It was just dawn, and Hongye and Song Enru accompanied me up the mountain. They sent them to the entrance of my cave. Hongye emphasized the precautions inside again. Song Enru repeatedly told me to be careful, and it was obvious that she was particularly worried about something that happened to me.

Perhaps her heart, which has been hit repeatedly, can no longer lose again. I kept Hongye's words in my heart, then shook Song Enru's hand, and promised her that I would do what I could and if the progress was not going well, I would come out immediately.

Hongye went down into the cave and pressed a rock wall next to the stone plate. If she didn't press it, I wouldn't have found a hidden mechanism in that place.

The mechanism was retracted into the rock wall, and I listened carefully. A very subtle sound came from the rock wall, as if it was a mechanical operation.

After all the small sounds stopped, Hongye opened the stone tray for me. Each group of patterns on it was actually a password and needed to be pressed in a specific order. Hongye said that this is the correct way to open the tunnel.

I stepped into the entrance of the open tunnel, waved at Hongye, and turned around and walked in. The pattern inside was slightly different from the last time I came in.

The original fork was gone, and there was only a straight cave in front of me, but according to Hongye's description, every time I walked, there would be a division point.

These segmentation points are also time nodes, similar to time scales, but she doesn't know the duration of each scale, so I need to verify it.

When I reached the first time node, I searched on the wall for a while. In fact, what represents the scale is the relief on the wall.

The relief is only the size of a mobile phone, and the shape is very simple and can be easily ignored.

Hongye said that these are the numbers used by the builders, just like the Arabic numbers used by humans, with simple structure and easy to remember.

Such digital reliefs are mixed on the uneven rock walls. If you hadn't learned the inside story in advance, you would have to touch them inch by inch before you could see them.

I found the first node, touched the surface of the relief, and did not notice any abnormality, so I continued to walk in.

In order to facilitate contact, Song Enru and I brought the walkie-talkie over here. I thought that since the distress signal from Fang Xu and Miao Xiaoran could be transmitted, there should be no electromagnetic interference here.

But since I came in, I have seen the walkie-talkie fail. Of course, there is nothing to make a fuss about. When Fang Xu and Miao Xiaoran were trapped, the space here was in a mess, and it is very likely that the interference signal did not work.

After Hongye repaired the tunnel, the original interference source was restarted and the inside and outside could not be contacted.

I touched each node one by one, and when I touched the fourth digital relief, my body finally felt something strange.

My head was a little dizzy and I felt the shaking feeling of timely aftershocks, but it felt very mild and there were no more abnormalities.

I looked down at the watch. Since I came in, I would look at the watch every ten minutes. If the time starts to flow backwards, the time displayed on my watch should be backwards, and it may even fail.

When I felt my body shaking, I immediately looked at the watch, but the pointer did not change at all. The time was 7:10 in the morning.

Because I promised Song Enru that I would stop as long as I noticed something strange, so I did not continue to move forward, stopped under the fourth digital relief and prepared to walk back.

According to our previous agreement, I should contact Hongye through the walkie-talkie, and she would turn off the tunnel switch outside, and then I would go out again.

But now the walkie-talkie is failing, so I can only try my mental power. If my mental power cannot penetrate, I have to return directly.

I released my mental power and stretched to the surface of the ground, but unfortunately, the mental power I stretched out seemed to be swallowed by the empty space, and it could not reach the surface of the ground any more I released.

"Hey... it seems that I can only leave with force." I muttered, turned around and started walking back.

However, as soon as I took two steps, I frowned because the cave behind me disappeared, and all the traces of human construction disappeared.

Digital reliefs, flat ground, regular caves, all turned into pure natural caves. I was about to withdraw my feet, but it was too late. The moment I stepped into the natural cave, the tunnel behind me also disappeared.

Those roads that I had not yet walked have also become natural caves. Obviously, I successfully entered another time and space, and it must be the past time and space, earlier than the time seen by Hongye. This should be when the cave was not started to be built.

Many times, I can't explain why this is the case, I only know that the result is this. After all, I am not a scientist and have never learned professional knowledge related to it.

From my common sense, the time tunnel should not send me to an era when it does not exist, because it does not exist at this time, so how can it play a role in time travel?

unless……

A bold idea suddenly popped up in my mind, unless this natural cave was originally a time tunnel, and the plane travelers just slightly transformed it and renovated it.

I am very curious about what era it is now outside. The plane travelers have not yet discovered this tunnel. Could it be in ancient times, or in the original period?

