Ni Jun's words suddenly took a turn, but they stopped again. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

"But what, did you find something?" asked Wang Yiyuan eagerly, causing the two people present to look at her in surprise.

"Well, I'm just a little curious, so go on. Wang Yiyuan also noticed her gaffe, adjusted her breathing, picked up the cup in front of her and pretended to take a sip of coffee calmly, but she was unexpectedly choked and coughed again and again.

Ni Jun's brows furrowed imperceptibly, but he didn't ask much, just lowered his gaze, and continued to describe while recalling the situation he had examined at that time:

"The glass residue at the scene has been cleaned up, the blood stains on the ground have also been washed, and the smell of detergent can be smelled. But in addition to the smell of the detergent, I also smelled a smell that wasn't supposed to be there, it felt like acetone. ”

Looking up and seeing Wang Yiyuan's inexplicable gaze, Ni Jun had no choice but to continue to explain patiently: "Acetone is a chemical substance, which is a colorless and transparent liquid when dissolved in water, with a special pungent smell, and is often used in manufacturing industries such as explosives, plastics, and rubber. Acetone solvent is highly volatile, and after being inhaled, it will have an anesthetic effect on the central nervous system, so it is often used as a raw material for making drugs by criminals. ”

Is it related to drug abuse and drug trafficking? Wang Yiyuan was shocked again. She knows that drug dealers are ruthless, and she has always hated drug abuse and drug trafficking.

Hang Ping's focus is completely different: "Ah, do you smell that smell? So are you okay now, are you uncomfortable? Or let's go to the hospital now." ”

Ni Jun patted Hang Ping's hand and smiled slightly: "Don't worry, I'm fine." Didn't I just say that acetone is very volatile, and when I went there, I could only smell a little residual smell, so that it would not have any adverse effects on the body, but I was a little curious about the appearance of chemicals that were suspected of being acetone there. ”

"Hmph, there must be something wrong with that bar, maybe it's involved in the drug deal in private. You should call the police and let the police take a good look. Wang Yiyuan snorted coldly.

"Probably not. When acetone is used as a raw material to make drugs, it does not emit such a strong odor in the air. And because the volatile gas of acetone is not only toxic itself, but also forms an explosive mixture in contact with air, and it is easy to produce combustion and explosion in case of open flame and high heat, so it has long been included in the list of hazardous chemicals in China, which is a controlled item, and not just anyone can easily buy it. ”

Ni Jun paused again, recalled for a while, and continued: "I followed the smell and found that the closer I got to the back door of the bar, the stronger the smell became, and finally I could basically determine that the smell of acetone came from the stairs of the back door of the bar. ”

When Hang Ping heard this, Ni Junming knew that the gas after the volatilization of acetone was toxic, and he followed the smell, and his heart was tight, and he couldn't help but reach out and hold Ni Jun's hand, his expression was full of concern.

Ni Jun held Hang Ping's hand, tightened it slightly, signaled that he was fine, and then continued: "I thought it was strange at the time, so I carefully inspected the surface of the staircase, and found that there was a thin layer of gray-white substance left on it. I scraped it off with a knife and wrapped it in a napkin, and the next day I asked my colleague to help identify it, and the result of the identification was that the gray-white substance was mainly composed of synthetic resin, pigments and some chemical additives, which could basically be judged to be the sole of a sneaker.

"Thinking of the loss of a shoe on Jian Yisheng's foot when I saw her in the hospital at that time, I speculated that it should have been lost when she walked out the back door of the bar. At the same time, when my colleague tested it, he also found that in addition to the normal components of the soles of the sneakers, the substance actually contained C5H5NO2, that is, cyanoacrylates, which is a bit strange. ”

Wang Yiyuan rolled her eyes: "Please, please speak Chinese!"

Although Ni Jun, who usually speaks very little, has used a lot of language to speak, some chemical terms are really no concept for liberal arts students like Wang Yiyuan, which is tantamount to listening to a book from heaven.

