He Li rushed forward and grabbed Xu Zhenguo, but Xu Zhenguo was frightened by He Li's behavior.

"What the hell, what are you doing, are you trying to kill me?" Xu Zhenguo shouted loudly.

He Li explained while dragging Xu Zhenguo: "I really thought you were going to jump!"

"If I want to jump, how can you stop me?" Xu Zhenguo turned around and smiled, "But it's okay, I feel safer if you hold me like this."

After Xu Zhenguo finished speaking, he continued to lean out. He first frowned and stared upward for a while, then looked at the walls on the left and right carefully, and finally looked down again.

"Hey, come on, I feel like I'm about to fall when I look down from the ninth floor. Do you think you'll wet your pants if you stand on top of a skyscraper with more than 100 floors?"

He Li saw Xu Zhenguo shrinking back, so he dragged him back to the room.

Xu Zhenguo patted the rainwater from his hair, then walked back to the living room and picked up his suitcase.

He said to Zhou Quan: "The next job will be left to you."

Zhou Quan curled his lips and said, "Then you two should get out quickly and don't get in the way."

After Zhou Quan finished speaking, he took out a disposable mask from the tool box and put it on his face.

He Lizheng was wondering what Zhou Quan was going to do, but was dragged out of the door by Xu Zhenguo.

He Li, who was standing in the corridor, could not understand Xu Zhenguo's so-called "investigation experiment" at all. He waited for Xu Zhenguo to open the door and light a cigarette and took the opportunity to ask: "Old Xu, what are you simulating?"

Xu Zhenguo took back the lighter and said: "Remember the video playback I watched yesterday. Although it was played at 16x or 32x speed, there was one detail in it that particularly impressed me."

"Impressed?"

"Do you remember that four minutes after Zhang Yunhao entered Room 902, the light in the corridor suddenly turned on?"

"What's so strange about this?"

Xu Zhenguo slowly blew out a smoke ring: "Because the lights in the corridor are voice-activated lights, the lights will only light up when the sound reaches a certain decibel. This situation aroused my curiosity - how loud the sound can make the voice-activated lights turn on themselves.

Light up?"

"So the first experiment is to test the voice-activated light?" He Li asked.

"Yes, the results of the experiment are similar to what I expected. Although the sensitivity of the voice-activated lights is very high, the sound insulation of the security door in Room 902 is also very good. I spent a lot of effort in the room to switch the voice-activated lights in the corridor

Brighten it up. Do you know what this means?"

Faced with Xu Zhenguo's question, He Li was a little at a loss: "Does it mean that the quality of the door is very good?"

"Why did I put so much effort into inspecting Qu Yanan's house?" Xu Zhenguo frowned, "Placing the suitcase normally will not cause the voice-activated light to light up. After testing the voice-activated light, I think Li Lianbo and Zhang Yunhao are here

It is very likely that there was a heated argument in the room, and it may even be more serious than the argument."

"Then what kind of experiment are you doing outside the window?"

Xu Zhenguo blew out a puff of smoke: "I did this because I wanted to solve the so-called secret room mystery as soon as possible."

"Then why lean out the window?"

"Zhou Quan conducted a detailed inspection of the room last night and ruled out the possibility of a secret passage or mechanism. So there are only two ways to get out of Room 902, one is to get out through the door, and the other is through

The window came out. Combining the video we viewed yesterday and the video Lin Wei viewed this morning, we can basically rule out the way the two walked out of the door."

"So the only way left is to come out of the window?"

"That's what it looks like so far."

"But there are so many windows in the room, why are you only looking at the kitchen window?"

"Feel."

"Feeling?" He Li asked in surprise.

"Yes, it's a feeling, but it's not entirely a conjecture. It's just that there is no evidence to support it yet." Xu Zhenguo explained.

"But this is the ninth floor. How can ordinary people climb out from the ninth floor?"

Xu Zhenguo sighed and said, "But other than that, there is no other way."

He Li racked his brains and couldn't think of a third way to escape besides doors and windows, so he had to ask: "Then how can I get out of the window in a more common-sense way?"

"It's impossible to confirm whether the other windows are locked, and I haven't figured out a common way to escape yet, but there are a lot of unconventional ways."

He Li joked: "That package doesn't include time travel?"

"You kid can play until you die." Xu Zhenguo finished smoking and laughed, "Remember the eight people I pulled out of the portfolio given to me by Lu Shengli this morning?"

"I remember the house number, but I can't remember the name of the owner."

"I just carefully checked the specific arrangement of these rooms outside the window, and some rooms can be eliminated directly."

"Are these four rooms 801, 803, 1001 and 1003?"

He Li believed that the four rooms on the diagonal line of Room 902 could be excluded. Judging from the overall layout of the building, it was simply impossible to climb into these rooms through the windows.

"Yes, but it's not limited to these four rooms."

"Which other room can be excluded?"

Xu Zhenguo raised one hand and pointed to the door on the opposite side of the corridor: "Room 901."

Then he pointed his finger behind his head: "There is also room 903."

"Why are these two rooms excluded?"

"Room 901, Room 902 and Room 903 are laid out horizontally. Although at first glance, the straight line distance between the three rooms is the shortest, there is no way to climb between two rooms with bare hands."

He Li scratched his nose and asked: "Old Xu, if a wooden board is fixed between the outer walls of the two rooms, and two people step on the wooden board to enter the two rooms... is this method feasible?"

Xu Zhenguo smiled softly: "Why do you mean it sounds like the long sky plank road on Mount Huashan?"

"Yes, yes, when you mention these three rooms, the first thing that comes to my mind is the Long Sky Plank Road."

"My answer is, no."

"Why?"

"The answer is obvious. The feasibility of this method is almost zero. Your idea is too naive." Xu Zhenguo lit the cigarette butt on the ground, "But if you insist on trying it, I can help you complete this experiment."

He Li smiled bitterly and said, "Don't tease me."

At this time, He Li thought of another question: "Can we check the surveillance videos of the above-mentioned rooms? Maybe we can see these two people?"

"I asked Lu Shengli this question last night. In fact, most homeowners buy Binjiang Garden just for investment, not for living housing. Many homeowners do not go to the property management company to go through the registration procedures first after buying a house.

There is no contact information for the homeowners, so most of the fingerprint lock monitoring has not been activated. People like Qu Yanan are just an exception. In fact, most houses do not have any surveillance video. It can only be said that we are gone.

Good luck. But the specific situation can only be found out by comparing the owner's information."

"Then when I go back, should I research and judge the information about the other homeowners?"

Xu Zhenguo said happily: "Congratulations, you are all ready to answer!"

At this moment, the door of Room 902 gradually opened, and He Li smelled a pungent smell.

He had no idea what Zhou Quan was doing in the room, and he was worried that he would be laughed at by Zhou Quan, so he quickly asked Xu Zhenguo in a low voice: "What's the smell?"

"This is the smell of luminol reagent."
Chapter completed!