Qiuzhen was much older than Hanrong. But in general, they were both still young. So, without exerting all their strength, they could easily open the lid of the hole.

The inside was a booth. Although the top of the building was about four meters from the roof of the building, the cubicle under the hole was not deep. The bottom of the booth was less than two meters from the hole they had just opened. Quickly, Qiuzhen jumped inside.

"Be careful, Sir!" Hanrong exclaimed.

"Don't worry Hanrong. I'm used to jumping around like this. You see, I'm okay, right?" Qiuzhen answered as soon as he landed in the booth.

The light coming in from the hole was enough to make Qiuzhen observe the booth. It turned out that the length and width of the cubicle were different from the length and width of the building above the service elevators. The size of this cubicle was only about four and a half meters by two and a half meters. So indeed, this booth was a space at the back of the service elevators.

In front of Qiuzhen was a staircase going down. This was very similar to the emergency stairs in the building. Only the stairs in this cubicle were much smaller. The cubicle part, which was the staircase, covered half of the cubicle. So the back of one service elevator was in the form of stairs, while the back of the other service elevator was an empty place that Qiuzhen didn't know its function. But what was clear was that the place could function as a place to rest.

"Hanrong! There are stairs going down here. I'll try to go down this stairs."

Hanrong stuck his head in the hole. "Isn't it dangerous, Sir?"

"It's all right! Dahfeisy Tower is a new building. It was only built a few years ago, right? Now, can you please find some rope? So that later I can more easily climb out of this hole above!"

"Alright, Sir! I'll be down for a while looking for ropes."

"A little time is okay, too. Maybe it will take me quite a bit of time to explore each floor below," Qiuzhen said.

"Alright, Sir!"

"You don't have to close the hole. So, let there be light in here."

"Yes, Sir!"

Soon after that, Hanrong disappeared from Qiuzhen's sight. Qiuzhen realized he couldn't trust Hanrong one hundred percent. But no one else was there. If not Hanrong, who else should Qiuzhen turn to for help? After all, the problem of the secret room in this building was not something that should be covered up.

Qiuzhen took out his flashlight. He pressed the button to turn on the flashlight. Right now, he was feeling very excited. He moved down the stairs carefully. It turned out that it differed from the height of each floor in this building, which reached four meters. The height of each floor in the cubicle behind the service elevator was only two meters. So each floor in the building was equivalent to two floors in the booth.

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Qiuzhen patiently descended the stairs. On every floor, the situation was exactly the same. There were only stairs and an empty booth next to it. Nothing else. The lower he went, the darker the place. The light from the hole above didn't even reach the floor where Qiuzhen was currently at. Good thing the flashlight was new. The battery was also new. So Qiuzhen wasn't worried at all. At least, for the time being.

About fifteen or twenty minutes later, Qiuzhen felt he was already on the ground floor. Of course, it was very possible that Qiuzhen had miscalculated. But it wasn't a big problem because Qiuzhen wanted to see where the stairs ended. Excitedly, he continued down the stairs. After descending a few floors, according to Qiuzhen's calculations, he should be on the B3 floor by now. But, there were still stairs going down in front of him. Meaning that it was confirmed that there was still a floor under the B3 floor. And that floor could be reached by stairs in front of him. Before continuing down to the next floor, Qiuzhen checked the booth beside the stairs.

Qiuzhen discovered something new. Unlike the rooms on the previous floors, which were completely empty, there was a couch in the cubicle next to the stairs. In front of the couch, there was a table. He put off his plan to go down to the next floor. Qiuzhen then sat down on the couch. With his hand, Qiuzhen touched the surface of the table. Both the couch and the table were relatively clean. Qiuzhen then tried to lie there. He fiddled with his flashlight to highlight the entire interior of the small room.

Qiuzhen tried to remember what he witnessed when he was on the B3 floor. The stairs end on the B3 floor. Based on the design drawn in the floor plan, there should still be stairs leading down. However, it could be that the stairs down had been dismantled. Many rooms on the B3 floor were locked. Some rooms were quite large. It was very possible that the staircase leading to the lower floor had been moved into one of the locked rooms. If that's the case, Qiuzhen needed to open all the rooms to find the position of the stairs.

This was impossible because it turned out that Hanrong didn't have all the keys to the rooms on the basement floors. However, at that time, Qiuzhen didn't have to bother looking for the keys to these rooms anymore. In front of his eyes, there was another way to descend to the B4 floor. The small staircase in the small room was probably a secret passage to reach the B4 floor, apart from the official staircase in one of the locked rooms on the B3 floor.

Qiuzhen suddenly remembered that Hanrong was most likely waiting for him on the roof of the building. He quickly got up and walked down the stairs.

This must be the floor between floor B4 and floor B3! I'll call this the B3B floor.

Just like the cubicle on the B3 floor, there was a couch and table in the booth next to the stairs. Now, Qiuzhen didn't stop what he did to trying to sit on the couch. He went straight down again to the next floor. Qiuzhen was excited to go to the floor, which was called the B4 floor in the building plan.

There was no couch in the cubicle next to the stairs on the B4 floor. There was only a door. For a moment, Qiuzhen hesitated about what to do. On the one hand, he wanted to open the door right away and face whatever he came across behind it. On the other, he realized he couldn't keep Hanrong waiting too long. After pondering for a moment, Qiuzhen decided to head back to the rooftop first. He didn't know what he would find behind that door. Later, he would return with much more mature preparations.