Determining this point can be said to be crucial to Longyun's action planning.

Because if this is the case, this clear series of shoe prints also means one thing: no matter where this mysterious figure is and what the purpose of entering the "dead city" is, judging from the fact that he left no trace of his actions, he should not know the latter, that is, the existence of his Long Yun.

In this case, he first discovered the traces of the opponent, but the opponent is likely to be ignorant, and this situation of the enemy is clear and secret, which is a very favorable condition for the next action.

Thinking of this, Long Yun basically calmed down, he probably glanced at the surroundings and found that this doorway was nothing more than a short, narrow walkway; There was a bend at the end of the walkway, and bright light came in from the other end, and the sand on the ground was probably scraped in from that side.

So, maybe that's the way to the inside of the wall?

After discovering the threat, Long Yun's every move became more cautious. Careful to step on the shoe prints on the ground to avoid leaving too obvious traces of movement, he tiptoed through the narrow, short hallway, turning a corner, and found himself inside the walls of the core complex.

Looking out at the exit of the corridor for a moment, the current Long Yun is not only brisk, but also extremely alert, because after approaching the core area of the base, the strange feeling in his heart has always been very strong, he is not sure at all whether his consciousness snooping technique can still work in this strange place, so he must rely on keen vision, hearing and careful observation and analysis to search for the opponent's traces.

Like a stealthy stealthy assassin, he crept slowly and cautiously into the vast base complex, entering the nearest massive building.

Stop at one of the corners of a huge building. It was repeatedly confirmed that there was nothing unusual in the vicinity, and that no trace of a mysterious person had been found. He slowly sat down and rested for a moment. Take a big breath in the dry air of the building, which smells of dust.

Holding his breath and concentrating on the Consciousness Snooping Technique, Long Yun searched intently for a long time, but he didn't find any signs of human existence around him, but he wasn't sure if it was because there was really no one nearby, or if his superpowers were disturbed by mysterious powers and couldn't be used. But no matter what, he now makes an assumption: the guy who arrived before him is even a superpower, since he can't use his superpowers here, it is estimated that he can't either, so the two are tantamount to standing on the same starting line. Maybe he still has the opportunity to use the advantage of the enemy to find out and find out the purpose of his infiltration.

Okay, there's no danger of being detected for the time being, so what's next?

After repeatedly confirming that the snooping of consciousness did not respond, or that it was temporarily ineffective, Long Yun pondered for a moment and decided to continue his search and exploration.

Not to mention that mysterious person, is he still staying in the core building area at this time, judging from the supplies he Long Yun carried, he is not allowed to wait in the dead city for a long time, and only by acting quickly and quickly can he complete the task. With such thoughts. Acting stealthily like a real scout, Long Yun probed inside the building with a gun in both hands. Nothing special was found other than a few bodies inside, so he left the building and ventured into an even larger building in front of him.

Arriving at the dusty road at the front of the building, he unsurprisingly found more shoe prints intermittently, and followed the path of the mysterious figure through the failed electronic door to the first floor of the massive building.

Walking through the door of the building and navigating through the dimly lit corridor, Long Yun cautiously observed the surroundings while inadvertently looking at the surrounding scene; In the silence and dust of the huge building, the sunlight shining through the high ventilation windows is refracted by the particles in the air, and the scenery in the field of vision seems to have a vague pale yellow hue. Being in such a bizarre scene, hearing the sound of his own slight breathing, Long Yun only felt that it was really too quiet here, and it made people feel a little panicked.

In this way, after passing through a long and almost labyrinthine corridor and internal area, Long Yun entered what appeared to be a large hall in the building, and he stood next to the main entrance, several meters high, looking at the scene in front of him.

He had never seen such a building structure.

Since entering the strange "dead city", he has seen not too few strange scenes, but when he really entered the core complex roughly marked on the map, he still felt a little unbelievable what he saw and heard, especially the indescribable building structure in front of him.

In front of him, in the dim light cast from an unknown height, the vast vault space, which could barely be seen, was almost completely filled with a thick structure of unprecedented size and size; On closer inspection, the wide façade with a dark black hue seems to be the side of some kind of airtight architectural structure, and the black surface with no ceiling left a strange impression on him at first glance:

What he saw was a black wall.

