Ammonium nitrate is a colorless and odorless transparent crystal or white crystal, soluble in water, easy to absorb moisture and agglomerate, is an oxidant, mostly used in fertilizers and chemical raw materials.

Wen Jike is now embattled, he risked being captured by us to come here and take a large bottle of ammonium nitrate for fertilizer, I really can't imagine what this chemical oxidant can do to him.

Judging from Wen Jike's current actions, it seems that he has no intention of escaping at all, and the only purpose and reason for him to stay can only be An Rongyue, Wen Jike is still thinking about saving An Rongyue.

Nangong Yi immediately dispatched military police to add security to the basement ward of Building 19, worried that Wen Jike's dog would jump off the wall in a hurry and choose to take risks.

It is indeed easy for the Hede Medical College of Nuoda to hide a person, and so many military and police officers have been dispatched to conduct a carpet search for so long and have not found any clues in Wen Jike, and the longer it drags on, the more worried I am.

The so-called knowing oneself and knowing the other side will win all battles, but in fact we don't know Wen Jike, everything he shows us or shows is fake, psychologically speaking, to predict Wen Jike's behavior, you must first understand him as a person.

I said to the others, I want to go to the place where Wen Jike lives, and I want to have a more comprehensive understanding of him as a person, Yun Duruo should be worried that I am not safe alone and insist on going with me.

The place where Wen Jike lives is the 403 dormitory where the murder occurred before, and there are so many vacant rooms in the idle girls' hospital, but anyone who is normal will not choose to live in a room where four people have died, I regret it a little that I obviously felt Wen Jike's abnormality at that time, but I didn't investigate.

Nangong Yi was also worried that it would be difficult for the two of us to deal with an unexpected situation, so she specially sent two armed police soldiers to follow, and when they entered Wen Jike's room, they stood outside on guard.

Wen Jike cleaned up the room very neatly, not like the sloppy impression he gave us, the room was spotless and the things were placed in an orderly manner, and there was nothing else in the wardrobe except a few changes of clothes, Yun Duruo found a wooden box under the bed, one large and one small, and pulled it and found that it was very heavy, and I dragged it out with her.

Open the small wooden box and fill it with books, these books are related to hypnosis and the treatment and prevention of mental illness, almost every page is carefully filled with annotations, which shows how attentive and serious Wen Jike is when reading these books.

"It seems that Wen Jike has been secretly studying the knowledge of hypnosis." Yun Duruo glanced at it and said worriedly. "As for the psychiatric treatment, it seems to help An Rongyue."

These are very profound and highly specialized books, it is estimated that even students who study this knowledge are difficult to understand and see thoroughly, I have flipped through several books, judging from Wen Jike's annotations to the book, he may have mastered a strong hypnotic ability.

I flipped through these books one by one, almost all of them were hypnosis and psychiatric prevention and control, and I was able to read these boring contents completely and so seriously, which shows how calm Wen Jike's character is, when I took out all the books in the box, my eyes fell on the title of a book at the bottom of the box.

Principles of architectural construction.

This book is obviously completely out of place with other books, judging from the dilapidated degree of this book, Wen Jike may have read it more than once, I took it in my hand and opened it to find that this book was the same as other books, and was full of annotations by Wen Jike with a red pen.

"What is Wen Jike doing with a good reading of books on architecture?" Yun Duruo asked curiously.

I don't know Wen Jike's intentions, from his character, he should be a very focused person, a person who can hide secrets for more than 30 years will have his purpose in doing anything, even if he reads books, I can understand his intention to read books on hypnosis and mental illness prevention, but I really can't think of his intention to read books on architecture.

Suddenly, a page of folded paper fell out of the page in my hand, it should have been stored in Wen Jike, Yun Duruo picked it up from the ground, and unfolded the paper in front of me, it was a hand-drawn architectural drawing, how did I look a little familiar.

"This ...... This seems to be a newly renovated teaching building of Hede Medical College. Yun Duruo recognized it after looking at it for a long time.

It dawned on me that it was no wonder it was so familiar, several times on this hand-drawn drawing, the places were marked with a red pen, although I didn't know anything about architecture, but how to look at these red places are the foundation of the building, the more I looked, the more confused I couldn't guess what Wen Jike wanted to do.

Yun Duruo saw that there were no useful clues found in the small wooden box, turned around and opened the big wooden box next to him, a thick and pungent chemical agent smelled and wafted out, Yun Duruo subconsciously covered his nose, my attention was still on the construction book over there, and I repeatedly figured out Wen Jike's mentality and thoughts in my heart.

Yun Duruo said blankly behind me as he rummaged through the chemicals in the wooden box.