Ni Jun didn't mind Wang Yiyuan's interruption, but he didn't seem to be able to find a more suitable way to express it, so he just continued to explain patiently: "The cyanoacrylate I just mentioned is an acrylic resin, which reacts quickly and solidifies once it is combined with hydroxide ions, and can be bonded almost instantaneously, and is the main ingredient of industrial adhesives, which is commonly known as super glue. ”

"Then what do you mean by 'strange' just now?" Wang Yiyuan still didn't understand. Since the soles of the shoes were glued to the steps, it didn't seem strange that there must have been something strong glue on the steps.

"Don't you think it's strange?" Ni Jun looked at Wang Yiyuan with the expression of a scholar looking at a scumbag.

Wang Yiyuan snorted in her nose, supported her chin with one hand, and glared back at Ni Jun so defiantly that Hang Ping couldn't help laughing.

Ni Jun first lowered his head and smiled secretly, before raising his head: "Okay, it's me who didn't explain it clearly." As I mentioned earlier, cyanoacrylates bond almost instantaneously when combined with hydroxide ions. That is, after it is exposed to air, it quickly solidifies and loses its viscosity. But according to the person who took Jian Yisheng to the hospital at the bar, Jian Yisheng went out to throw garbage alone, and almost no one passed through that small alley, so how did the soles of her shoes get glued to the stairs?

"That may be ......" Wang Yiyuan originally wanted to refute that it might be that the sneaker manufacturer used super glue when gluing the soles, so the super glue component was detected, but after thinking about it, since what was found was only a thin layer of the sole, it should have nothing to do with the adhesive used in the sneakers themselves, so they swallowed the rest of the words into their stomachs.

"Then what do you mean?" Facing Ni Jun, a scholar, Wang Yiyuan felt a sense of powerlessness as a chemistry scumbag, so she simply gave up using her head and asked directly.

This time, Ni Jun pondered for a longer time before finally speaking: "I don't dare to judge, but from what I know so far, if it wasn't for Jian Yisheng herself, it was someone else who was with her at the back door at the time, and smeared super glue on the ground in a very short time before she went out, causing her shoes to be glued to the ground." This would also explain why I smell acetone. ”

"Why?" the two women asked stupidly, in unison.

"Because of super glue!" Ni Jun pushed the glasses on the bridge of his nose, stared at Hang Ping and Wang Yiyuan back and forth with wide eyes, as if surprised by their ignorance, and then added: "In industry, acetone is an important raw material for organic synthesis, and it is also used as a diluent and cleaning agent, which can neutralize the reaction of cyanoacrylate and play a role in removing super glue." ”

Listening to Ni Jun say this explanation lightly in a tone of "everyone on earth should know", the two women present suddenly had completely different reactions.

Hang Ping smiled sweetly, looking at her boyfriend with stars flashing in her eyes, and she could almost see the words "My man is the best" on his face.

And Wang Yiyuan helplessly held her forehead, lamenting her fate of being despised by the school bully again: Why should I ask so well? I don't know how to pretend to understand, I have to ask, but in the end I am humiliating.

Wang Yiyuan made up her mind to shut up and be dumb, and stopped talking, but Ni Jun didn't give her this opportunity, looked at her and asked, "Why do you ask this?"

Nonsense! I must have asked because I didn't know, do I have to admit that I am ignorant? Wang Yiyuan's heart suddenly 10,000 divine beasts galloped happily.

"I'll admit I don't know anything about the chemicals you talked about. Is it interesting that you, a science student, come to show me the superiority of chemistry knowledge with a liberal arts student?"

"What?" Ni Jun looked dazed.

"It's nothing, I mean, I have a strong desire to learn, and I have a serious and responsible attitude towards science, and since I don't understand, I naturally ask questions. ”

Ni Jun realized that Wang Yiyuan had misunderstood that he was asking her why she was asking "why", and smiled a little helplessly, then restrained his smile, and after taking a deep breath, he said seriously: "I didn't mean that." I wonder why you're asking me if the police are investigating the cause of Jian Yisheng's death?"

"Didn't I just say that? I'm just curious. And you know that I'm unlucky, and knowing a little bit more about other people's accidents also helps me avoid making mistakes and dying, right? Wang Yiyuan's eyes flickered, and she moved out of her previous rhetoric.

