"Chen Minhui, you come out!" A man stood in front of the door and knocked, cigarette in his mouth. He impatiently raised his hand and glanced at his watch, "Spit, what do you mean, you called me here and you are not at home." With that, the man lit another cigarette and walked slowly down the safe passage at the back of the hallway.

Xiao Li, a security guard who was patrolling, just came down from the second floor and looked at the man in front of him, who passed by him and didn't even look at him. Xiao Li looked up at the security on the side, he shook his head, and then returned to the security room. He had seen the man in and out of the apartment more than once, and he knew that he was a creditor of the fifth-floor tenant and often came to collect debts.

It seems that he still hasn't got his debts today.

"I thought you were a lucky dog, don't you say that dogs come to get rich, the money hasn't been seen yet, but there are a lot of people who have posted it." Qin Hao tugged at the chain that tied the little monster, Duan Hui kicked the little monster's ass lightly on the side, the little monster stopped and shouted twice at Duan Hui and Qin Hao, and Bai Dijun leaned down and untied the chain around the little monster's neck and hugged it. "Don't blame the little monster, you can't blame him all, right, who let that man rush in so quickly and scare it." The White Emperor affectionately stroked the little monster's head, and the little monster stretched out its long tongue and licked the White Emperor.

The three of them and a dog were wandering on the street, and in the blink of an eye, it was noon, Duan Hui and they walked into a noodle restaurant, "Fill in your stomach first." Qin Hao said.

It happened this morning, a young man hurriedly broke into the office, the three people on the sofa hadn't come back to their senses, the little monster squatting by the door went up to be a pounce, accompanied by a string of screams, the three of them quickly stood up, Qin Hao scurried over the sofa and patted the little monster's head, "Loosen up, you disobedient guy." The little monster let go and ran to the side, and they quickly called a taxi and took the man to the hospital.

I didn't know what that person was doing with the detective agency, so I gave someone a "door opening gift". They took the man to get the injection and decided to go to lunch first and then ask him what was wrong.

After finishing lunch, the three of them planned to go to the hospital to see the man, and as soon as they walked out of the ramen shop, they saw a police car drive in front of them and stop in front of an apartment not far away. The little monster immediately ran after it, "It should be on a leash!" It's running around again! Qin Hao shouted. The three of them also ran after the little monster.

The little monster ran to the side of the police car, the door opened, and Quan Zijin stepped out with one foot and almost stepped on the little monster's head, "Where did the wild dog come from?" Xu Shen got out of the car from the other side, walked around the car and walked to the little monster, "Isn't this the little monster of Duan Hui's office." The little monster barked at Xu Shen and wagged its tail.

"Did something happen?" Duan Hui walked to the two of them, Quan Zijin walked out of the car, and looked at the three familiar people in front of him, "It's you again, it's really you wherever something happens." Xu Shen looked at his watch, "Okay, let's go in first." ”

As soon as he walked to the door, a security guard walked out, "Who called the police?" ”

"It's me." The little security guard said. "Officer, please come with me."

"Why don't you take the elevator up?" The little security guard turned to the safe passage on the side, and Quan Zijin asked suspiciously, "Didn't you say that on the fifth floor, isn't it faster to take the elevator?" Duan Hui looked up at the elevator, it was really simple, this apartment didn't even have monitoring.

"I'm sorry, officer, this elevator broke down this morning, so please take the stairs up." Helpless, they had to follow the little security guard and walk to the fifth floor.

The little monster was the first to reach the fifth floor, and the door to the left was open, and a tall man stood in the doorway. The little monster barked at the man a few times, Qin Hao heard the sound and quickly quickened his pace and rushed up, he hugged the little monster, "Don't make trouble." "Who is this?" Everyone arrived, and they walked in the direction of the man.

"My name is Tatsuya Matsuda, and I'm the president of an overseas direct selling company." The man took out a business card and handed it to them, Xu Shen took it and looked at it. I think I've heard the name, but this guy is Japanese. Why is he here, what the hell is going on. Duan Hui thought to himself.

Everyone walked towards the room together, and found a woman lying on the ground with white granular drugs scattered on the side, Duan Hui walked to the front, took out a handkerchief and picked up the jar on the ground, "sleeping pills......" He continued to reach under the woman's neck and pressed it, there was no pulse, it was already stiff, did he die from taking sleeping pills......

"Eh, how can you mess with the scene?" Quan Zijin wanted to walk up to Duan Hui and lift him out, but Xu Shen pressed his shoulder with one hand, "Don't worry, he's a detective, don't forget that he has solved many cases recently." Quan Zijin glanced at Xu Shen, "Okay." Qin Hao put the little monster in the hands of the White Emperor, "Tie the chain to it." After speaking, he walked towards Duan Hui.

Duan Hui took a closer look at the corpse, the woman looked to be in her thirties, wearing pajamas, and had been dead for more than an hour. Qin Hao squatted beside Duan Hui, "What's wrong, have you found anything?" Duan Hui looked at the corpse with a serious face, and Qin Hao suddenly saw a puddle of liquid under the corpse, "Eh, what is this!" It can't be pee! Duan Hui was attracted by Qin Hao's voice, "Urinate **, wait a minute, this smell is ......" Duan Hui suddenly stood up, "Qin Hao, do you smell it, this smell is ......"

"Gas." Qin Hao responded. "She should have died of gas poisoning."

Gas poisoning, also known as carbon monoxide poisoning. It is a product of incomplete combustion of carbon-containing substances that causes poisoning through respiratory inhalation. The poisoning mechanism is that the affinity of carbon monoxide and hemoglobin is 200~300 times higher than that of oxygen and hemoglobin, so carbon monoxide is easy to combine with hemoglobin to form carboxyhemoglobin, which makes hemoglobin lose its oxygen-carrying ability and effect, causing tissue suffocation. It has a toxic effect on tissue cells throughout the body, especially on the cerebral cortex.

The clinical manifestations are mainly hypoxia, the severity of which is proportional to the saturation of HbCO. Mild patients have headache, weakness, dizziness, dyspnea during labor, and HbCO saturation of 10%~20%. The symptoms are aggravated, the patient's lips are cherry red, there may be nausea, vomiting, confusion, collapse or coma, and the HbCO saturation is 30%~40%. In severe cases, he is in a deep coma with hyperthermia, increased muscle tone in the limbs, and paroxysmal or tonic spasms, with an HbCO saturation of >50%. Patients often have cerebral edema, pulmonary edema, myocardial damage, arrhythmias, and respiratory depression, which can lead to death.

Duan Hui and Qin Hao came to the kitchen and checked that the gas was turned off, and the windows were already open, Duan Hui walked out of the kitchen and looked at the tall man who was being asked. So, is this man turning off the gas and opening the window?

"Wait, what is this?"