This is actually a very simple trick, and it does originate from Persian magic. In fact, it uses a kind of gem from the Western Regions. The mirror made of this gem is particularly dim in the sun, but is particularly bright in the moonlight. Therefore, this gem is called Moon Stone.

The reason for this phenomenon is that this gem can only reflect a dim blue light. If the light is too strong, it will be the same as a stone. In other words, the stronger the light, the lower the reflectivity.

This mirror in the water is a light gatherer. When our flashlight shines on the mirror, the light is reflected vertically to the top of the cave, and then it is reflected from the small lenses around the ancient building model to countless moonstone lenses on the wall.

The reflected light of a single lens is extremely weak and almost impossible to detect, but the gathering of countless lights can make the mirror of the ancient mirror in the water reflect the appearance of the ancient building on the upper end. Because it is the superposition of countless faint reflection points at 360 degrees, no matter where we are, we will not form shadows on the mirror.

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

"The principle of shadowless lamp." said the fat man, "I have been from the Science Exploration Channel. Then why do I see the guys and the others in the mirror?"

"There must be something strange in this ancient building model," I said, "The style is indeed amazing. This is Western technology. The development of technology in the Qing Dynasty can certainly bring the agency to this point."

"What's this for? This person is crazy, is he just scaring people by doing this?"

"I can only guess now what the purpose of this mirror is, and we can talk about it from these aspects. First of all, it is likely to be the lighting device of the Zhangjia Ancient Building," I said, "This is a lighting system. You think that the Zhangjia Ancient Building is deep in the mountains. If such a huge project is to be carried out in the mountains, this construction site will definitely require a lot of lighting, and this lighting must not be a torch, because in such a remote area, it is a huge project volume, which will cause a huge manpower barrier. These people can understand that they need wood for nearly a thousand years to plant nearby projects that are needed for nearly a thousand years, so they cannot consider the lighting issue."

I thought about it. If this place was constructed with 200 people, it would take two to three years to complete. The lighting within these two to three years cannot be entirely reliant on grease.

I looked up and looked at it: "At the beginning, the sunlight could definitely be shining from above. It is likely that the lighting mirrors set up on the top of the mountain were damaged or hidden by them."

Then, I walked towards the edge of the cave. The fat man asked me what I was doing, and I said, "It's rainy here, and sunlight is the most common, the most lasting but the most unreliable light source. They must have emergency light sources. These fire grooves should be emergency light sources. When they need lighting, they will ignite the fire grooves here. There must be a channel here that can transmit the fire into the cave where the Zhangjia Ancient Building is located."

After I said that, I was waiting for the fat man to praise him. When he said that I was amazing, he thought that my guess was simply flawless. But the fat man did not respond, but looked at the fire dragon wall around him.

When I saw his expression changed, I saw that the flames on the Fire Dragon Wall became dim at the same time.

"The turmeric oil burned out?"

"No, it was the oxygen that was suddenly consumed a lot." The fat man reached out to feel the air flowing around him, "Damn it, what kind of lighting is, this place is definitely not used for lighting."

I reached out to see him and felt a stream of air surging.

"The oxygen here is consumed, and the oxygen in the cave outside is being pumped in, like cupping, which will form a large pressure difference. All the holes connected to the outside world here will suck people's air."

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

The fat man said, "I don't know, but I have an ominous premonition."

As soon as I finished speaking, I heard a series of chains pulling sounds suddenly from the surrounding walls, as if some mechanism had been activated.

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

"What's wrong?" I shouted. He pulled me and ran to the exit, shouting: "The air pressure has started the mechanism! The mechanism here is full of stones, which is too heavy and must be driven by air pressure! This place is an air pump."

I realized it instantly, but at this moment, the pool under my feet suddenly started to move. I didn't run a few steps and found that I couldn't stand any longer. A slope appeared under my feet, and all the water began to vortex. At the last moment when I could use the force, I lay on the stone beam, and my nails slashed hard on it, and I lay in the water. In an instant, I was swept into the water.


Chapter completed!