Xu Tiannan did not answer. He just asked Murong Shui to drive to the elevator door of another unit. After he got out of the car and checked, he opened the calculator on his mobile phone and kept calculating something. He quickly replied: "Chen Yan

Went to the 15th floor.”

Murong Shui took a deep breath and said incredulously: "You, you, you...you are not you! How on earth do you know this?"

"Go back to where you were just now, so as not to lose you."

When the two returned to their previous position, Xu Tiannan opened the video on his mobile phone, zoomed in on the screen and pointed at an area and said: "Look here, although the screen of the elevator is blocked, this elevator is designed at a corner, so

A convex reflector used when crossing a car is installed diagonally behind it.”

Murong Shui looked carefully and found that there was a corner mirror standing on the ground in the screen. From their position here, looking towards the corner mirror, they could see the direction of the elevator in the mirror.

But Murong Shui soon discovered the problem again, "That's not right! What the hell did you take with this crappy cell phone? Although there is a display screen in the elevator, who can see clearly this blurry picture?

How many floors has Chen Yan gone to?"

Xu Tiannan said: "What are you thinking about? How can you take a clear picture of the floor from such a distance!"

Murong Shui didn't understand again, "Since you can't take a picture of the elevator display floor, what did you take a picture of?"

Xu Tiannan said: "You can see in the video that after Chen Yan entered the elevator, Butler Ma waited at the door for 25 seconds before leaving. During these 25 seconds, Butler Ma's eyes were fixed on the floor screen at the top of the elevator.

, so I judged that he left only after confirming that the other party had arrived at the reserved floor."

Xu Tiannan opened a web browser on his mobile phone and explained: "I went to another unit to check just now. This elevator is a Mitsubishi brand, so I opened the official website of this brand and found the model number of the elevator.

It was found that the operating speed of this Mitsubishi civil elevator is 2 meters per second."

Looking at Murong Shui's confused look, Xu Tiannan continued to explain: "It is known that the elevator runs at a speed of 2 meters per second, so during the 25 seconds Mabond waited, the elevator ran upwards about 50 meters. According to the 2008 edition of "Architectural Design"

and Fire Protection Code" stipulates that the floor height of underground parking lots is not less than 4.8 meters, the height of residential buildings is not less than 2.8 meters, and the thickness of the cast-in-place concrete layer of the floor slab is not less than 100 mm. So if the basement floor is plus or minus zero, then the calculation

After Chen Yan took the elevator for 50 meters, he subtracted the height of the basement from 50 meters, and then divided it by the total height of the residential floor and the floor. The resulting data just corresponded to the height of the 15th floor. If the midway

When someone gets on the elevator, it takes about 8 seconds to open and close the elevator door. Therefore, the floors Chen Yan may go to are the 4th floor, the 10th floor, and the 15th floor. Since it is working time, there is a possibility that someone will board the elevator midway.

It’s very low, so the floor that Chen Yan most likely goes to is the 15th floor. Do you understand?” (Note)

At this time, Murong Shui seemed a little dull. He unscrewed the bottle of Coke and took two sips. After a long burp, he slowly said: "Would you like to drink Coke?"

…

In less than 20 minutes, Chen Yan walked out of the elevator alone again. Mabondang also walked out of the car immediately, picked up a hair roller and scratched the other person's legs for a while, and then the two left.

Xu Tiannan said: This Chen Yan, he is indeed looking for a lover."

Although Murong Shui didn't understand the floor analysis just now, she immediately perked up when the other party mentioned clues about the extramarital mistress.

"How do you know? Tell me quickly."

Xu Tiannan explained: "Before Chen Yan went upstairs just now, I took a picture of a small movement, that is, he took off his ring and gave it to Butler Ma for safekeeping."

Murong Shui added: "Well, I understand this. Generally speaking, if a man still has feelings for his wife or feels indebted to his family, you men will take off your wedding ring when an extramarital affair occurs to reduce the risk of cheating.

Guilt.”

Xu Tiannan: "Pay attention to your wording and remove the word 'you' from me."

Murong Shui stuck out his tongue, and Xu Tiannan continued to explain: "And I also noticed a detail, that is, before Chen Yan got on the elevator, he handed his coat to Butler Ma. Similarly, after he got off the elevator, Ma

The butler also sprayed some kind of spray on the other person's body. I guessed it was a deodorant to neutralize the smell of the perfume. When Butler Ma used a hair roller to remove the dog hair on the other person's body, I could tell that Chen Yan

My mistress is a dog owner, we can make good use of this."

Murong Shui puzzled: "How can you be sure that the hair on Chen Yan's body is dog hair? Couldn't it be hair from the sofa? Or hair from his mistress's clothes?"

Xu Tiannan said: "Your observation is not careful. Didn't you notice that Ma Guanjia just cleaned Chen Yan's legs with the hair roller? This means that Chen Yan will not take the initiative to touch things that shed hair, but

His mistress’s dog is very familiar with him.”

While the two were talking, the elevator had reached the 15th floor, but the 15th floor was designed with four households per elevator. Murong Shui was dumbfounded and asked: "This... there are four households here, who knows that Chen Yan

Where does your mistress live?"

Xu Tiannan carefully observed the door of each house for a while, and whispered: "His mistress... lives in 1502, the second house."

"Ah?" Murong Shui asked, "How can you tell?"

Xu Tiannan pointed to the door of room 1501 and whispered: "Look, there is a shoe cabinet at the door of this house. There are many shoes of different sizes in it, which means there are several people living in this house."

After finishing speaking, Xu Tiannan pointed to the door of room 1503 and continued to explain: "The doormats at the door of this house are very dirty, and there is cement dust around them, which means that the owner of this house works in a construction site with poor sanitary environment.

I work somewhere, so that’s also excluded.”

Murong Shui said: "What if Chen Yan's mistress likes to play in the mud at the construction site in her spare time?"

"Be more serious!" Xu Tiannan glared at the other party and pointed to the iron fire box at the door of Room 1504. This fire box was about 1 meter above the ground, but there was a "tip" stuck on the sharp corner of the bottom of the iron box.

Corner Protective Cover".

"You see, this family has affixed a sharp-corner protective cover here, which means that they have a child, about 1 meter tall, about 5 years old. It is also impossible for him to be Chen Yan's mistress. There are four families here. Since we all

Three families have been eliminated, Chen Yan’s mistress must be..."

Murong Shui suddenly said: "Is it possible..."

"Shut up!" Xu Tiannan suddenly interrupted: "I knew you were going to ask, 'Is it possible for Chen Yan to find a mistress with children'!"

Murong Shui said aggrievedly: "No...I didn't want to ask that."

"Then what do you want to ask?"
Chapter completed!