Travel through famine years and awaken a post-apocalyptic survival system.

……

After checking for a while, I looked at the records above.

After thinking for a moment, she asked, "Shen Wanqing, does the infirmary use a lot of potassium permanganate? I see it's used quite a bit every week, and... the timing is very fixed. What's going on?"

Shen Wanqing leaned over to take a look.

His face showed confusion.

As Zhao Qingsong watched the other person's profile approach him, a distinctive shampoo scent from that era wafted towards him.

It made him feel itchy inside.

……

"this……"

Lost in thought, Shen Wanqing looked up to speak.

But when she saw Zhao Qingsong staring at her profile, she blushed instantly.

At the same time, there was a hint of embarrassment and annoyance.

"cough!"

Zhao Qingsong saw the woman's gaze and knew that she thought he was a lecher.

He cleared his throat lightly and asked seriously, "Is there a problem?"

Seeing his expression, Shen Wanqing felt a little better, and then said, "Oh, I know, but... this concerns the patient, so it's not convenient to talk to you about it."

Upon hearing this, Zhao Qingsong frowned.

"Why? It needs to be used every week. From what you're saying, is it for a specific person? And it's not convenient to say?"

Shen Wanqing blushed slightly: "Mmm!"

Judging from her expression, Zhao Qingsong guessed it was related to a gynecological problem and turned his gaze to Gao Dazhi.

"Brother Gao! What... what should we do?"

Seeing this, Gao Dazhi asked in confusion, "What's going on?"

Zhao Qingsong hesitated for a moment, wondering how to explain to him that the reaction between potassium permanganate and alcohol, glycerin, sugar, and the like could produce an explosion!

A headache!

After thinking for a moment, he said, "I'm just curious. A few days ago, when I took my father to the hospital, I heard someone say that potassium permanganate can explode when it comes into contact with ethanol or something. I don't know what ethanol is. So I'm asking."

Shen Wanqing was surprised: "Ethanol, that's alcohol! It really can explode?"

Zhao Qingsong shook his head: "I don't know the specifics either. I just heard it from someone at the hospital. They said there should be college graduates in our factory. We could ask them!"

Most college graduates of this era did not enter the government system, but rather large industrial and mining enterprises.

In particular, science and engineering students almost never stay in the system.

Shen Wanqing thought for a moment and said, "Okay, I'll call and ask. Someone at the research institute must know."

After saying that, he picked up the phone on the table and made a call.

……

"Hello, this is Uncle Wang, it's me, Wanqing!"

"Um, I'd like to ask you something..."

"Oh, okay, thank you!"

After a while, she hung up the phone and then looked at the two of them: "It really is! It really will explode, but he said that the power of the explosion is not very strong."

Zhao Qingsong seemed to be deep in thought upon hearing this.

He then asked, "What do you mean by 'not very powerful'? Also, what about high-temperature, high-pressure equipment like a blast furnace? Wouldn't that cause significant damage?"

His words caused Shen Wanqing's expression to change.

I quickly made another call.

Finally, after hanging up the phone, he said, "That is indeed a possibility. If the blast furnace is disturbed by something like this, it could very likely cause serious consequences, even a major explosion."

Zhao Qingsong laughed upon hearing this, "Don't be nervous. I'm just asking casually, it's just a guess, so I need to know where these things are."

Shen Wanqing hesitated for a moment.

Looking at her expression, Gao Dazhi became somewhat serious.

"Shen Wanqing, we are investigating a case. There are some things that need to be clarified, and any potential problems must be eliminated. Please tell us what happened?"

Shen Wanqing hesitated for a moment.

He glanced around at the two people.

It's as if they're confirming who they're telling!

Finally, Shen Wanqing blushed and waved to Zhao Qingsong.

Having understood what she meant, Zhao Qingsong put his ear close to hers.

Shen Wanqing whispered something in his ear, then quickly withdrew.

Zhao Qingsong suddenly realized.

"Oh, I see!"

Gao Dazhi asked, puzzled, "What's wrong? Is there some secret?"

Zhao Qingsong smiled and said, "Brother Gao, I'll tell you when we get back."

This is an era where talking about sex is shameful. Even when it comes to women's periods, many unmarried young men don't understand. They only realize this after marriage. Gynecological diseases are a major taboo for women.

He then asked, "Who received the most of this stuff?"

"Xu Jing, Xu Qiang's sister, also works in your security department. She needs this for her bath, so she comes over every week to get a little bit, not a large amount."

Upon hearing this name...

Zhao Qingsong was taken aback.

Oh shit.

Is it really such a coincidence?

To be honest, he hadn't really considered the feasibility of using potassium permanganate to make explosives; he just felt that if there were any potential risks, they needed to be eliminated.

I never expected to find this clue.

Gao Dazhi and the other man exchanged a glance, a strange look flashing in their eyes.

One coincidence, two coincidences.

Repeated coincidences are no longer coincidences and inevitably arouse their suspicion.

Zhao Qingsong didn't say anything and continued the investigation!

……

The matter was over, and the warehouse door was locked.

The three left and found Director Chen.

"Qingsong, please wait here for a moment. I'll go in and talk to Director Chen about something."

After saying that, he pushed the door open and went inside.

The door was not completely closed; it was half-open.

Zhao Qingsong stood at the door, looking at Shen Wanqing who seemed a little awkward beside him, and felt that the girl was somewhat uneasy.

He then asked with a smile, "Are you a nurse here?"

Shen Wanqing stood at the door, unsure whether to leave, feeling somewhat awkward.

Hearing his voice, she looked up and gave a soft "hmm": "Yeah! I wouldn't call myself a nurse! I graduated from a steel technology school and was assigned here. I do all sorts of jobs, and I'm also learning to be a nurse."

"Oh, you didn't graduate with a nursing degree!"

Zhao Qingsong suddenly realized.

His words sounded mocking, making Shen Wanqing feel somewhat uncomfortable.

"I did not graduate as a professional nurse, but I have been studying very hard."

Zhao Qingsong was stunned for a moment when he saw the other person's expression.

Seriously? You're so petty, you get angry so easily?

"Oh! I was just saying!"

Lost in thought, I heard footsteps coming from inside the house, and soon I saw Gao Dazhi come out.

"Qingsong, let's go! Officer Shen, we'll be leaving now."

He said hello and then left with his entourage.

Zhao Qingsong looked at Shen Wanqing without saying anything, but smiled and nodded slightly as a greeting.

……

After the two came out, Zhao Qingsong looked at Gao Dazhi and asked, "Brother Gao, would you consider this a clue?"

Gao Dazhi thought for a moment, then shook his head: "I'm not really sure about that. I just asked Director Chen, and she told me that it's difficult for us to investigate the usage of this kind of thing! We might get accused of being indecent!"

His face showed embarrassment.

Zhao Qingsong understood as well.

Times have changed. Without evidence, investigating someone's gynecological problems can really be considered indecent.

"So, we'll just leave it at that?"

Gao Dazhi shook his head: "Let's go back first and talk to the section chief about this. It seems we need to investigate Xu Qiang's family more thoroughly. Too many coincidences are suspicious. Now we just have to wait and see if that person can be caught."

"Um!"

Zhao Qingsong hummed in agreement and said nothing more.

The two walked together toward the department.