The look on Zhanfei's face was incredible.

Holding his breath, he didn't dare to move.

Wait until the "Yin Soldiers" walk past and watch them cross the underground river diagonally, disappearing into the rock wall as if no one was around.

The footsteps slowly faded away, and finally disappeared......

Zhanfei took a long breath and said, "It was clearly the 'Yin Soldier Crossing' just now, and the ghosts are infested, how can it be a 'very normal natural phenomenon'?"

The system opened the aura of ridicule: "It's terrible to be uneducated." ”

Zhan Fei broke out in a cold sweat and said angrily: "Then you explain, what happened just now?"

"The consulting fee is three contribution points per minute, and the starting price is thirty contribution points. ”

"Okay, buckle it. "Zhan Fei Dao.

The system suddenly asked, "Have you ever heard of a mirage?"

Zhanfei nodded: "Not only have I heard of it, but I have also seen it once in a while." It is said to be a phenomenon of refraction of light from the atmosphere, which casts light from distant cities into the air not far away, allowing people to see the scene of distant cities. In the desert, many travelers saw the oasis, but when they rushed over, they found that it was still a vast sea of sand, because of the influence of a mirage. ”

The system asked, "Have you ever heard of diving glasses?"

"Not only have I heard of it, but I've also seen the principle of 'diving goggles' in the elementary school "Nature" textbook. The simplest submersible telescope, in addition to the two convex lenses, is a pipe close to 'Z', with two reflective lenses at a 45-degree angle, so that the scene of the sea surface can be magnified and refracted into the submarine below the surface of the sea. ”

The system asked, "Have you ever heard of an astronomical telescope?"

"I've heard of it. ”

"Advanced astronomical telescope. You can see the light of a star millions of light-years ago, and you can see it...... It's the light that those stars emitted millions of years ago. Theoretically, as long as the telescope is high enough and has good filtering ability, it can even see the light reflected by some planets with relatively high brightness thousands of years ago. You can see all kinds of scenes on those planets thousands of years ago, tens of thousands of years ago, or even hundreds of thousands of years ago, such as landscapes, flowers, trees, etc., or big living people. ”

Zhanfei's heart moved, and he asked in surprise: "Then you mean ......?"

"That's right, the principle of the formation of the 'Yin Soldier Crossing' is very simple. There is a strong magnetic field distortion nearby, and even some subtle spatial cracks will appear, casting some light that should not exist here. It's similar to how 'Avatar-Reality Imaging-Projector' works, where the light hits the fine dust of the air. Or it can be reflected by a special force field to create a 3D reality effect, and it will look like some big living people are walking by. ”

Zhanfei was dumbfounded.

The system added: "There are many sources of light for the Yin soldiers to transit, but there are three main types: 1. The light projected by parallel time and space. 2. The light rays that are projected from distant planets to the Earth and imaged here through magnetic space. 3. The light emitted by the ancient earth enters an endless loop in a special force field environment, and then emits light at this time.

"There are two other possibilities: first, the scene formed by the composite of the above several kinds of light. 2. The disturbed magnetic field around you has an effect on your brain, causing you to hallucinate. ”

Zhan Fei was stunned for a while. He said, "What about the sound just now, and what happened to the footsteps?"

The system added: "There is a place on earth called 'Gramophone Valley', in the weather of thunder and lightning. From time to time, you can hear voices talking from inside, but when you look for it, you can't find anyone. According to the research of earth scientists, it is because there is a large amount of iron ore there, which is often struck by lightning, and some ores are magnetized and broken. Squeeze together.

"When someone speaks, the voice echoes through the valley. Some finely fragmented magnetized particles produce vibrations, and the magnetic field wire-cuts the metal. A microcurrent is generated, and the corresponding electromagnetic signal is recorded in the iron ore.

"When the thunder strikes again, the lightning will fall down, some of which will be absorbed by the ground, and some of the electric current will pass through the iron ore, and the magnetic field will cause the magnetized particles to vibrate and make a sound, just like a human speech.

"It's like recording with a tape recorder and then playing it back. It's just that most of the iron ore valleys are not so magical, and only the special environment of that place and all kinds of coincidences can cause such a magical effect.

"If a parallel world can transmit light, why can't it be a sound or an electromagnetic signal? Not to mention the sound of the 'Yin Soldiers' walking, even the sound of them calling for someone to eat in front of you can be heard. ”

Zhanfei was dumbfounded again.

After hesitating for a moment, he asked again: "But I heard that when the 'Yin soldiers cross', they can't be stopped, otherwise there will be ominous, some people may die unexpectedly, and some people will be directly pulled down from the underworld." ”

"There are many reasons for this. 1. Spreading falsehoods is not something that all 'Yin soldiers can cross the border' that cannot be stopped. 2. Where the 'Yin Soldiers Transit' occurs, there must be abnormal changes in the magnetic field, or abnormal spatial changes. Then, the possibility of a spatial crack in the vicinity will also exist.

"The shape of the spatial rift is unstable, if the rift is large and someone enters it unintentionally, it will be teleported to another time and space, as if being pulled into the underworld by the Yin soldiers. If the crack is narrow, only half of the body may teleport through, and half of the body will remain on this side, being cut in half. If the spatial rift is finely shattered, the blocking human body will be cut into many pieces, as if it had been shattered by a Yin soldier.