However, Ni Jun did not stop there, his eyes looked at Wang Yiyuan through the lenses of his glasses, and asked again: "Then after I told you that because Jian Yisheng has been determined to have died in an accident, the police did not intervene in the investigation, why did you ask me what I thought just now?"

“……”

"Also, when I mentioned the word 'but,' you reacted eagerly and asked me if I had found anything. You asked this if you knew I was going to find something, right?" Ni Jun's tone became more and more serious.

Wang Yiyuan was speechless for a while.

In her mind, there was a very dark speculation, but she was unwilling to accept that there was a possibility that that the speculation could become a reality, so she didn't want to say it. I'm already very unlucky, in case I have a crow's mouth, and I become a prophecy, then ...... She couldn't imagine it.

Unable to find a suitable excuse to respond to Ni Jun's question, Wang Yiyuan simply kept silent, just picked up the coffee cup and looked at the coffee inside.

Ni Jun stared at Wang Yiyuan, and Wang Yiyuan stared at the coffee cup, several people fell silent, and the scene suddenly became a little embarrassing.

Hang Ping looked up at Wang Yiyuan opposite, then turned his head to look at Ni Jun beside him, then looked up at Wang Yiyuan, and hesitated to speak: "This, are you hungry?" Why don't we find a place to have dinner first." ”

Wang Yiyuan didn't react, and Ni Jun didn't move.

After a long while, Ni Juncai sighed, and instead of calling Wang Yiyuan's nickname "Quanquan" as usual, he called out her name very seriously: "Yiyuan, I don't know exactly what happened, but my intuition tells me that you may know something that I don't know." ”

Wang Yiyuan did not react.

"You are Hang Ping's friend, and you are also my friend, and there is no need to hide too much between friends. ”

Wang Yiyuan still didn't react.

"You should know that Jian Yisheng is also my friend, and the fate of her and her sister is really too unfortunate, if her death is really anything suspicious, I will definitely help her get justice. ”

Wang Yiyuan's eyes moved, opened her mouth, but still didn't speak, just brought the coffee cup in her hand to her lips and took a shallow sip.

Ni Jun lowered his gaze and whispered, "I don't know why you refuse to tell the truth. Maybe you have your own troubles, but if you can, I hope you can help me and help Jian Xingyun. Jian Yisheng is really a good girl, fate shouldn't be so unfair to her. ”

Hearing this, Wang Yiyuan's expression finally changed a little.

Putting down the coffee cup in her hand, Wang Yiyuan seemed to have made up her mind, looked up at Ni Jun, and asked very seriously, "Do you believe me?"

Ni Jun met Wang Yiyuan's gaze, did not hesitate, and nodded heavily.

Without the slightest hesitation to Ni Jun, Wang Yiyuan squeezed out a smile full of comfort, and then said, "Just trust me." No matter what happened to Jian Yisheng, I swear that what happened to her had absolutely nothing to do with me. ”

"I know. As I mentioned earlier, super glue has the property of curing very quickly. When Jian Yisheng has an accident, you should be working in the studio, and you can quickly determine this situation by asking the people in the store next to the studio, if you are not there, you can't hide it if you want to, so you will definitely not appear at the scene of Jian Yisheng's incident. ”

"Hehe, it seems that you still have doubts about me, and it is only because I have an alibi that you have dispelled your suspicions about me, right?" Wang Yiyuan laughed self-deprecatingly, "It's okay, I didn't speak clearly, and it's normal for you to be suspicious." As long as you're willing to trust me now. ”

Ni Jun didn't answer, waiting for Wang Yiyuan's next words.

After hesitating for a while, Wang Yiyuan finally spoke:

"I have a guess, but right now my mind is a bit chaotic and I need time to sort it out. I'll tell you when I figure it out. She smiled again with a pretended lightheartedness, "It's time for dinner, you two go find a place to eat, I want to be alone." ”

Hang Ping was about to open his mouth to invite Wang Yiyuan to eat together, but was stopped by Ni Jun by shaking his hand tightly.

He took Hang Ping's hand and stood up, looked at Wang Yiyuan and said, "Okay, I believe in you, I hope you can tell me as soon as you figure it out." Then he took Hang Ping and left.