Sitting ten meters away from the cave entrance, Xu Xin hugged Coco and quietly waited for the red gas to disperse.

It wasn't that he didn't want to go in, it was just that the smell was simply unbearable.

And Xu Xin is a little worried that the smell is poisonous. Although Xu Xin's body is now a little weak except that she vomited all her dinner, she has no other problems, but who knows whether inhaling too much will have any serious impact on the body.

It's better to be cautious.

Gradually, the red gas no longer floated out of the cave entrance, and the surrounding red color also dispersed under the influence of the wind.

Xu Xin walked to the entrance of the cave and looked inside. There was still a faint red gas floating inside the cave, but it was already very light and much better than when it just came out.

After all, there is no ventilation in the cave, and it is unrealistic to completely diffuse the gas. This is the best result. Xu Xin sighed and asked Keke: "Are you still going down with me?"

Coco's body stiffened, he hesitated, then nodded his head and jumped on Xu Xin's shoulder.

Xu Xin touched this little guy's head, tied his clothes on his face, gritted his teeth, and entered the cave.

There was a faint red color floating in the passage inside the cave, but Xu Xin was surprised to find that the red gas did not fill the entire passage, only the upper part of the cave was still floating.

He tried to bend down, and sure enough, although the low air still had a weird smell, it was already within the range he could bear.

"It seems that this strange gas is lighter than air. This will be easy to deal with. The foul-smelling gas in the iron door should have drifted out!" Xu Xin bent down and moved forward in the cave, quickly reaching the opened door.

The location of the subway gate.

Looking inside, there is a square iron passage that only one person can go up and down. An iron ladder is fixed on the wall of the passage, and it goes down to an unknown depth.

The ladder was also covered with rust. Xu Xin felt a little scared looking at the passage, but he still stepped on the ladder and started to climb down.

The passage was very long, and Xu Xin crawled step by step. The only sound in the entire passage, which was like an underground well, was his footsteps and Coco's moans on his shoulders from time to time.

The little guy was also a little scared. He was holding on to the clothes on his shoulders tightly with all four limbs, just for fear of accidentally falling.

"This passage is too long! I won't really go underground!"

The passage was too long, and Xu Xin felt that her arms were shaking a little. But she had no choice, she was already halfway up, so she couldn't give up and climb up again.

Keep climbing down.

He didn't know how long he had been climbing. Just when Xu Xin felt that he could hardly hold on to the ladder, he finally entered a room.

After only climbing down another four or five meters, Xu Xin had already stepped on the ground.

"Finally climbed up!" Xu Xin stood on the ground, crossing his hands and kneading the muscles on his arms, "How much iron does it cost to build such a long iron passage!"

While muttering, Xu Xin turned around and began to look around, but at the first glance, his pupils shrank suddenly and he took a breath.

The entire room was empty, with three of the four walls made of standard iron plates, and not even a single window. There was only a door on one wall that looked very thick and strong. The door was round, a bit like a vault door.

The first thing he saw was a humanoid skeleton in shabby clothing leaning against the wall.

"People have been here before!"

Xu Xin was a little shocked. Deep underground in this wilderness, there was an underground room that looked like a vault. In this room, there was actually a skeleton!

Who is he? Could he be a former survivor? Or an aborigine of this world?

Xu Xin looked at his clothes carefully. Although the clothes were very tattered for some unknown reason, he could still tell that it was a standard outfit for survival in the wilderness.

Walking forward, Xu Xin saw a dirty package placed next to the skeleton. The package was made of animal skin. It was unknown how long it had been placed underground. Most of the package's outer skin had fallen off.

It looks extremely shabby.

"Excuse me, brother." Xu Xin muttered to herself and opened the package.

There was a musty smell in the animal skin package.

The items inside were rather miscellaneous, so Xu Xin poured out all the items in the package and began to count the items in detail.

"A multifunctional knife that was completely rusty and falling apart, an empty lighter, and a small flashlight. These are all tools on earth! This person must have come out to survive in the wilderness. These tools are all so complete." Xu Xin muttered to herself.

He said, "But the question is, why would someone come to this world with tools from the earth?"

Coco jumped off his shoulder and dug through these things with her little paws.

There are even packages of compressed biscuits that have been eaten.

He picked up the lighter and flashlight. Although the writing on them was a little blurry and the flashlight's appearance was even cracked, Xu Xin could still see the name and logo engraved on the surface of the product, which were words he couldn't understand.

He had some exposure to European writing, and this alphabet should be Greek.

He picked up the packaging bag of compressed biscuits again. Although he still couldn't understand the words on the packaging bag, he could still see the vague production date on it, which was April 1980.

The shelf life of ordinary compressed biscuits is only about three years. If this person did not eat expired compressed biscuits, it means that he has been dead for at least nearly 40 years!

40 years ago, there were already people in this world!

The moon in this world changed from a full moon to a new moon in one day, and the moon was much larger than his original world. He knew that this was definitely not his original world, even though he now saw the world on earth.

The products still haven’t changed this idea.

Xu Xin now feels a chill down her spine. What kind of secrets is hidden in this world?

Could it be that someone was sent to this world forty years ago? But how could he have anything he brought from there?

Looking at the room again, the more Xu Xin looked at it, the more it felt like a prison.

But even in a prison, there are toilets and beds, but it is empty here. Except for the ragged skeleton in front of me, there is only a very heavy-looking iron door and the vent-like vent above the head that can be opened.

aisle.

There was no diary or anything like a diary in this animal skin package for Xu Xin to refer to. He took another look at the skeleton and found that except for the tattered clothes, there was nothing of value, which made him a little disappointed.

Come to think of it, no serious person keeps a diary.

"Hey!" Coco suddenly shouted, looking at the iron wall behind the skeleton.

"What's wrong?" Xu Xin followed Coco's gaze.

There seemed to be some writing on the iron wall behind the skeleton, but it was blocked by the skeleton, leaving only a little trace of the writing.

Xu Xin moved the skeleton gently.

Unexpectedly, he just pushed it gently to the side, and the skeleton fell to the side and fell to the ground. The bones separated and shattered into bones. Xu Xin jumped back in fright.

After the skull fell to the ground, it rolled around on the iron ground and returned to Xu Xin's eyes. The front of the skull was facing upwards, facing Xu Xin, and the deep eye holes of the skull seemed to be in front of Xu Xin.

Stare straight at him.

"Hiss——!" Xu Xin took a breath of cold air.

He used to not believe in ghosts and gods at all, and was not afraid of skeletons or anything like that, but since he came to this world, his worldview has somewhat collapsed.

At least the science he knew couldn't explain why he woke up in this world, why plants grew so fast, or why he could gain special abilities by eating just a piece of fruit.

In this world, anything can happen, including this skeleton suddenly coming to life.

However, it did not come to life, but seemed to be staring directly at Xu Xin.

It was very quiet inside the iron house. Xu Xin endured the strange feeling in her heart and looked at the wall that had no shelter.

There was a string of words engraved on it, probably carved with a knife, and there were purple-black stains on the edge, which looked like dried blood.

But what left Xu Xin speechless was that the words engraved on the wall were the same as the words on the flashlights and compressed biscuit packages. They were all strange letters.

Xu Xin has only learned English as a foreign language, and has also been exposed to some Spanish. Xu Xin cannot understand other European texts at all, let alone Greek, the second most difficult language in the world.

"Huh?" Coco tilted her little head and glanced at the words on the wall. Unable to understand anything, she looked away and looked at the skull on the ground.

"This is too uncomfortable. I found the clues but couldn't understand them." Xu Xin sighed and looked at the heavy door.
Chapter completed!