Chapter 567

"Why am I naive!"

Ah Xiang is a little unconvinced and has a small mouth. Her pretty face deliberately sets an unhappy expression.

"Any industry has its own rules. Apartments like them are still chain. Even if the room is rotten and empty, people will not rent it at a lower price."

Zhong Tianzheng shrugged with a smile: "for a very simple example, there must be many shared houses in Shangnan city. It is very common for a two bedroom and one living room to be changed into three bedrooms and four bedrooms by the second landlord. There are many more terrible ones to be changed into five bedrooms. He rents out in the face of different groups."

"Like apartments, they are generally rented by white-collar workers or small couples. If you don't give concessions, people will rent them. If you don't need them, your preferential effect is not great. It's better to maintain the brand effect."

"Similar to this kind of apartment, the rent is much higher than that of the shared house. If you calculate the water and electricity fee, they must charge it according to one yuan and fifty-one degrees, which is more than twice and three times higher than that for civil use. Especially in summer, when the air conditioner is turned on, there are hundreds of them in a month. How can there be such a good market."

"Well..."

Ah, Xiangwen smacked his tongue and said, "how do you know so much? Did you work as a real estate agent before?"

"Don't worry, I can't make that money."

Zhong Tianzheng waved his hand and stopped talking. He stood directly under the monitoring, squinting at the whole channel and all his thoughts.

"Who put up this boar page's balloon?" Ah Xiang also looked up at the monitor. Daimei said, "could it be the accomplice of the murderer? The two colluded. OK, the murderer gave him a signal in the house, and then he raised the balloon?"

"Not necessarily?"

Zhong Tianzheng's tone is like answering Ah Xiang's question, and it seems to be asking himself: "the two people appear at the scene together. The goal is too big, and it's easy to be suspicious."

"Who put this boar page on it?"

"Maybe it ran up by itself."

Zhong Tianzheng whispered and stared at the camera in the corridor.

Because the floor is not very long, only two probes are set in the apartment when setting floor monitoring.

One is facing the elevator.

One facing the corridor.

It can master the situation of the whole floor without redundant equipment.

So.

No picture can see what will happen under this surveillance.

……

Not long.

The elevator door is open.

The cleaning aunt came over under the leadership of the apartment administrator. Looking at the crowd in police uniforms, she was a little flustered. Her fingers grabbed the hem of her clothes and was embarrassed.

"Don't panic."

Zhong Tianzheng took a step forward and took the lead in opening his mouth before the police officer opened his mouth: "I want to ask you a question. It's very simple. It'll be all right after asking."

"Well... Ok..."

The cleaning aunt nodded, glanced at Zhong Tianzheng's sunny smile, felt the affinity, and the whole person's expression relaxed a lot.

Zhong Tianzheng asked, "you came to clean this morning, didn't you?"

"Yes."

"Then you found some boar Paige's balloons. You pulled them away, didn't you?"

"Yes."

"I thought no one wanted it, so I took the balloon back to my granddaughter to play with. If you want it, I'll get it back and give it back to you."

On her way here, she heard about what happened in the apartment. Now the police called her. How can she not panic, even if it has nothing to do with herself.

"Auntie, I said, don't panic."

Zhong Tianzheng smiled and shook his head. "What I want to ask you is not this. What I want to ask you is, when you went upstairs to the fifth floor and saw the balloon, did you find any difference on the ground below it?"

"Different? No. "

Baojie aunt looked suspiciously at Zhong Tianzheng, shook her head and denied: "there is no blood, it is a very clean thing."

"Is there any water stain on the ground!"

Zhong Tianzheng was just afraid that she would mislead her aunt by saying it directly, so she let her recall it by herself.

As a result, Bao Jie's aunt kept thinking about the case. He had to take the initiative to say his guess: "there is no dry water stain on the ground. Then, the rope at the end of the boar page balloon also tied a knot, which is similar to tying things."

"Yes!"

Aunt Bao was as like as two peas in excitement: "what you said is right. It was exactly the same as you said. When I came up, I saw the wild pig's balloon and pulled it down."

“？？？”

A trace of surprise flashed in the eyes of the policeman on the side.

The heart said how Zhong Tianzheng knew there was a pool of water stains below.

"OK."

Zhong Tian nodded and asked, "is the balloon still there? You'll give it back to us later. "

"Don't worry, it's still there."

The cleaning aunt nodded: "at that time, I thought the rope was ugly. I cut it when I got home."

“……”

Zhong Tianzheng was speechless for a while.

What he wants is this string of knots so that he can infer when the killer left.

"Well, I'll go back with my aunt later, get the string of knots back and send them to the technology department."

Zhong Tianzheng gave an order, then noticed the confused eyes of the people, and then explained: "at the beginning, I was wondering if there was an accomplice outside to help patch's balloon rise to block the camera."

"But then I overturned the idea. If there was only one murderer, the boar page's balloon would rise. You can tie it with an ice block below. As long as the weight of the ice is greater than the tensile force of hydrogen, the balloon will not rise."

"With the advance of time, the ice gradually melts. When it melts to a certain extent, the balloon will naturally rise to block the camera. As long as the murderer calculates the time, he can come out of the room without being seen by the camera."

"Yes!"

"That's the truth!"

Under Zhong Tianzheng's explanation, everyone suddenly realized.

There is a pool of water on the ground, which is just in line with Zhong Tianzheng's conjecture.

"Last night, the temperature was about 23 degrees. The indoor temperature may be a little higher, but the difference is not bad. Take the balloon back and calculate the tensile force of the three balloons, and then calculate the approximate size of the ice according to the knot."

"The temperature is constant. The melting speed of ice is related to its surface area. As long as the melting time is calculated, we can lock when the killer left."

"Determine the time when the killer left, you can screen out the monitoring of the whole apartment and even the surrounding roads at that time, and catch the figure of this person."