"The presence of air currents here proves that there are pipelines in operation, but exactly how they function, I am still unclear. If we reach the negative first floor, maybe, we might understand the working principle behind this."

"Let's go, don't waste any more time, move quickly."

Ye Chen had developed a strong interest in this matter, and it was clear that it was all manually controlled.

Although up till now it's still unknown how exactly these people tampered with the lights, at least it's known that someone has made changes.

The two rushed towards the elevator and hurried along the way.

At this moment, Captain Yang had been constantly following this team member, staring distressingly at the screen.

At that time, the two stayed in the restroom for about 5 minutes and then hurried back to the office,

In the office, they spent around two minutes before taking the elevator down again.

He was puzzled, not knowing what all this meant, but when he saw the floor selection, he finally understood that he must have been looking for clues from the ventilation duct machinery room.

"Captain Yang, look, he should be going to the Main Machine Room now."

"There is no point in that, many people have been down there before, and nothing of significance was ever discovered, what he's doing now is just futile."

"So, you're saying, he just stayed there for 5 minutes, then went back to his office, what did he do in his office?"

"I'm not sure, maybe he was scared and went back to regain some strength, or simply couldn't think of a better approach."

"Also, not only the Main Machine Room but our underground pipeline wells and the main water pipe outlet should also be by that small room next to the negative one floor's machine room."

"No problem, people have visited that place before too and he won't find anything from there, so you don't really need to concern yourself with it."

"I guess, he will also come out empty-handed tonight, I thought that with his eager investigation, he might have some profound skills, but it seems now, just like most other residents, they use the same methods."

"Yes, so it's nothing special, let it be, we just observe the changes here and see what he will do next."

After seeing all this, for some reason, Captain Yang suddenly felt a lot more relaxed.

The arrival of Ye Chen gave him a tremendous sense of pressure, but after seeing today's actions, he feels that this pressure doesn't necessarily need to exist.

After the two reached the negative first floor, luckily, the lighting was still relatively bright, they just looked forward down a wall prominently marked with a map.

It clearly marked the location of the Main Machine Room, and then they hurried over without finishing copying it.

"Right, it should be this location."

Anying spoke, then pointed at the door, Ye Chen nodded and pulled on it, unexpectedly, the door was open.

Ye Chen frowned, wondering how such a critical location could have its doors open? According to normal management rules, these doors must be locked.

Once inside, they could hear the rumbling sound of machinery at work.

All the HVAC modules, including all equipment, were now contained within this massive room.

"Which part is responsible for ventilation?"

They pointed in a direction, and Anying simply nodded, and then walked towards the direction indicated.

"Yes, this should be the air conditioning refrigeration equipment. If it's about ventilation, then according to the air conditioning, it should be right next to it, the location should be here."

Anying quickly recognized one of the machines, which was about 10 meters long and as tall as a person.

Anying approached it and saw indeed there were some control panels, they looked carefully, but from it, they simply could not decipher any problems.

"If we go by this pressure indicator, do you see? All the pressure readings are normal, which means this machine hasn't started working yet."

"If it hasn't started working, then where exactly is this air sound in the ventilation duct coming from?"

"Well, that needs to be investigated, in any case, this place can't emit anything."

"If it hasn't started up, then the sounds must be coming from somewhere else. I am correct, aren't I?"

"Yes, you're right, it should be like that."

"I was thinking that we might be able to uncover something here, but it looks like we found nothing and I believe other people would probably get the same result."

"I guess it should be like that then."

"Well, let's go, since there isn't anything to see here, we are just wasting time."

After finishing speaking, the two walked out directly from there.

"This place is the water room, which means all the water pipes should be buried here, right?"

"Yes, that should be the case. Since we are here, let's go in and take a look."

Saying so, he pointed in that direction and walked over, similarly, this door was also not locked, they opened the door quite easily.

Inside there were several large pipes distributed, and there was no visible water since all the pipes were sealed.

Anying looked around and found no breakthrough points, hence they didn't continue wasting time here.

The two came out from underneath feeling like they had virtually gained nothing.

"So, what should we do now?"

"All the ventilation ducts, in fact, are all in one main duct and are interconnected, with each floor having distribution."