It's actually a very simple trick, and it's actually a magic trick from Persia, but it's actually a gem from the Western Regions. Mirrors made from this gemstone, which are particularly dull in the sun but particularly bright and shimmer in the moonlight, are known as moonstones.

The reason for this phenomenon is that this gemstone can only reflect a dull cyan light, and if the light is too strong, it will be the same as the stone, and the stronger the light, the lower the reflectivity.

This mirror in the water is a concentrator of light, and when our flashlight hits the mirror, the light is hit vertically to the top of the cave, and then reflected by the small lenses around the model of the ancient building to the countless moonstone lenses on the walls.

The reflected light from a single lens is extremely faint and almost imperceptible, but countless rays of light can be gathered, and the appearance of the ancient building above can be reflected on the ancient mirror surface in the water. Because it is a superposition of countless faint reflections of 360 degrees, no matter where we are, we will not form a shadow on the mirror.

Because the Moon Stone can only reflect cyan light, no matter what color of light we use, the imaging in the ancient mirror is a cyan light source.

"The Shadowless Light Principle." The fat man said, "I've watched the Science Discovery Channel." So why, I would see them in the mirror? The fat man said.

"There must be something strange in this ancient building model." I said, "Style thunder is really powerful, this is a Western technique." The development of science and technology in the Qing Dynasty has allowed the organs to achieve this point. ”

"Why is that, this neurosis, just making this thing to scare people?"

"I can only guess what the purpose of this mirror is here. In several ways, it is likely to be the lighting fixture of Zhangjialou. "I said." This is a lighting system, you think, Zhangjia Ancient Building deep in the mountains. If such a huge project were to be carried out in the middle of a mountain, the site would definitely require a lot of lighting. And this lighting must not be a torch, because in such a remote area, bringing grease in, the consumption is huge, and it will be a huge manpower obstacle. It is impossible for these people to know how to plant wood in the vicinity for a millennium of engineering in the future, if they can do so without taking into account the problem of lighting. ”

I did the math that if there were 200 people working on this place, it would take two to three years to complete. Including logging. Lighting in the next two to three years cannot be completely oil-dependent.

I looked up: "The sun must have been shining from above at first, probably because the lighting glasses set up on the top of the hill were broken or hidden by them." ”

So saying, I walked to the edge of the cave, and when the fat man asked me what I was doing, I said, "It rains a lot here, and sunlight is the most common, long-lasting, and least reliable light source, and they must have an emergency light source." These fire ditches should be emergency light sources. When they need light, they light the fire ditch here, here. There must be a passage that can transmit the light of the fire into the cave where the Zhangjia Ancient Building is located. ”

After I finished speaking, I waited for the fat man to praise me, saying that I was amazing, and my heart said that this speculation was simply impeccable. The fat man didn't react, but looked at the fire dragon wall around him.

I saw that his expression changed, and I saw that the flames on the fire dragon wall were dimming at the same time.

"Burned out of oil?"

"No, it's oxygen that's suddenly consumed in large quantities." The fat man reached out and felt his surroundings

Air. "Dog's day, what lighting. It's definitely not for lighting. ”

I follow his example. I feel a surge of air.

"The oxygen here is being pumped out, and the oxygen from the cave outside is being pumped in.

Like cupping, a large pressure difference can be formed. All the holes here that communicate with the outside world will suck in air. ”

"But what's the use of that?" I said.

The fat man said: "I don't know, but I have a foreboding." ”

As soon as I finished speaking, I heard a series of chain pulls from the walls around me, as if some mechanism had been activated.

"It's over." The fat man said, "Run! ”

"What's wrong?" I yelled. He pulled me and ran to the exit, yelling, "Air pressure on."

The trap has been moved! The traps here are all stone, so heavy that they have to be driven by air pressure!

This place is an air pump. ”

I realized it in an instant, but at this moment, suddenly, the puddle under my feet moved, and I ran a few steps and found that I couldn't stand at all. It turned into a slope under his feet, and at the same time all the water began to whirlpool. The last moment I could borrow my strength, I fell on my stomach and fell on the stone beam. As a result, my fingernails scratched it, and the whole person fell into the water, and I was swept into the water in an instant.

I was awe-inspiring in my heart: Damn, there is such a mechanism under this pool? Just when I was worried about how high it was down and what was underneath, I had already hit the ground, and the flashlight fell not far from me. Then the water from above kept rushing on me, crushing me to the ground.

I was so washed away that the pool above was not deep, but there were at least a few tons of water. I kept thrashing to barely manage a gap in the water to breathe.

The semi-suffocated state did not stop until all the water was gone, and I was exhausted by this time, vomiting and coughing incessantly, and squirting all the water out of my trachea.

What's this dog's day? I wiped my face and looked around, it was pitch black, and the flashlight was washed very far away. I touched the ground and found that it was not rock, but sand. The sand was washed out of a big crater, and I was in the middle of it.

Seems to be a bunker.

