"You should know Einstein's theory of relativity, right? You've all taken the subway, right? There are mobile advertisements on both sides of the subway tunnel, but we can clearly see those advertisements on the high-speed subway. Pen, Fun, Ge www.biquge.info We and the subway and the advertising are relatively static, but in fact, the advertising and the subway are running at the same speed. In other words, although we are not moving, we are actually moving at high speed. If I'm not mistaken, the tunnels here are moving at the same pace as we do. So we walked for more than an hour, but it felt like we were walking in the same place. Since we weren't moving very fast, and there wasn't enough light here, it was hard to notice that the walls on either side of the tunnel or the ground beneath our feet were moving. Cui Linghong frowned tightly and explained while groping the walls on both sides of the tunnel.

It was then that I took a closer look at the walls on both sides of the tunnel, which were made of bluestone bricks. Glutinous rice juice and yellow mud are used in the crevices, so the viscosity and hardness are very high. This can be seen from the city wall of Nanjing, the former capital of the Ming Dynasty, and the walls made in this way are definitely not pressed against modern reinforced concrete.

It is said that after Zhu Yuanzhang unified the world, due to the lack of treasury, Zhu Yuanzhang, who made the capital of Nanjing, ordered Shen Wansan, the richest man at that time, to shoulder the burden of building the city wall. One-third of the city wall was built by Shen Wansan, and the materials used were glutinous rice juice mixed with yellow mud mentioned above. It's just that it was Zhu Yuanzhang's son Zhu Di who suffered later, the Yongle Emperor who rebelled and took the throne. The emperor Zhu Yunwen, who led the troops to attack Nanjing, was Zhu Yuanzhang's grandson and Zhu Di's nephew. However, under the city wall built by Shen Wansan in Nanjing, they suffered enough, and hundreds of thousands of soldiers and various siege equipment bombarded the city continuously for three months, but they did not even open a single opening. This shows how strong and durable the walls made of this material are.

Thinking of this, I couldn't help but have a question about Cui Linghong's inference, so I said: "Let's not talk about whether human beings had this wisdom in ancient times, even if they thought of this method. But what is the driving force behind the walls on both sides of this tunnel for thousands of years? Besides, there was absolutely no such thing as a sensor at that time, so how could the walls here have lasted thousands of years to determine the speed at which we are moving, and keep moving at a constant speed with us? And the walls here are so heavy that the slightest movement shouldn't go unnoticed. It's been over an hour since we've been here, have any of you heard a little bit of movement? ”

At this moment, there was a sudden "plop" that startled us. I thought the walls on both sides of the tunnel had really moved, but I heard the fat man scolding and saying, "You can drop water to the ground when you drink water, where this kind of bird doesn't, you want to scare us to death?" ”

I turned my head to look and saw that it was the skinny monkey who accidentally dropped the water bottle on the ground while drinking water. The fat man kicked the thin monkey in the ass, and the bottle cap in his hand fell to the ground with a clatter. The bottle cap gurgled and rolled out in the opposite direction we had come. And half of the bottle of water that fell to the ground also flowed in the opposite direction of our coming.

"This pit has a curve!" I reacted at the same time as Cui Linghong.

"What radian? Aren't you two evil? Damn, it's okay now, there was only one retarded, but now there are three at once. Didn't we all find that this tunnel had a curvature when we came? Now what's the ghost called? The fat man tried to touch my forehead with his hand as he spoke, but I pushed him away, and I didn't even mean to look at him, and the grandson's IQ was estimated to be forgotten to bring it out when he went out.

"You see, the caps and water that the thin monkey fell to the ground were moving in the same direction. This is definitely not accidental, but because this pit has a curvature. That is to say, the direction we are going is upward, but this arc is very small, so we have not found it. I don't think we'd have been able to see that if we hadn't seen the direction of the water. Cui Linghong explained to the fat man with some surprise.

"Well, we're not going in the wrong direction. Because where we fell is where we started, and we didn't find anything there. In addition, although the wave of people in front of us entered in a different way than we did, they did not find any trace along the way. So, they should still be ahead of us. The tunnel should be circular and winding upwards, somewhat similar to a spiraling up staircase, i.e. the walls on both sides of the tunnel are just a load-bearing body, and the ground under our feet is fixed to the walls on both sides. As long as we continue in this direction, we will reach the top of this circular tunnel. Maybe there will be an entrance or an exit at the top. In any case, only by getting to the top first can you make the next decision. With this in mind, our group finally regained our mood and continued to march forward.

It's just that everyone doesn't know how long they have to walk before they can get out of this tunnel, so they try to conserve their physical strength and rest every half an hour.

After about five or six breaks, the fat man finally couldn't help but start complaining, "How long the is this going to go?" It didn't take more than ten seconds for us to fall, so why are we still in this suffocating man's tunnel after walking for so long? If you want me to say, just take the explosives and blow up a hole. Wouldn't it be much more convenient and faster than we are now walking aimlessly? ”

"I don't like to talk to brainless people like you, not to mention that there is anyone here who is good at explosives. It's hard to estimate the thickness of the walls alone, and if you blow it up, there's no way anyone can handle the unpredictable dangers. "Who would have thought that before I finished speaking, the fat man scolded again.

"I said if you can drink a water to be safe, it's either dropped or leaked." The fat man touched his face with his hand and looked left and right. But in the next moment, the fat man was stunned. Because Cui Linghong and I were sitting on the ground facing the fat man against the wall, although the thin monkey was standing next to the fat man against the wall, he didn't drink water.

The fat man looked at the slimy liquid in his hand, and suddenly jumped up. We all looked up at the top of the fat man, and all four of us were startled at the same time.

Before we knew it, we were almost at the top of this spiraling tunnel. Looking up, there was a row of crystal coffins on it. The row of crystal coffins was soaked in a green liquid with a naked female corpse.