The giant flying saucer finally flew to a height of 100,000 meters above the crater and couldn't hover, as if waiting for the group of flying saucers below, or as if alerting, using its powerful detection system to find the invaders.

Of course, the giant flying saucer parked at a height of 100,000 meters, and Erdan couldn't see the naked eye. What he could see was about a hundred small flying saucers that "laid" in the volcanic cave.

More than a hundred UFOs were scattered and flew back and forth in a volcanic cave with a diameter of 80 kilometers, as if looking for something. The UFOs were flying very vigorously and quickly, even the complex of helicopters and fighter planes on our earth was not as good as it. They could erect the flat disc body ninety degrees, fly up and down, fly back and forth, left and right, and fly at various angles. Basically, it could do all the flying postures we could think of.

UFO, UFO, what does it mean to stay in a volcanic cave and not leave? Show off your driving skills? Conduct flying skills competitions? Just like Olympus, do your final farewell? Or are you really looking for an invader?

Hey, invaders? Are there any invaders on Mars?

Yes, there must be! For example, Comrade Li Erdan, a "alien planet".

Erdan's heart couldn't help but raise it to his throat, worried that these flying saucers were looking for him and Alice.

That's right? Erdan threw a stone into the crater just now and sang loudly. When he was tossing on the top of the volcano, it was impossible for the Martians to find him. If he was revealed, he would be characterized as an invader. For the invaders, it would be strange if he was not destroyed.

After the Martian flying saucer flew out, the beam of light shot from the bottom of the volcano suddenly faded, and the hole below seemed to be about to be closed.

Alice had to use her spiritual sense to remind Erdan, "Brother, hurry up and return to the UFO. It is not advisable to stay here for a long time, we have to leave."

With a whoosh, Erdan flew out, not towards the UFO, but responded to the light column: "You are in charge of the UFO. Don't use weapons unless you have to. I'll go to the bottom of the crater to see what's going on."

I have to admit that Erdan is becoming more and more curious about aliens now. He really wants to know a question: how many aliens are there on Earth now? Where are they hiding sneakily on Earth? What are they going to do?...

Alice recognized such a disobedient master, which was really unlucky. She could get herself in. But she had to listen to the words of Erdan and could only get angry. At this moment, there was no pretty figure in the flying saucer, because the power of her brain's mind turned into a beam, surrounding Erdan tightly.

The words are divided into two ends. The Kukulkan UFO is hidden in a large crack in the inner wall of the crater. It is blocked by rocks and is still in a state of invisibility. The "Mars" will not be able to appear for a while.

Erdan's Yang Shen flew unscrupulously to the crater covered by the light column in an invisible state, and condescending to him, he saw a scene that he would never forget for life. At the bottom of a volcano that is ten thousand meters deep, an extremely large "door" is closing, and the light is the one from this "door", bright white like a laser. This door is also very special. It is not the door that we commonly rotate around the pin axis, but a mechanism door that shrinks from the surroundings to the center. The n parts are embedded in one piece, like a Transformer. Erdan cannot see the underground world inside the door because the light is too bright, although the light is weaker as the door closes.

The largest diameter of the flying saucer that flew out was 500 meters, so the gate at the bottom of the volcano must be greater than 500 meters. Erdan looked like one thousand meters, which happened to be the diameter of the light column. Although one thousand meters is very large, it is much smaller than the 80-kilometer crater. Even if the volcano cave becomes smaller and smaller as it goes down, the area at the bottom is several thousand meters.

Why are there many volcanic rocks on the "gate"? In this case, if the "gate" is closed, even if someone goes down to the bottom of the volcano, his existence will not appear. This can completely explain that light appears in our cave on Earth, and people cannot see the source of light at all after entering. If the rocks in the cave can open and close, light emits when they open, and return to their original state when they close, who can see it?

Even if the sun is directly above the crater, it cannot illuminate the bottom of the volcano, which is ten thousand meters deep, so it is in a state of darkness all year round, unless the door to the underground world is opened.

I've come here, why not take a walk inside before the door is closed? Anyway, I can use the wall technique. Even if the door in the underground world is three meters thick, I can still wear it out.

He did it as soon as he thought of it. Erdan, who was not afraid of heaven or earth, has always been like this. His body turned over, his head was down, his legs were facing up, and his posture was so handsome that he flew towards the gate of the underground world that was about to be closed.

Everything will be revealed after Erdan enters the underground world.

The "underground" world is a mysterious place, often in film and television literary works, and it is well rendered, making everyone yearn for it. Before entering the underground world, a scene appeared in Erdan's head: a psychedelic city, gorgeous light and shadow, tall buildings, wide roads, various vehicles are flying on the road, flying saucers in the air, and seriously deformed "humans", extinct animals and plants,...

Last time in Beijing, at the underground civilization detection center, Erdan went to the "General's Banquet", he met a professor named Wang Zhi from the Department of Geophysics of Beijing University. Professor Wang Zhi was a loyal supporter of the "Earth Hollow Theory".

So will there be an underground world hidden inside the earth?

It's very likely! I haven't seen it before, who the hell knows it?

The depth of more than 4,000 meters is enough for Erdan to fly for a while. But just when he was complacent about his stealth technique, a Martian flying saucer appeared and flew towards him many times faster than him. At the same time, various weapon systems were in place, such as a laser muzzle aimed at him.

Although Erdan is invisible, it is not "no traces to be found". The volcanic dust spreading on his flight path changed, which means that he stirred up the airflow. This clue is enough to make the UFO's keen detection system appear strange. Moreover, the UFO's electronic computer can also outline a human form that looks like Erdan based on the data transmitted from the detection system. Of course, the Martians may have other magic weapons, which can show all objects that can be invisible. After all, their technology is not ordinary advanced, and we can't even think of it with our heads.
Chapter completed!