The moon in this world changed from a full moon to a new moon within one day, and the moon was much larger than the one in his original world. He knew that this was definitely not his original world. Even now that he saw the goods on Earth here, he still did not change his mind.

Xu Xin now feels a chill down his spine. What kind of secrets does this world hide?

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

Looking at the room again, the more Xu Xin looked, the more he felt that this place was like a prison.

But even prisons have toilets and beds, but this place is empty. Apart from the ragged skeleton in front of him, there is only a very heavy-looking iron door and a passage above his head that can be opened and looks like a vent.

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

Come to think of it, who would write a diary?

"Hmm!" Coco suddenly screamed, looking at the iron wall behind the skeleton.

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

There seemed to be some words engraved on the iron wall behind the skeleton, but they were blocked by the skeleton, leaving only a few traces of the engraving.

Xu Xin moved the skeleton gently.

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

After the skull fell to the ground, it rolled around on the iron floor and returned to Xu Xin's sight. The front of the skull was facing Xu Xin, and the deep eye sockets of the skull seemed to be staring 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 the like, but since he came to this world, his worldview has somewhat collapsed.

At least the science he knew could not explain why he woke up in this world, why plants grew so quickly, and why eating fruit could give him special abilities.

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

However, it did not come to life, but just looked like it was staring straight at Xu Xin.

It was very quiet inside the iron house. Xu Xin suppressed the strange feeling in his heart and looked at the wall that no longer had any cover.

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

But what left Xu Xin speechless was that the words carved on the wall were the same strange letters as those on the flashlights and compressed biscuit packaging.

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

"Hmm?" Coco tilted its little head and looked at the words on the wall. Unable to understand anything, it looked away and looked at the skull on the ground.

"This is too frustrating. I found the clues but I can't understand them." Xu Xin sighed and looked at the heavy door.

Whether this underground exploration will yield any results depends entirely on what is behind that door.