Detective Conan: Knifeman? I'm a good citizen of Beihua

The next day, at the Poirot Café.

"Well--"

Maori Kogoro yawned lazily and said to Amuro Toru with an apologetic look, "I'm sorry, Amuro-kun. I originally planned to come back yesterday afternoon to get a sandwich, but plans couldn't keep up with changes, so I stayed outside yesterday."

"Ah, it's okay."

Amuro Toru took out the sandwich he had packed yesterday and said, "I put it in the refrigerator, but it might not taste as good."

"no problem, no problem."

As he spoke, Maori Kogoro yawned again. He rubbed his face and added to Amuro Toru: "Please make me a cup of coffee, Amuro-kun."

"it is good."

Shirakawa Qiu walked over and looked at the tired-looking Maori Kogoro and Conan beside him, who was pecking at rice like a chicken, with a puzzled look on his face: "Mr. Maori, what happened to you... didn't you get enough rest?"

Why do you look so tired?

"Oh, I don't know what happened. I didn't sleep well last night..." Maori Kogoro waved his hand, "I originally planned to let this brat go back upstairs with Xiaolan to catch up on some sleep, but this brat insisted on following me, so I can only bear it like this."

After he finished speaking, Conan pecked his head and immediately woke up.

"Hey, are you ready to go?"

The child sat up straight immediately.

Maori Kogoro frowned and held his forehead: "Please, give me another cup of hot milk to wake this kid up."

Conan looked at Shirakawa Qiu: "Actually, I would rather drink coffee..."

Baichuan Qiu showed a gentle but polite smile: "Sorry, Conan, you are too young to drink coffee."

Conan pouted: "Just once."

"No, drinking too much will affect your growth. Be careful not to grow tall in the future."

Conan: "Uh uh—"

Damn, is Mr. Shirakawa implying something about Kudo Shinichi's height?

Conan gritted his teeth and gave Baichuan Qiu a sweet smile: "Thank you, Mr. Baichuan..."

Baichuan Qiu: "You're welcome."

He quickly made Conan some hot milk and casually asked, "Mr. Maori, what were you busy with yesterday? Why are you in such a bad mood?"

When Kogoro Mouri heard this, he immediately became excited and slammed his hand on the table.

"I suspect we were possessed by evil spirits yesterday!"

Amuro Toru and Shirakawa Akira put down their coffee and milk at the same time, their eyes popping with surprise: "Huh?"

Wha, what?

Bai Chuanqiu asked the system uncertainly: "Tongzi, is this a pure scientific world?"

There's nothing else mixed in...

System: "Don't worry, host. Aside from the somewhat unscientific Kaito Kidd, this is a pure science world. We must practice science."

Bai Chuanqiu breathed a sigh of relief: "Then I feel relieved."

So what happened to Kogoro Mori?

Under the two people's expectant and curious gazes, Kogoro Mouri told them what happened yesterday.

Yesterday, Maori and his group followed Yoko Nakata to the construction site.

They found that although the work there had been stopped for some time, because a new company took over, the construction team was still ready to start work at any time. The surrounding situation was not desolate. On the contrary, there were already completed buildings, and people walked back and forth from time to time. It was completely different from those spooky places in their impression.

Everyone walked around the construction site and didn't find anything strange or unusual.

This is very strange.

Kogoro Mori was puzzled.

How could such a place have so many problems? It couldn't really be because of bad feng shui, right?

So out of the desire to explore and gain knowledge, Kogoro Mori and his group decided to stay on the construction site for one night.

Anyway, there are people at the construction site, so they might as well experience it in person and maybe make some new discoveries.

So Yoko Nakata communicated with the construction site manager and asked them to make room in the dormitory for Maori and his team to stay temporarily, trying to find out the reason why the workers were in a trance.

——What a result, when I woke up, I felt like I had fallen asleep, but I didn’t sleep well.

Kogoro Mouri finally understood why the workers were often absent-minded and always made small mistakes at work.

They just didn't get a good rest for one night, but those people have been in this environment for a long time, how could they sleep well?

A bad sleep will make people more depressed and their condition will plummet.

How can the workers do their work properly under such circumstances?

Hearing this, Amuro Toru asked curiously, "Did Mr. Maori find the problem?"

Maori Kogoro scratched his head: "Strangely, I haven't found the reason so far."

It's a really depressing feeling. My body feels heavy, as if evil spirits have really entered my body.

Of course, Kogoro Mouri also knew that this was mostly due to their poor sleep quality.

Baichuan Qiu thought for a moment, then suddenly looked at Conan: "Conan, did you find anything?"

Conan, who was suddenly called out, said: "Huh?"

He paused drinking his milk, stole a glance at Maori Kogoro beside him, and suggested rather tactfully, "Well, if I must say, I feel like they seem a bit noisy over there at night."

"Is it a sound problem?" asked Toru Amuro.

Maori Kogoro felt strange: "I didn't seem to hear any sound last night——"

He picked up Conan and said, "You little brat, why didn't you tell me then?"

What if it's some important clue...

Conan pretended to be innocent: "That was the sound of electricity in the motor room next door. I thought my uncle heard it."

Maori Kogoro was stunned for a moment: "Electric current sound?"

In my impression, it seems...

Baichuanqiu helped Conan explain: "In fact, the sound pollution is very serious nowadays. Everyone has become accustomed to these sounds, so most people generally can't hear them."

In the public's perception, environmental pollution generally refers to air pollution, water pollution, soil pollution, etc. However, there are also pollution problems such as sound pollution and light pollution that are ignored by most people.

Noise pollution is common on roads and construction sites, and has a great impact on people's hearing and mental state.

If people stay in such an environment for a long time, even if they don’t realize that they “hear” these sounds, their auditory cells will be in an excited state for a long time, which will greatly interfere with their physiological hormones and cause many problems.

Amuro Toru also thought a lot: "If your accommodation is very close to the engine room, your sleep at night may indeed be greatly affected. Because the sound of electricity will continuously stimulate your nerves, the rhythm of your brain waves will be disrupted, and you may frequently switch back and forth between light sleep and deep sleep."

How can I sleep well in this situation?

He frowned. "Who planned this accommodation area? It's totally unreasonable."

The motor room itself has extremely strong noise and safety hazards, and being so close to the workers' dormitory is a complete violation of relevant regulations.

This kind of guy is either stupid or bad.