What does it mean to get a perfect score on the college entrance exam but then go missing?

With the arrival of cold air, the temperature in Xi'an has finally dropped to a comfortable range.

this day.

Xijing Municipal Bureau.

Chen Xianghui, from the Criminal Investigation Team One, walked into the captain's office carrying a folder.

"Captain, the cyber police have transferred a case to us. I think it's necessary to open a case and investigate it."

Team leader Yu Qiang looked up, a hint of irritation creeping into his eyes.

The current public security situation seems to be very good, and the country is peaceful and prosperous.

But only they, the criminal police officers, knew that the crime rate had increased significantly compared to before.

There is no such thing as a peaceful and tranquil life; it's just that someone is silently protecting you.

Especially during this period.

The criminal investigation team has a backlog of serious cases and is already short-handed.

At this point, the cyber police stepped in and made things worse.

No matter how big a case is online, it can't compare to a real-world case.

Yu Qiang sighed softly, "Have you finished the documents for that fraud case you have? If you have, take some people to check it out, and then see if it's appropriate to file a case."

Chen Xianghui did not respond immediately, but said tactfully, "I'm afraid I don't have that ability."

"What kind of talk is that? You're a criminal investigation officer, not an auxiliary police officer. How could you not be capable enough?"

Chen Xianghui handed over the case file directly: "Captain, why don't you take a look at the clues from the cyber police first?"

"I'm really fed up. You guys are so sloppy and unreliable when it comes to getting things done..."

Yu Qiang opened the case file while complaining.

"The suspect purchased 500 kilograms of polyethylene glycol from 1688... What is polyethylene glycol?"

Chen Xianghui had clearly done his research, and immediately explained, "This is a transparent, viscous liquid that is often used in cosmetics and pharmaceuticals, mainly for moisturizing and solubilizing purposes."

Yu Qiang pouted after hearing this: "Not even a hazardous chemical?"

No, it's not regulated.

Yu Qiang: "Are those cyber police just bored and have nothing better to do?"

I'm truly impressed.

There's nothing wrong with consumers buying chemicals.

Anyway, it's not a dangerous chemical.

Even if there's a problem, just hand it over to the police station to investigate. What's the point of handing it over to the criminal investigation team?

"Captain, please continue reading," Chen Xianghui said with a grim expression.

Yu Qiang impatiently flipped through the case file again.

"The suspect searched the area the following day and purchased polyisocyanates... What are polyisocyanates?"

Chen Xianghui: "This is a chemical raw material, which is generally used in things like foam and coatings, but it can react with the polyethylene glycol I just mentioned."

Yu Qiang: "What was the reaction?"

"Combining the two can produce polyurethane elastomers, similar to hydrogels and adhesives."

Yu Qiang became more cautious: "Is it a hazardous chemical?"

"No, polyisocyanates are slightly toxic and can damage the respiratory tract if inhaled."

Yu Qiang was confused: "In that case, it's not a big deal. They might be rubbing some kind of chemical raw material by hand."

Is it strange to buy these chemicals online?

strangeness.

But is it illegal?

Do not commit this offense.

No matter what they're doing, as long as they purchase non-hazardous chemical raw materials from legitimate channels, there's nothing wrong with it.

"What are the reasons the cyber police want to file a case?"

Chen Xianghui took the case file directly and highlighted the key points: "In the following three days, the suspect also purchased chemical raw materials such as cellulose acetate butyrate, high-energy plasticizer, ammonium perchlorate, aluminum powder, 2-nitrodiphenylamine, triphenylbismuth TPB, ferric oxide, and chromium oxide."

"The total weight of the orders, both before and after, reached a staggering three and a half tons."

"Based on these orders, the cyber police believe the suspect has a serious problem..."

Before he could finish speaking...

"There is definitely a problem!"

Yu Qiang frowned.

If you say you're buying three kinds of chemicals, I'll assume you're up to something behind the scenes.

However, they bought more than a dozen kinds at once, and the quantity reached three and a half tons.

This is a big problem.

"These things shouldn't involve drugs, right?"

Chen Xianghui shook his head: "That doesn't exist, it's irrelevant."

"Are those all considered hazardous chemicals?"

Chen Xianghui: "Apart from a few types that have some slight usage restrictions, they are generally not considered hazardous chemicals."

"That's strange..."

Yu Qiang kept flipping through the case files, feeling something was very strange.

Purchasing so many chemicals in a short period of time is definitely not something an ordinary person can do.

But you need to state your purpose.

Given Yu Qiang and Chen Xianghui's level of knowledge, they couldn't analyze anything at all.

"The cyber police's intuition was correct."

There's something going on here.

"But we still need to figure out the specifics of what these chemicals are for."

"How about this, have someone bring the suspect over first, and we'll question him then."

No matter what.

The person who buys these things must be acting against their conscience.

Although we cannot directly arrest and detain him, we can question him.

If the suspect resists or conceals information during the process, the criminal police can apply for an arrest.

Upon hearing this, Chen Xianghui shook his head vigorously, saying, "No, I can't take any, Captain."

"What's wrong?"

Chen Xianghui looked worried: "The suspect is 79 years old, an old lady, paralyzed on one side, and can't speak a word fluently."

"Don't even mention calling them over for questioning."

"I'm afraid that if we go to her door, we'll scare her into something bad."

Yu Qiang: "This..."

At seventy-nine years old, one is already at an age where one can no longer be chosen.

Don't tell me that they haven't broken the law yet.

Even if it's illegal, it's difficult to deal with.

Bringing them in for questioning, it would be a real problem if they suddenly died in the criminal investigation team.

But the words came back again.

A 79-year-old woman with hemiplegia certainly couldn't afford to buy so many chemicals.

"Send someone to investigate the old lady's network of connections and find out who is using her account."

Chen Xianghui nodded immediately and then assigned the task in the work group.

Yu Qiang twirled his ballpoint pen, becoming serious.

"Besides finding the person."

"The most urgent task is to figure out what these chemical raw materials can be used for."

Did you consult with the specialists in the laboratory?

Neither Yu Qiang nor Chen Xianghui have a science background.

But the criminal investigation team does have experts; they should know something about these chemicals.

"I asked."

Chen Xianghui looked somewhat discouraged.

"The lab technicians are also clueless."

Yu Qiang: "How could that be? I remember there were several graduate students there."

"Yes, one of them is a chemistry major."

Chen Xianghui explained.

He said these chemicals can be combined in twos and threes.

"But the compounds that are combined are nothing special; they are all common industrial products."

"And he said!"

"They can be combined in twos and threes, but when all of them are put together, they cannot be combined."

Yu Qiang: "Does that mean there's no visible connection between these chemicals when they're combined?"

"Yeah, I see." Chen Xianghui nodded. "Anyway, he said that with his education level, he wouldn't be able to understand it, and suggested that we seek expert advice."