Gao Cheng goes into No. 8 car and passes through No. 8 car after finding nothing wrong. He soon sees several crew members waiting anxiously at the door of the crew room.

"What happened?" Gao Cheng asked, "a steward was looking for a doctor just now..."

"Are you a doctor?" Several flight attendants looked suspiciously at Gao Cheng. Although they were dressed in suits and were a little mature, they looked like high school students.

Gao Cheng explained: "I'm not a doctor, but I have more research on autopsy. I'm a detective."

"Ah A young steward exclaimed, "are you the famous detective in Tokyo?"

The others didn't respond: "detective Chenghu? Which city detective? "

"Detective, detective!" Young steward reminds a, knock on the door in a hurry to shout a way, "Mr. arrow wood!"

When the door of the steward's room opened, the conductor panicked: "what's the matter? Keep your voice down. Don't let the other passengers know. "

Then he looked at Gao Cheng in doubt: "is this the doctor?"

Gao Cheng smiles and walks into the cabin. At a glance, he sees a middle-aged uncle lying in the corner with no blood on his lips.

"He is a famous detective in Tokyo. He can do autopsy," the attendant explained in a low voice

"Oh, oh." The conductor closed the door and was afraid to stand behind Gao Cheng. "He's a passenger in car 8. He doesn't seem to be breathing..."

Gao Cheng has checked the condition of the corpse. It looks like sudden death caused by heart disease. The time of death should be within half an hour.

But it seems that his ability is not enough in the specific situation. Intuitively, this person is definitely not a simple sudden death

"The conductor continued:" our steward found something wrong, afraid of causing passengers panic, brought him here

"Mr. Yamaki!"

The steward who had been looking for a doctor came back here and reported to the conductor: "no, there is no doctor on the train..."

"If you want to find a doctor," Gao Cheng looked back, "the middle-aged man in a suit sitting in the front row of car 7 on the right side of the aisle should be a doctor. He just sat in front of me."

"Ah The steward recognized Gao Cheng and said, "how can you be here? Really... "

"Detective, he's a detective," the conductor urged. "Well, bring the doctor quickly."

"Yes

The steward went to car 7, and the steward's room closed again. The conductor stood on the side with a headache to see Gao Cheng find his wallet in his uncle's pocket.

"Does he have company?" Gao Cheng asked.

"I don't think so." The conductor shook his head

"Well..."

Gao Cheng finds a middle-aged uncle's business card. He's with him. He's also the president of a Tokyo detective agency. It looks like he's on a business trip.

Private detective is really dangerous. I don't know if this uncle was killed because of the investigation. If it is true, he will be in trouble.

With so many people on the train, it's very difficult to find the killer

Put the wallet aside and Gao Cheng continued to search.

A small medicine bottle, eye drops cover, empty tape cassette, empty glasses case, cigarette filter

A lot of things are only half, and the most important mobile phone is not there. As a private detective, his mobile phone is basically inseparable.

"Any other luggage?"

"No more."

"No?" Gao Cheng browed.

It's very likely that he killed him, so I knew there would be no case of accidental death

On the other side of car 7, the steward followed Gao Cheng's advice to find Nakagawa, who was still reading a magazine.

"I'm sorry," the steward whispered as he walked up to Nakagawa. "Would you please come here?"

"Eh?" Nakagawa hands a tight, frown at the crew.

"Please."

"What for?"

The steward looked around and said, "a passenger suddenly got sick, so..."

Nakagawa was stunned and said strangely, "why did you come to me?"

"Are you a doctor? Please

The stewardess bowed sincerely, but Nakagawa was not in the mood to care about anything else. His face was terrible, and his strong sense of uneasiness even made him gasp.

Full of doubts, Nakagawa puts on his coat and follows the steward to the cabin.

At this meeting, Gao Chenggang received a call from Dr. a Li, nodded toward Nakagawa and gave up the cabin.

"Chenghu," Dr. Ali worried, "Xinyi can't help getting involved in another case."

Gao Cheng said helplessly, "I'm in trouble here too. Don't worry. No matter what, he knows how to be proper."

In the cabin, Nakagawa learned Gao Cheng's identity from the conductor. After examining the body nervously, he still couldn't help asking, "detective Chenghu, why do you know I'm a doctor?"

Gao Cheng hung up, did not respond, but asked: "do you know the cause of death?"“ Maybe it's myocardial infarction, "Nakagawa opened his mouth, pressed the doubt for a while, pointed to the small medicine bottle and said," this bottle of nicotine is the medicine for treating heart disease. It seems that he has no painful expression. The onset of the disease should be a moment, and there is no time to take the medicine... "" he deserves to be an official doctor. " Gao Cheng blinked his eyes and continued to ask, "in medicine, is it possible to kill people in the way of myocardial infarction? For example, how can we fail to find out at the time of autopsy through drugs? "“ Why Nakagawa's eyes narrowed slightly, staring at Gao Cheng, and explained, "it's not impossible. If there are substances in the human body, it can't be detected. It's like potassium chloride. If it's injected in a large dose, about 20cc will be fatal... However, detective Chenghu, do you suspect that this person has been injected with drugs?" Gao Cheng's eyes fell on Nakagawa's coat and pointed to his uncle's belongings: "there is a glasses box but no glasses, a filter but no cigarettes, a camera but no film, a lid with eyedrops but no eyedrops, a tape box but no tape and player... Isn't it strange?" Nakagawa looked at the relic and said with a smile, "what's so strange? Maybe it's in the luggage... "" there's nothing in the luggage, and there's only half of the things left, which means there's a pocket... Someone took his coat away. "Gao Cheng casually reached for Nakagawa's coat," just like this one, The victim put the things he used in his coat pocket... "Nakagawa chuckles and avoids Gao Cheng:" why do you care so much about a coat? Maybe it's lost somewhere. " Gao Cheng forced to check his coat, but he didn't say anything more with a smile. Although it was only a short time ago, he almost knew that Nakagawa was the murderer. Sure enough, there were cases like this. Not every criminal committed a crime so skillfully, and the killing method was like performing magic. However, compared with knowing who the killer is, it seems that it is not easy to prove that this person is the killer. It's a strange case.