"If one of these parts emits a key sound, would it not affect the whole expansive area with such a noise?"

"It might be possible, but such sounds should carry great pressure. Ordinary noises wouldn't make every floor feel this way."

"A loud noise? If there really is a loud noise, then we should be able to hear it or see it on the surveillance cameras, right?"

"That's why we aren't able to see this thing."

"If, and I'm just speculating here, we search layer by layer like this, do you think we'll find any clues?"

"I think it's pointless, and it's a waste of time to search like this. Moreover, by searching this way, we've likely already alarmed anyone who might be involved, and at this point, there won't be any findings."

"Do you mean that if someone really is interfering, every move we make here is also likely to expose us?"

"Yes, that's exactly it."

"Can't you block the surveillance camera?"

"Blocking it is possible, but now isn't the best time for that. We can't use this method unless it's absolutely necessary."

Anying always acts with careful consideration, knowing exactly when to act and when not to.

Ye Chen thought carefully about what Anying said, finding it indeed logical, so he followed Anying and went in that direction.

"Okay, since we can't find anything wrong here, can we go up to the rooftop? I remember this place should be accessible to the rooftop. Moreover, there should be vents and natural skylights on the rooftop. Can we find anything from there?"

Although Ye Chen said this, Anying probably understood that if they can't find any clues here, they won't find any there either.

But as they were about to head in that direction, Anying suddenly stopped.

At that moment, Ye Chen didn't understand what was happening, but he knew Anying always acts very cautiously.

Since Anying chose to stop now, it must mean he discovered something.

"What's wrong? Is there something?"

"Did you feel it when we walked past here? It seemed like a cool breeze coming up my leg."

"Cool breeze? Impossible, we just came down here, all the doors were closed, and there wasn't any place for ventilation."

Ye Chen didn't feel it, so he walked the path again, but again felt nothing.

"No, I clearly felt it, my tactile nerves are very sensitive. Don't worry, let me feel it again."

After finishing his words, Anying took a deep breath, closed his eyes, and slowly sensed his surroundings, moving his body slowly back and forth.

When he reached the middle, Anying suddenly stopped again, then he slightly opened his eyes, looked down, and quickly his brows furrowed together.

"What's wrong? Is there a problem?"

"This place, there's something wrong with this place."

"What? What's wrong with this place? Isn't this just an ordinary floor tile?"

What Ye Chen saw under Anying's feet was a beige floor tile, about 1 meter by 1 meter.

"No, there's a hollow space beneath here, and that draft I mentioned, it's coming from this gap."

"Gap?"

Ye Chen didn't notice, but after hearing all this, he walked over, bent down, and carefully inspected the gap, then turned to check another gap.

Seemingly unsatisfied, he placed his hand gently on the gap, trying to feel something there.

"If you hadn't mentioned it, I wouldn't have noticed the wind blowing towards my hand from the four gaps around this tile, but it's very faint."

"Yes, so I'm saying there is something wrong with this place."

"If that's really the case, what does all this imply?"

"It implies that this place can be opened, and below it, there might either be an air duct or a vent, likely with a mechanical device on top."

"According to the map we have, could this site exist here because of this equipment?"

"I didn't see it on the map, and even if there were such ventilation equipment, we wouldn't need to install it here, unless there's even more space underneath."

"You mean, this is now the first basement, and there's more space beneath?"

"Yes, that should be the case. However, I remember the drawings; there's definitely an underground parking garage on basement level two, but this spot is in a completely opposite direction from where the garage is marked, so it's definitely not positioned over the garage."

Ye Chen nodded slightly, seeming to understand that this situation was indeed somewhat different from what he had imagined.

"So there must be a mysterious space below this, and what exactly is found there, nobody knows, but can we be sure that this site is accessed by someone, and that the entire hallway's variations, including changes in lighting, water color, and the sounds of wind, are all controlled from this underground space?"

"Exactly, I am now one hundred percent certain of that."

"If that is the case, can such a device potentially reveal the true access point?"

"Right now, it's hard to say. We've only found this vent for now, and based on the map, I could speculate where it might lock onto, but it's not something we can achieve just yet."