Li Yang turned around and walked out of the cave, went to the jungle outside to find a few thick branches, wrapped them around strips of cloth and poured oil, and a few simple torches were made. He then took out the lighter from his backpack and lit the torches one by one, handing them to Leolu and the metal monster respectively. After that, Elio Road was in front, and the metal monster was in the back, and Li Yang was surrounded in the middle, and he tentatively walked along the passage to the interior.

There should be a place inside the passage that is naturally connected with the outside world, because there has been no air backflow since the passage was exposed, so Li Yang judged that the interior should not be completely closed, as for the specific situation, let's see when the time comes.

As Li Yang continued to advance, traces of excavation appeared on both sides of the passage, as for what Li Yang was digging, Li Yang did not know, but in Li Yang's opinion, this passage was a bit like a mine.

"It's in the middle of a hill. Could it be the remains of a mine? Li Yang muttered to himself.

He wasn't sure about that, as he was still a student and not a professional archaeological researcher. Although Li Yang was bold enough to come in and explore, he was still a little apprehensive in his heart, and he himself knew that his behavior at this time was a little reckless, but he thought that he should be able to run away even if he couldn't beat him. After all, he himself was now holding his handrail in his hand, and if he didn't do anything to him, he could retract the elf, jump on the back of the metal monster and let the metal block flee with him.

As Li Yang continues to go deeper, Li Yang has no idea how long he has walked, in short, this is a very long road.

Finally, Li Yang saw from a distance that there seemed to be a faint light in front of him, the light was not very dazzling, it didn't seem to lead to the outside world, it seemed that the inside had come to an end, Li Yang hurriedly accelerated his pace with the elf.

Walking to the light, a huge excavation site-like ruins appeared in front of Li Yang. The long years don't seem to have changed anything, but they all seem to have changed. Because there are several buildings connected to each other in the very center of the excavation site, the outer walls of the buildings are rusted and mottled in some places, and even covered with moss.

Li Yang glanced at the entire excavation site and couldn't help but sigh.

"This is hollowing out this mountain!"

Li Yang estimated that the diameter of this circular excavation site must be about 2.3 kilometers long, and looking up from Li Yang's position at the moment, there should be an exit from the top of the mountain, and there is a faint light shining down.

The entire excavation site was silent, and there seemed to be no sign of life.

"There should be nothing, no danger, how to go down?"

Li Yang thought about it and looked around carefully, and found that there was a winding road in the direction of his right, clinging to the stone wall, and spiraling down to the bottom of the pit. Since he didn't know what the situation was at the bottom of the pothole, he couldn't be accurately determined by looking at it from a distance, and he didn't know if there would be any danger if he flew directly down on a metal monster, so for the sake of safety, Li Yang still decided to move forward on foot.

It's a long journey again, and as Li Yang gradually approaches the building at the bottom, the vastness of the years comes to his face. Li Yang looked carefully, there was only this small piece of building at the bottom of the pit, and the exterior walls of the building should be made of some kind of metal, but most of them were rusty and mottled at the moment, and only a few places could faintly see the original light of the metal.

Li Yang walked to the edge of the building and observed the building very carefully.

The whole building complex, a total of 4 large and 6 small, 10 main buildings, each building is linked by a corridor, at this time, most of the small buildings have been damaged, exposing the appearance of the interior, it seems to be the appearance of the storage room, but at this moment it is empty, only the iron frame is left lying on the ground. However, in Li Yang's favor, Li Yang can borrow these buildings that have been exposed to go directly to the interior of several large buildings through corridors. Because Li Yang went around and only found that these buildings had a gate, but it was closed at the moment, Li Yang carefully observed, with the thickness of this gate, it seemed that it was not realistic to break through. There was a sign carved on the gate, because the rust didn't seem to be clear, but Li Yang felt faintly familiar, but he didn't remember where he had seen it specifically, it should have been seen by Li Yang in his previous life.

Li Yang walked to a collapsed building with the metal monster and Leo Road, and looked at the passage blocked by rubble and collapsed walls, iron shelves, and debris that couldn't tell what it was.

"Come on! Let's clean it up together. ”

With the active cleaning of one person and four elves, a gap was soon opened for Li Yang to pass through. Li Yang walked in cautiously, and a few elves only followed behind.

Walking on the inner corridor, as he continued to go deeper, the signs he had seen on the gate before appeared on the walls on both sides of the passage from time to time, and the more Li Yang looked, the more familiar he became, but he just couldn't remember when he had seen this sign.

Li Yang touched several main buildings through the corridor, judged his direction, and first turned to the building with a gate. Walking to the end of the corridor, there was no gate to enter the building from the inside of the passage, Li Yang looked carefully and found that there should have been before, but it seemed to have been knocked away by an unknown force. Without thinking too much, Li Yang walked into the building, looked around, this should be similar to the reception hall, next to Li Yang came in, the hall wall hung the same sign as the door, the sign in front of the arc-shaped platform, at first glance it was similar to the front desk, the hall should have chairs, tables and some equipment of unknown purpose, at the moment it was a mess, or piles, goods scattered on the ground. There are still scattered traces of damage on the walls around the hall, and there are still traces of battle on the floor, as if the battle was quite fierce at that time. Scouring the halls, I didn't find anything of value.

Li Yang then turned around and returned to the corridor and walked towards another building. The door in the corridor of this building was ajar, as if it wanted to be closed, but before it could be fully closed, it was only half closed. Walking into it, this building is much larger than the hall just now, and there are quite a lot of small rooms in the building, which seem to be living quarters, but there are no traces of battle, but looking at the interior decoration and the traces of scattered items, it seems that the people here fled in a hurry at that time. Li Yang searched room by room, and finally got something, in the desk in one room, he found a yellow stone, which was confirmed by the magnetic force of the metal monster, it should be a thunder stone. Finally, there is a harvest, and it is an evolution stone, although it may be that the owner of this building did not pay attention to it at that time, but it is an unprecedented harvest for Li Yang. After all, the Evolution Stone is not cheap, and it is not easy to find in the secret realm.