath.

The crowd was ecstatic, and when there was no way out, this was a historic discovery.

We ran to the well in the center of the pavilion, Zhao Tiesuo used a flashlight to shine down, the well is not very deep, about ten meters, on the wall of the well made of bluestone bricks, down is a row of U-shaped iron ladders. Without thinking, we went down the ladder to the bottom of the well with both hands and feet.

At the bottom of the well is a long tunnel that stretches forward, and with a flashlight you can only shine into the darkness, with no end in sight. The tunnel was so narrow that we had to walk on our knees, and the fat guy was so big that we had to bend down so that our backs wouldn't hit the top of the cave.

Every ten meters, there would be a well the same as when we came down, and we all crowded into it to rest, and after resting, we continued to climb, grinding my knees so hot that both of my knees hurt.

Lu Shan must have been unable to stand it for a long time, and it was really unbearable to let such a delicate girl suffer with us.

When it came to the next stop, I took off my T-shirt, helped Lu Shan tie it around the knee of one leg, and told her to change her leg next time she rested, so that it would be better.

While I was tying up, Lu Shan complained to the fat brother: "Fat brother, are you looking for an exit?" Why do I feel like a sewer? Is it a mistake? It doesn't feel like a road for people to walk. ”

What she said also made me smart, it couldn't be that there was some monster hidden here, right? Dedicated to guarding here? But after thinking about it, it's impossible, if there are monsters here, then you have to hide the wellhead? It should be accessible to monsters. And there is an iron ladder in the well, so do monsters need to climb ladders too? So what is the use of this passage? I have reason to believe that if we climb any further, we will find the answer.