"What do you think, Dalong?" Wang Yijun asked with a smile.

"Let's let Xiao Ai hurry up and find a rope, compare, compare-let's talk?!" After Dr. Chen finished speaking, he looked at the big man.

"Okay! Teacher--just go-" Chunguang Fox said suspiciously "Doctor", and walked into the corridor in a few steps to find Pig Hate Nian...

Ai Chunguang went and returned, took a few ropes to meet the teacher of the city bureau, and saw Niu Da, Li Suo, Inspector Cheng and Tu Organizer - gathered next to Wang Yijun, while looking at the photos - while discussing:

"The last time I went to Master Huang to identify the 'ski shirt' with Yongzi, I thought it was weird to list a hat rope 'pimple'? I just can't say a - so it is! After all, it's not a professional drop?! Li Yaohong sneered.

"Expert Wang is not Xue, which one cares about nagging? Black and black - haven't dropped your fingers yet?! "Tubuping is a Xiangbei official dialect—

Chen Longping, who was standing behind him, had a trace of confusion flashing in his eyes - what did he mean?

"An autopsy at the time, right? Xiao Zhao Yun - is Zhao Decai's forensic doctor, who is very troublesome about a knot, and repeatedly takes pictures; Questioning the 'beautiful forensic doctor' again—"Cheng Yong seems to be back on the night of the autopsy "No. 2"—and sees Rarity as cold as ice, and then asks:

"Big man, what kind of explanation will Forensic Doctor Zhao give you about making a 'knot'?"

Everyone's eyes focused on Ai Chunguang!

"Cheng-Inspector Cheng—" Chunguang blinked quickly: Unexpectedly, Cheng Yong ran to nag himself? How so?

"I remember the site investigation report that said - 'to do an experiment on the knot of the ski jacket hat' and the question mark (?) ）?! I haven't had time to do it, have you? Niu Da looked at the rope in Xiao Ai's hand and said thoughtfully.

"Nope! Teacher Wang asked me to find a rope - just - to do it? Ai Chunguang replied in embarrassment, feeling isolated and helpless:

Inspector Zhao is not there? Boss Wei is not here either?! It's just the past two days that I forgot about it again - what a failure, in front of the master of the city bureau - I lost the face of Detective Tongxi...

"Brigade Niu, I see you just entered the door - discussing things? Let's 'do experiments' in another place, and there are results - and then report to the leadership ?! Chen Longping suddenly spoke:

He was annoyed by a group of unattended, loud, and incomprehensible detectives—who interfered with his train of thought and judgment...

"Okay! Forensic Doctor Chen, let's go to Li's office to discuss the 'No. 3' matter? You'd better stay in Leha-study slowly, and the case is all supported by 'technology'-" Niu Meng paused for a moment, and then continued:

"Inspector Cheng knows all aspects of 'No. 2 Liu Yaping' - he stays to cooperate with you!"

After Niu Da finished speaking, he immediately walked out, and stared at Ai Chunguang by the way: bow his head and blush - there is shame! Shame and then courage - the son can be taught...

Cheng Yong suddenly felt that he was a little too talkative, a little too nagging, so he stepped aside - lit up a telephone pole and acted as a spectator -

Two masters of the city bureau held a rope and looked at the photo - slowly knotted?

Once, twice, three times...

"I think it's a 'surgical knot'! It's the knot that our doctors tie when they stitch up the wound. The general process is: first cross the two ends, wrap two (circles), and then take one end from the outside to the inside to wrap the other end - wrap two, pull the two rope ends tight, and you're done—"Chen Longping said while demonstrating with a rope: finish, knot - tie up!"

"Shall I take a look?" Wang Yijun said:

He put the knot he had tied on the table, and compared it carefully with Forensic Doctor Chen, as well as the "photo"...