The fall seemed to be only two or three meters high, and I was glad that it didn't seem to be a fatal trap as I climbed up.

As soon as I took two or three steps in the direction of the flashlight, I felt that something was wrong.

My feet sank into the ground, and after three steps, I was already being dragged into the ground under my feet.

When I looked down, I saw that there was fine sand underneath. The sand is so fine that it can't bear the weight of a human being, and it's sinking down.

I reacted immediately - it was a quicksand trap.

The most common trap in the tomb is quicksand, which has no elaborate design, just a large amount of quicksand around the tomb, because quicksand is the same as water. So, if you dig up this quicksand layer, you can't dig out all the quicksand. Otherwise, no matter how you dig a pit, it's the same as digging a hole in the water. Every time you dig it, the quicksand gushes back. At the same time, the craftsmen of the tomb will design a flap on the floor of the ancient tomb, and as long as the tomb robber falls into the flap, he will immediately fall into the quicksand layer at the bottom of the ancient tomb, and will soon be lost.

The ghost said that the passage was very safe, how could there be such a trap? I was wondering as I lay on the quicksand. Enlarge your area, stop the speed of the slide, and touch your body at the same time.

I touched it for a long time, but I didn't touch anything useful, but my eyes gradually adjusted to the light here. I saw that the fat man was not far away, and he was worse than me, with his head down in the quicksand. Now only two feet are still tossing and turning, trying to turn my head out, but the more I toss, the more I sink.

In this environment, I have learned not to despair. The more hostile the environment was, the more I could win in the end.

But just when I calmly thought about the problem quickly. I found that this time was different.

Didn't have time for me to think.

Almost twenty seconds later, the sand was up to my neck. But, almost at the same time, I noticed that I was stepping on something.

Is it the bottom of a quicksand manhole?

It was a hard piece that stopped me from sinking. The fat man also flipped out, screaming. I asked him to come over, and he crawled to me as hard as he could, only halfway there. He didn't get to the point where there was only one head left, and stopped.

I gasped. Feel the sensation under your feet hard, and your heart says what's going on? Could it be that people in ancient times were short? The ancients did not expect that modern people would grow so tall. So digging the trap too shallow?

Impossible. Although I believe that quicksand traps can kill people as long as they can not reach a few centimeters, for the sake of insurance, such traps are usually dug very, very deep.

"Naive, are you alright?" The fat man yelled and threw himself at me.

"It's fine." I said. As soon as he finished speaking, the fat man groaned and stopped.

"What's wrong?"

"There's something in the sand." The fat man said, "Fucking it hit my lungs." ”

As he spoke, he saw the sand in front of him churn.

"What's that? It can't be alive. ”

"No, it's hard, it's like a stone. I'll get it out. The fat man said, "Damn, it feels a little weird." ”

After saying that, the sand churned, and a horn-like object emerged from the sand, and the fat man gritted his teeth, apparently straining under the sand. Wait a minute, the skull of an unknown animal emerges from the sand.

"It's a deer." The fat man said, "It seems that he is a poor creature like us." "After saying that, he threw away his skull and continued to move towards me.

"How did the deer come to this place, is there Santa Claus buried in this building?"

"Maybe they walked in by mistake, and there are a lot of them." The fat man continued to flutter, and soon pulled another bone out of the sand. I don't know what part it is, it's very long, like a bone spur. "Damn, it's a lot, it's so uncomfortable."

I also fluttered in the sand like him. It is difficult to move your hands in the sand, but the quicksand here has a fine texture, unlike the sand on the beach, which gets stronger the deeper you dig. Soon I also touched something hard.

I grabbed the thing and pushed it up little by little, and soon a bag of sand was bulging up on the sand pile in front of me, and I pushed it hard and pushed the bone out of the sand. The first thing I saw was a clump of hair.

I was stunned for a moment, and then I continued to climb up, and a hideous face emerged from the sand.

It was the dried corpse of a man. I saw his faded army-green clothes and realized that he must have fallen victim to some grave robbery.

"Hello Santa Claus." The fat man finally came to my side, "Looks like this is a mass grave." Don't look at it, we have to figure out a way, or we'll be Santa Claus too. ”

Our method is to use the bones in the sand to connect the cloth bands that we have torn off our bodies to make a bone frame, and then cover them with anything that can be covered to make something similar to a sled.

We had to make two pieces, first to climb on top of one and then to the other. In this way, the contact area between us and the sand can be much larger, and people will not sink in, and they will be able to move forward on the sand.

After doing it, I realized that this way was stupid. We can't go in a straight line, we have to go sideways.

The fat man pointed in one direction and said, "Go over there first, and we'll see how long you can run amok with cold eyes." ”

"Silly, that's not a good thing." I cursed, and I lay on the "sled" with the fat man, and the fat man handed me the chassis on one side, and I rolled over to the other, and the two of us rolled over, and so on.

All the way forward, it's really rolling forward. Rolling and rolling, and suddenly we came to a place, and the sand sank down. (To be continued)