But I restrained my curiosity and gave up the idea of ​​teleporting out to see. I followed Hongye's instructions and no matter how the changes inside, just keep walking back.

Because I may have gone too far, assuming that a point in time is a hundred years, then I have gone four hundred years ago, and all I need to do is return according to the original route.

"Who?" A voice suddenly rang in front of me.

The cave was pitch black and I couldn't see my five fingers. Of course, my night vision ability allowed me to see the surrounding environment clearly, but I really didn't see the people in front of me.

Suddenly, in an environment where I was very sure there was no one, people suddenly rang out, so I was shocked.

"Who?" I asked subconsciously. There is still a difference between fear and fear. What I am afraid of is not something that cannot be explained in the darkness, but that I was shocked by the fact that someone actually came here.

"Which plane is from?" the other party asked again.

When I heard the word "plane", I immediately realized that he was a plane traveler, and the plane where Lu Zhi was instantly shot out in my mind.

So I casually told the organization where Lu Zhi served. The man suddenly lost his voice after hearing this. I thought to myself that the plane travelers built here were most likely illegal travelers, and the organization where Lu Zhi served was specifically to capture these illegal travelers.

In this way, will I be hostile to the other party?

"What's your name?" the one asked after a few seconds of silence.

I stared at the darkness ahead and released my mental power to detect the surroundings. I decided that there was only one person on the other side and that the energy in my body was not very strong, so I felt relieved.

"Lei." I made up a random title that looks like a name and a code name.

"Lei? I haven't heard of it." The man seemed to have searched in his memory, but his tone didn't sound very certain.

"I'll investigate the illegal time traveler." Since the lies have been told, I decided to make them all the way.

"Are you alone?"

“My partner is outside.”

"We are legally traveling through time and have approval documents."

"Oh, legal..."

I remember Lu Zhi said that in order to protect the low-level plane, a large number of time travelers are prohibited from entering and leaving. If a few people have to come over, just use the time shuttle like Lu Zhi. There is no need to mobilize troops to build a time tunnel.

Besides, the tunnel was abandoned later, so I didn't believe what this person said, so I had a little doubt in my tone.

Actually, I thought about asking for approval, but firstly, I couldn't understand the text of their plane, and secondly, if he asked for the ID, I wouldn't be able to justify myself.

"Do you need to read the approval document?" the man asked on his own initiative.

"Forget it, I'll just ask casually." No matter whether his words were true or false, I didn't need to stop them from acting. If they gave up on this place, I wouldn't have traveled here.

I just want to stop the disaster from happening, and I don’t want to do extra things. The consequences of the butterfly effect are beyond expectations, so I think it’s better to have less than more things.

"Then can I ask you to leave the survey site?"

"I'll leave right away."

As I passed by him, he raised his wrist and said something to something flashing on his wrist, and my body paused uncontrollably.

But after just a slight pause, my steps did not stop. The moment I passed by him, the man and I looked at each other in the darkness.

As the distance narrowed, I finally saw his appearance clearly. Although I was very surprised, I tried my best to remain calm on the surface.

This man looked exactly the same as Lu Zhi, and the words he said to his wrist just now were, "Lu Zhi, come in immediately."

A person who looks exactly like Lu Zhi also called Lu Zhi's name. Are they twin brothers?

"What's your name?" I turned around and asked the man.

"Lu Rui". The man answered simply, obviously he didn't care that I knew his name.

It was indeed a brother, I muttered in my heart and turned my head to continue walking on the road.

Lu Zhi actually came to this tunnel. The tunnel has not started construction yet. The man named Lu Rui said that this was a survey site, so they should be the early survey personnel.

Only after the survey is completed will someone come to take charge of the construction work. According to the time point of the Red Night travel, it is definitely the Stone Age outside now.

It takes four points to travel to the primitive era. When we go to the era of antique Sangrou, it should be enough to only reach the first time node.

As for why Lu Zhi appeared here, I have no intention of exploring the purpose of their construction of the time tunnel.

But as I walked, the problem arose. There were more than two roads in the cave. This was different from when I came in and was very different from the tunnels restored by Hongye.

I suddenly thought of Lu Rui's words. He just asked Lu Zhi to come in, so I could find my way out by just locking in Lu Zhi's brain waves.

Thinking of this, I quickly released my spiritual network. Fortunately, my mental power could function normally in the cave, and soon I caught a new brain wave.

(.=)

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Chapter completed!