"Jiangbei, wait a minute!" Du Chenghu interrupted Lin Jiangbei's words and asked, "Since the recipe of the Black Recipe is from the Japanese aristocracy and is impossible for even Japanese civilians to come into contact with, how can you be so familiar with the Black Recipe fragrance?" Where did you come across this incense? ”

Zhou Fengshan's eyes also stared at Lin Jiangbei without blinking, waiting for him to give an answer.

Lin Jiangbei actually came into contact with Black Cube, a top-notch incense, from the sachet carried by the Japanese tourist when he was dealing with a case of accidental death of a Japanese tourist in Tianzhong Province in his previous life.

But of course he couldn't say the answer.

"When I was studying crime investigation with Mr. Yamada, Mr. Yamada once gave me a black cube sachet, so I was very familiar with the scent of the black cube perfume." Lin Jiangbei replied with the answer that had been prepared in his heart.

Anyway, Yamada Ichimaka has returned to China, Du Chenghu and Zhou Fengshan can't chase them to Japan to ask Yamada Ichimaka for verification, plus the Yamada family itself belongs to the Japanese aristocracy, so Lin Jiangbei naturally pulled Yamada Ichirataka out to be the backbiter.

Sure enough, Du Chenghu and Zhou Fengshan met a look, and they both nodded.

During the more than three years that Yamada Iktaka served as an instructor at the Zhejiang Police Academy, they heard Yamada Kazutaka boast about the glorious history of the Yamada family, saying that the Yamada family was not only noble, but also the most respected knife tester since the Edo period, and even if the shogun asked them to try the sword, they needed to pay a huge honorarium.

Since Yamada is a member of the Yamada family and has served as the director of the Tokyo Metropolitan Police Department in Japan, it is not surprising that he can get a top-level incense like Black Cube. And Lin Jiangbei and Yamada Kazutaka admired the most students, thinking that he was a rare criminal investigation genius in a hundred years, so it was completely logical for Yamada Ichitaka to give Lin Jiangbei a black square sachet......

"Just by virtue of the smell of black recipe on Wang Longfei's body, you judge that he is a Japanese spy, it seems that the evidence is not sufficient, right?" Du Chenghu raised the next question in his heart.

"Inspector General, I just said that. The Black Recipe Fragrance was just the first suspicion I found in Wang Longfei. Lin Jiangbei said, "And then when Wang Longfei introduced himself to me and handed me the business card with both hands, I quickly discovered the second suspicion in him." ”

"What's the second suspicion?" Du Chenghu asked.

"That's Wang Longfei's palm." Lin Jiangbei said, "When I was taking the business card, I paid special attention to Wang Longfei's hands, and then found that Wang Longfei's right palm was the same as a normal person, but his left palm had a thick layer of yellow calluses under the middle finger, ring finger and little finger. ”

"Yellow calluses?"

Du Chenghu and Zhou Fengshan glanced at each other again, obviously, neither of them could understand what was suspicious about the yellow calluses under the middle finger, ring finger and little finger of Wang Longfei's left palm.

"Principal Zhou, Inspector General, you should know that there is a popular technique in Japan called Japanese kendo," Lin Yuanfang said as he reached out and picked up a broom in the corner of the office and compared it to Zhou Fengshan and Du Chenghu.

"Japanese kendo is the right hand in front and the left hand in the back, and the main blow is based on the left hand, so the friction on the lower part of the middle finger, ring finger and little finger is the most at the place where the palm of the left hand touches the hilt, that is, the lower part of the middle finger, ring finger and little finger, and over time, these three parts will leave a thick layer of calluses."

"On the contrary, since the right hand is only responsible for direction and does not use brute force, all those who practice Japanese kendo will not leave any traces on the palm of their right hand."

"You mean to say that Wang Longfei practiced Japanese kendo?" Du Chenghu said.

"Based on the thickness of the calluses on his hands, he has not only practiced, but must have practiced regularly to leave such thick calluses." Lin Jiangbei nodded and said.

"Wouldn't it be too far-fetched to tell that he must have practiced Japanese kendo just by the calluses on his left hand?" Du Chenghu pondered for a while and said, "Do you find any other suspicions?" ”

"Well, there is!" Lin Jiangbei nodded and said, "The third suspicion is that when Wang Longfei gave me a cigarette, I deliberately observed his wrist again, and found that his left wrist was obviously thicker than his right wrist. And when Wang Longfei lit a cigarette for me, he used his right hand to hit the lighter, which obviously shows that his dominant hand is right-handed, not left-handed. ”

"In addition, when I was waiting for Captain Wang to pick up people at the Hubin Branch, I asked Zuo Shunhe to take out the household registration information on Nanshan Road under the pretext of checking Hou Changbin's comrades, and secretly checked Wang Longfei's household card and mouth card."

"Then I found that there was no photo of Wang Longfei on the photo column of the mouth card, and the characteristics of Wang Longfei in the feature column were the hooked nose and a shallow scar under the left eye."

This further validates my inference that Wang Longfei's dominant hand is right-handed, not left-handed. Because according to the relevant regulations of household registration management, if the registrant does not leave a photo on the registration card, in addition to registering the fingerprints of the left and right hands, the characteristics column must indicate whether the registrant is left-handed. Since the characteristics column does not indicate that Wang Longfei is left-handed, it means that he is right-handed. ”

"And in the case of the right hand, the left wrist is thicker than the right hand, what kind of characteristic can be found in the type of person?" Lin Jiangbei continued, "The answer is a Japanese kendo master, and at least a Japanese kendo master who has been immersed in Japanese kendo for more than 20 years. ”

"For example, Mr. Yamada Kazutaka has the obvious characteristic that his left wrist is thicker than his right wrist, and he is a Japanese kendo master with a history of 35 years of Japanese kendo training."

"Now Wang Longfei's wrist has the same characteristics as Mr. Yamada Kazutaka, and the corresponding part of his left hand has thick calluses, coupled with the smell of the top black house perfume on his body that only Japanese nobles can touch, maybe only he is a master who has practiced Japanese kendo for more than 20 years can explain it, right?"

Du Chenghu and Zhou Fengshan glanced at each other, nodded, and agreed with Lin Jiangbei's judgment.

One suspicion is a coincidence, and two suspicions can also be said to be coincidences, but when a third suspicion appears, it cannot be explained by coincidence.

"According to Wang Longfei's mouth card, Wang Longfei's date of birth is March 2 years before the Republic of China, and he is 27 years old this year." Lin Jiangbei said, "In other words, Wang Longfei has to start practicing Japanese kendo at least at the age of seven, so that the typical characteristics of a kendo master with a left wrist thicker than his right hand will appear." ”

"As far as I know, until now, there were no teaching venues for Japanese kendo in our country, and if you go back to 20 years ago, it would be even more impossible to learn Japanese kendo in China!"

In addition, the card shows that Wang Longfei's education level is junior high school, that is, he has no experience of studying in Japan at all. So where did he learn his Japanese kendo? ”