Right in front of Long Yun's eyes, this black wall, which was more than twenty meters tall and stretched left and right, could barely see the border in the dim scene. After stopping and looking at the same place for a long time, he still couldn't figure out what the black wall meant, and he repeatedly confirmed that there was no sign of other people's activities nearby, and then slowly walked forward.

As he hesitated forward, the strange feeling of familiarity grew stronger; After struggling to reach the depths of the main building, Long Yun subconsciously felt that the thing that brought him this strange feeling, and could even be said to have summoned him, was hidden behind this pitch-black wall.

What will it be like behind this wall?

Long Yun didn't deliberately think about it, and now his thinking ability was almost all attracted by the wall in front of him.

As he approached, he saw that the tall and wide black wall seemed to be made of metal, and the structure was not sophisticated, but rather rough, and it looked a bit like a hastily made of impromptu work. I don't know if it's the dull tone of black, or the staggered concave and convex structure on the wall, the whole wall feels quite heavy and has an inexplicable sense of oppression, Long Yun subconsciously guessed, he even felt that the thickness of this wall would be more than one meter.

Over here...... Is it the heart of the "dead city"?

Or is it the terrible source of the "death" that caused "Rome" to become a "dead place"?

Stepping into a huge space that had not been set foot in for many years, Long Yun quietly approached the huge wall in front of him, until he was less than half a meter away from the wall, and he could reach out and touch the rough and dull metal surface.

Standing here, without any attention, Long Yun could also feel the mysterious aura emanating from behind the wall. If, this breath can also be described in terms of field theory, then it is clear that he is now very close to the core of the entire aura field; But as far as his own feelings were concerned, Long Yun felt that his subjective feelings did not have a drastic tendency to increase, although they were indeed stronger than when he first entered the main complex.

However, even if it was not amazing in terms of intensity, Long Yun could feel that the aura of thought emanating from his face seemed to have some irregular fluctuations. This slight fluctuation of thoughts, which he had never felt before, seemed a little messy, but it contained some kind of law; But when he really tried to grasp something, he felt that it was really disorganized and completely clueless.

Subconsciously took another half step forward, and Long Yun was almost about to stick to the black wall; He slowly reached out and placed his hand on the rough surface of the wall.

I don't feel anything special.

Except for a chill in his hands, Long Yun didn't feel anything unusual; This relieved him a little, and after groping for a moment on the rough surface of the wall, he was not only curious about what was behind the wall, but also began to think about another question.

Is this huge structure surrounded by walls completely enclosed?

If so, is there any entrance left?

Taking two steps back and looking around, Long Yun didn't notice any signs of openings in the nearby walls; The familiar feeling was still washing away his consciousness, and Long Yun inadvertently took two steps forward again, leaning his head against the wall, and even tapping it to the surface of the wall.

Yes, he could indeed feel the existence behind the wall; No matter what it was, it was faintly summoning at this time, like a magnet faintly attracting his stream of consciousness.

The feeling of being aware of the calling, if there is nothing, if it is detached but it is incomparably real; It seems to be whispering in the ear, and it is like a breeze blowing through the ends of the hair.

In a trance, as if he was being pulled by this feeling, Long Yun suddenly had a strong desire to come behind the wall to find out; Almost subconsciously, he began to look slowly from side to side, and then began to grope along the seemingly endless wall, looking for an entrance where there might be a zài.

The farther away from the place where you could see your surroundings clearly, the more you left the entrance you had just entered, the dimmer the light became.

As he fumbled and looked up, there was only a faint light in the distance, presumably through a zigzag vent. Such a large space must have been designed to be illuminated by artificial light sources, and now all electronic devices are useless, and even basic lighting is impossible. Fortunately, Long Yun's keen dark vision helped a lot, and near the almost pitch-black wall, he could still barely see the surrounding situation clearly, so he slowly searched away.

To Long Yun's surprise, he groped out less than fifteen meters before he found a place that was obviously a door, or rather an entrance.

On the rough surface of the wall, there was a depression about two meters wide and more than his arm's reach, about thirty centimeters deep into the wall; When you touch it with the palm of your hand, you feel that the texture of the sunken part is obviously much smoother, and it should be the door leaf installed as a whole. After groping around the depression for a while, Long Yun found something that seemed to be an access control device next to him, and it seemed that this was indeed the entrance.

However, in the dim light, only a trace of light was seen on the old access control equipment, which was obviously damaged. (To be continued......)