As expected, most of the stone walls are hollow.

Moreover, every distance, the octagonal ridge-shaped objects embedded in the wall will appear on the wall, and these small things are arranged in a very regular manner, as if they are parallel to several straight lines, arranged in six lines from top to bottom.

These gadgets were unable to determine what material they were made of, although they emitted a flashing light under the light, which was a bit like quartz stone.

But the uneven carvings make these regular arrangements of small things and their brilliance very well. If Lin Feng hadn't happened to touch them, he wouldn't even find them.

As we groped along the way, Lin Feng went further and further.

Gasol did not dare to leave the gate of the cave. When he thought of the "light coma" phenomenon that the creatures in the cave had just appeared, he quickly turned on the headlight power to the maximum.

After turning on, he felt that it wasn't bright enough, so he turned on and pulled out the other two spare flashlights, then hid in the darkness, and quietly listened to the movements in the abyss.

I don’t know how long it took, but Lin Feng came back silently.

Through the heat tracker, Gasol strangely discovered that Lin Feng's influence was very dim, as if he had just returned from the snow and asked very low questions.

He thought about it and perhaps Lin Feng used some special abilities himself to control the shrinkage of pores and minimize the heat leakage in the body.

Gasol knew that Lin Feng was so tough, so he was not surprised or surprised by his ability.

"As expected, this ring corridor has protective facilities, and the entire ring corridor is surrounded by a circle."

Lin Feng spread his hands and a few shining small stones appeared in his palm. He continued, "I have discovered where the inexplicable light net comes from, it is from this small stone."

Gasol took the small stones and observed them. Lin Feng continued to explain from the side, "I just picked out a few small stones from the wall, ran back again, and went to the channel entrance of the axis of time to observe the location of the light net that was emitted.

Those light nets that make the metal disappear inexplicably are emitted from these small stones, and these small stones are embedded in the walls, which are very difficult to detect.

After I picked out these small stones, I found that there was a certain optical fiber connected behind them, which was similar to the transmission fiber inside a laser gun.

Now, we finally figured out the matter.”

After hearing Lin Feng's words, Gasol closed his hand, pinched a few small stones in his hand, looked at Lin Feng, and waited for Lin Feng's following.

"When we opened the channel of the Axis of Time, the entire underground protection network was activated, and all the creatures living underground disappeared strangely.

So when we entered the underground flight laboratory, we saw clean scenes."

Lin Feng explained so.

At the beginning, the survivors spent a lot of effort and only entered the above workshop, or the assembly workshop, which was not the core area.

Through the information left on the scene, the survivors confirmed that there was a secret laboratory deeper underground.

It’s a pity that the surviving tribe spent many years and sacrificed many people, but they couldn’t open a deeper channel.

After the Asian branch explosion, many research materials of the surviving clans were lost. Fortunately, it was not the first time that the surviving clans encountered such a thing in thousands of years of operation.

They used the most advanced equipment to make data backups in several important relics around the world.

After these data are backed up and encrypted, they are disguised as inconspicuous prehistoric relics. People from the surviving clans are looking forward to that even if one day they suffer a catastrophe, they will be able to interpret their research results after the current human science and technology level reaches a certain level.

The reason why this cave can become a data storage point for the survivors is that opening the cave requires unimaginable energy, which is enough to require the energy supply of a complete nuclear power plant.

The survivors think that no one will build a nuclear power plant specifically to open this cave, and humans may not be able to find ways to open it.

Even if we take a step back, humans are really capable of opening the door with portable energy containing huge energy, then by that time, the scientific and technological achievements in this cave would not be enough to affect the balance of the world at that time.

Therefore, the research results of the survivors a hundred years ago are stored here. Once these results are spread to the market, they will definitely cause a huge storm.

In other words, these scientific research results are the most suitable only if they are placed in such a dangerous place that ordinary people cannot enter.

A hundred years ago, when the remnants were doing a lot here, they did not leave any records of encountering cave creatures, so this species must have just entered here for a short time.

The species that Lin Feng and others encountered in the upper class were probably their sentinels or explorers they sent out to go out for investigation.

From this point of view, this mysterious house may have been here for a short time.

The biggest possibility is that Lin Feng suddenly activated the basement, triggering the protective device here, causing these explorers to disappear collectively.

And the three underground cave people just now may be the first batch of search and rescue personnel sent by their tribe to search for their explorers and investigate the reasons for their disappearance?

“We have to race against time now.”

Lin Feng glanced at the flashlight that Gasol placed on the ground, and then said, "The people of the cave will continue to send people to explore the truth. We must find the core location here as soon as possible and activate the safety device to resist the continuous emergence of the cave creatures."

Since Gasol has taken action, the next conflict cannot be avoided.

The creatures in the cave can move freely in the dark, and Lin Feng and others carry not many weapons and ammunition, so they can only rely on the prehistoric human protective equipment left here to protect them.

Although it is a bit frustrating, it is also a helpless fact.

After listening to Lin Feng's suggestion, Gasol glanced at the flashlight on the ground and quickly thought about the plan to respond in his mind.

"So, I'll stay here. You go search around and call Candy, who is good at setting traps." Gasol thought for a while, and then said, "I want to close this door, and then arrange some trigger devices at the door. When they open the door, let the flashlight suddenly start and shoot them directly with strong light..."
Chapter completed!