"If there are only very small spatial cracks, some parts of the human body will be penetrated, forming internal bleeding, and there is no apparent cause of death on the outside, or bleeding from the seven orifices, and all kinds of horrific scenes will exist.

"Third, the forces of space are sufficient to cut through the vast majority of matter known in the universe, including the nucleus. If it is a junction area between two spaces, strong nuclear radiation will occasionally be generated, and the human body irradiated by nuclear radiation is very likely to produce various pathologies and suffer before death. It's like intercepting the 'Yin Soldier Transit' and being cursed.

"In addition to this, there are several reasons to ignore. ”

Zhanfei couldn't be more dumbfounded.

That's how it is......

Science or something, it's so annoying. A good Yin soldier crosses the border, how mysterious and energetic, but as a result, as soon as the secret is revealed, it is much more boring.

"Okay. So that's what happened...... Then, if you really encounter a Yin soldier crossing the border, how can you tell if there is a spatial crack in the surroundings? How can you tell if there is strong nuclear radiation around? Do you want to avoid it urgently?"

The system said: "Where there is a 'yin wind', there is often air convection in two different spaces, and there is a greater possibility of spatial cracks. ”

"It's just 'bigger'? Isn't there definitely a spatial crack?" Zhan Fei asked.

"It's also possible that it's just nearby air moving on its own. The system said.

Zhanfei nodded, and the system said: "You have to judge whether there is strong nuclear radiation around." Must be tested with a professional instrument. If you see Yin soldiers crossing the border from a distance, it is best to avoid accidents to avoid accidents. But if you suddenly find the Yin soldiers crossing the border at close range, it is best not to move, and you may break your hands and feet if you move your hands and feet. If you are not afraid of death. Try throwing dust, such as incense ash. ”

"Why?" Zhanfei asked.

"The appearance of the Yin Soldier nearby does not mean that the spatial rift is nearby, it may be a few meters away, or even dozens of meters away. It's like being in a movie theater and seeing an image on the screen, but the projector is far away...... By throwing dust, the reflected light changes. The image and position of the Yin Soldier will also change. Through calculation, the size and specific location of the spatial crack can be roughly estimated, and then avoided. Save your life. If the computing power is not enough, it is better to stand still - the spatial rift will move, but it is not very likely. Moreover, this spatial connection is unstable and can easily be automatically repaired by the Earth's gravity and magnetic forces. ”

"I see......"

Zhanfei thought for a moment and asked again, "Vincy." If the spatial rift is really big enough, will it really be possible to travel to another world?"

The system said, "It's better not to try. The other side may not be suitable for human survival. Suppose there are thousands of spatial cracks as small as the eye of a needle packed together, and they can be detected by dust, etc. It looks like a huge spatial rift, and if you walk through it, you'll die.

"There are spatial cracks, and the other side is not a world with air, but a vacuum. It's just that the spatial crack is so small that it can't even be worn by a hair, and only a small number of air molecules are allowed to pass through.

"There are also some spatial cracks, which are enlarged one second, and rapidly shrink and shrink the next second, sharper than any guillotine in the world. There are even some spatial cracks, which themselves are high-frequency vibrations, amplifying millions of times and contracting millions of times per second......"

Zhan Fei was creepy and quickly dispelled the idea of traveling through time and space.

"In addition, to explain that the vast majority of the so-called spatial cracks are not spatial cracks, but 'field space' cracks. ”

Zhanfei asked, "Is there any difference?"

"Theoretically speaking, real space is extremely difficult to tear, even if it is near a black hole, there will be no real space cracks, only cracks in the 'field space' will appear." How does this thing compare to real space...... Wait until your permission level rises and your IQ rises to 18, then explain. lest you do not understand. ”

Zhanfei didn't choke to death by his own saliva, this bastard of the system is naked-naked, despising his IQ.

"Hmph, if you don't explain, you won't explain, what's the big deal?"

As he was muttering, the light around him gradually dimmed again, and Zhanfei had to move forward in the dark again.

Occasionally, when I accidentally step on something soft and soft, I will be bitten hard, which makes people's scalp tingle. Fortunately, he is now invulnerable and not afraid at all.

Zhanfei is confident that even if he is bitten by a crocodile, he will not be injured, let alone a mere roadblock?

Soon after, it came to the end, but it was a huge rock, and there was no base in sight.

"Top right. "System prompt.

Zhanfei stretched out his hand and touched it, and there was a round thing on the stone wall, which was very smooth.

"This is a device for DNA detection, fingerprint detection and brain wave detection, and if it passes, it can be opened, and if it fails many times, it will be shot by a hidden defensive weapon. The stone walls around the entire base are sandwiched with super-strong alloys on the inside, which are alien products that can resist nuclear bomb attacks. ”

Zhanfei was stunned: "Then how do I get in?"

"Crackable...... 100 Contribution Points. ”

"Okay, buckle, buckle. ”

As soon as Zhanfei's words fell, he heard a tick, and it seemed that the test had passed.

There was a slight vibration under his feet, and then he saw that the stone wall in front of him was slowly rising, and a soft light came out from below.

In a moment, the stone wall was completely raised, and Zhan Fei saw the vast space behind the stone wall.

"It's ...... Alien base ?!!"

Before Zhanfei could be happy, let alone observe carefully, a few laser beams were shot out of it. (To be continued)