"It should be the same! This kind of 'knotting' - what should Forensic Doctor Zhao understand? Chen Longping was a little puzzled:

"Doctors who have performed surgery will do it! This hat knot is not badly tied - it's symmetrical! It is also very strong - this is one of the great features of the 'surgical knot', that is, the knot is tied with a very smooth rope - and it will not fall apart! ”

"Liu Yaping is a tailor, and she usually makes a 'single knot' - to prevent the thread from scattering?! It should not be with this 'dead knot' - it is not easy to untie! Not to mention tying the hat cord together in this way, and tucking it around the hair and around the collar? Wang Gong frowned and said to himself:

"If analyzed in this way, the knot was tied by the 'murderer'..."

"You mean-the murderer was a 'doctor'?!" Cheng Yong couldn't help but shout in a low voice:

He kept staring at the actions of the two masters, just like watching a wonderful magic show, and the climax of the performance was - the moment of "analyzing the knotting method and deriving the murderer's profession"! But none of the 3 key suspects are doctors!! He was shocked - you can imagine it!!

"Be quiet! - Xiao Ai, what do you see? Forensic Doctor Chen asked.

He noticed that Ai Chunguang had been following the comparison beside him, and it seemed that he was not as surprised as Cheng Yong was at the important analysis and clues that were about to come out.

Wang Yijun also looked at Chunguang with confidence - waiting for his "praise-same"!

"Two teachers, I think about it..."Ai Chunguang scratched his head, recalling Xiao Zhaoyun's advice to him—

That night-after Yaping's autopsy, in the courtyard of the mountain house, Zhao Decai told Chunguang: Every detail on the corpse is very important, and some details can reflect the psychological characteristics and daily behavior habits of the perpetrator, and even professional habits. For example, the "hat knot" that appears now is very interesting and worth studying? At first glance, it seems that the professional knotting technique of the "doctor" - to go back to the experiment - confirmed?!

"At that time, time was very tight, and Inspector Zhao didn't explain much. Instead of a sample of the two teachers – a detailed introduction, and a 'mock' demonstration – I learned another 'trick'! Chunguang said: Some excitement - wink?

"I know 'Forensic Doctor Zhao' - I should understand the ground! - Sure enough, it's good. Chen Longping admires Zhao Decai very much: in the past, the two worked very happily together in detective Tongxi County's many difficult murder cases...

"Teacher Wang, I have an idea-" Chunguang saw Wang Gong's eyes full of encouragement and expectation, so he said with confidence:

"Surgical knots - I'm not familiar with them. But I remember when I was a child - chopping firewood from the kiln, using the 'egg feather' branches as a kidneys (rope) - tying firewood, the technique - also a row of drops! And the back two - if the direction is 'around the opposite', it is not tightly tied?! ”

"Ahh

"You bundle it up for me—see? Just - bundle teacups?! Forensic Doctor Chen was curious: Let the big man demonstrate immediately?

Ai Chunguang wrapped a shoelace around the teacup, like a bundle of firewood and grass, and made two knotting methods, "loose and tight"—the operation was completed quickly!

"The one that's tightly tied—that's the 'surgical knot' that is tied to the ground." Wang Yijun affirmed softly.

At this point, the assertion that "the murderer is a doctor" - seems familiar and strange at the same time ...

20 seconds later, Inspector Cheng broke the awkward silence:

"Are the two teachers smoking? - Anyway, make a 'knot', not everyone will beat it - I won't! Columns are valuable for narrowing down the detective spectrum! ”

Wang Yijun shook his head, Chen Longping shook his hands - no smoking? Don't have the mind??

"Inspector Yong, big leader? Oh, let's go down for lunch? Pig hated the year and shouted at the door.

Seeing that the response was not positive, he sneered and said, "Do work - always have to 'eat' drops?!" Detective Ai, how good is the rope? ”

Hearing Master Zhu mention the "rope", Chunguang hurriedly agreed:

"Use it well! I'll give it to you-"

He said as he untied the knots - it was a lot of work?!

"I'll take it down - solve! Column of 'dead man's buckle' - tight nagging, difficult to understand. If you tie up 'paper shells' and 'snakeskin bags', what will happen - it will be good and will not loose! Pig Hate Nian approached and glanced at the knot.

"......" Forensic Doctor Chen and Wang Yijun looked at each other:

I didn't think of the "surgical knot" – there are still these uses!?