"What kind of chemicals are these, what does Wen Jike want to do by secretly storing so many chemicals? I'll take a look at what's in it. ”

Behind me, I heard Yun Duruo pick up the glass containing the chemicals and read the label on it.

Potassium nitrate...... Is this a diesel? This bottle is ......

Yun Duruo said to himself behind him very puzzledly, what is a sensitizer?

I was still flipping through the book on the construction of the building in my hand, and when I heard Yun Duruo's words, I was stunned in shock, and quickly turned my head and took the glass bottle in Yun Duruo's hand, which said that it was indeed a sensitizer, and then looked at the chemicals that Yun Duruo placed on the table, and the corners of my mouth squirmed and said in surprise.

"Potassium nitrate is an oxidizing agent, while diesel is a combustible agent, and when you add a sensitizer, you only need to add a chemical to turn it into a huge explosive that destroys it!"

"What else do I need to add?"

"Ammonium nitrate!"

"......," Yun Duruo looked at me in surprise, and it was only a genius to come back to his senses. Wen Jike secretly sneaked into the chemical laboratory to get ammonium nitrate in order to make explosives! ”

I nodded.

"Why did Wen Jike make explosives...... Yun Duruo realized the seriousness of the problem halfway through his speech. The reason why Wen Jike stayed here and didn't abscond was to save An Rongyue, and he did everything possible to collect these chemical raw materials to make explosives in order to blow up the basement ward. ”

"Nope! The place where Wen Jike wants to bomb is not the basement ward. I shook my head and said no.

"Not a ward? So where is he going to bomb? ”

I raised my hand and placed the hand-drawn architectural drawing that had just fallen out of the book in front of Yun Duruo.

It's a school building!

Wen Jike's target is the newly built teaching building, and the places he marked in red on the architectural drawings are all the most important load-bearing support buildings of the teaching building, and once these places are blown up, the entire teaching building will collapse in an instant.

"This news must be notified to Nangong Yi immediately, and she should be asked to dispatch military police to strengthen the vigilance of the teaching building." Yun Duruo said as he walked out.

I frowned and stared at the chemicals on the table, thinking in my heart that Wen Jike was supposed to blow up the ward, why did he want to blow up the teaching building, if the purpose of his stay was to save An Rongyue, even if he blew up the teaching building, it would be useless, let alone assembling these chemical explosives......

Assemble!

I was suddenly shocked, Wen Jike risked being captured and wanted to sneak back to the chemical laboratory to steal ammonium nitrate, which means that he has not prepared all the chemical raw materials needed to assemble explosives, so he took the risk to get ammonium nitrate, and now he has obtained the final materials for assembling explosives, so Wen Jike will ...... next step

Thinking of this, I turned around suddenly, and the whole person was stunned in place, I really didn't guess wrong, Wen Jike's next step is to come back and take these chemical raw materials to assemble explosives!

The muzzle of the black hole was against Yun Duruo's temple, and the two armed police soldiers in charge of guarding at the door were now lying on the ground, Wen Jike's expressionless face was hidden behind Yun Duruo's head, only revealing his unusually bright eyes staring at me.

I should really take a good look at the person in front of me who has been disguised for thirty years, maybe even his name is fake, I know almost nothing about this person, I thought that in the face of so many military and police chasing and intercepting, Wen Jike should be like a lost dog fleeing everywhere.

But when he stood in front of me, I realized that he was not afraid at all, I had never seen a suspect who could be calm in the face of such great pressure, it was definitely not the Wen Jike I saw before, his calmness and indifference made me a little confused.

I saw Yun Duruo winking at me, I thought she was ready to take advantage of Wen Jike's unpreparedness to fight back, I slowly shook my head at her and signaled her not to move, if it was someone else who held her hostage, but whenever I saw a trace of panic in that person's eyes, I would believe that Yun Duruo's skills would turn the tide, but what I saw in Wen Jike's eyes was only almost rock-like perseverance and calmness.

In the face of such an opponent, I would never dare to let Yun Duruo put himself in danger.

Wen Jike slowly raised his hand and gestured to me, he meant to let me stand in the corner, I stepped back according to his request, and when I reached a place where he thought it was safe, he pushed Yun Duruo to my side, I hugged her and pulled Yun Duruo behind me, looking directly at Wen Jike's gloomy eyes in front of the muzzle of the black hole.

After Wen Jike made sure that we were not in danger to him, he slowly retreated to the table, put the gun he had snatched from the armed police within reach, sat down very calmly, and watched our every move from time to time, and then carefully put together those chemical raw materials in front of me and Yun Duruo.

Seeing that Wen Jike's movements are very skillful, he must have been familiar with the process of assembling explosives, Yun Duruo tried to stop her several times, but I held her hand tightly, with the distance between us and Wen Jike, Yun Duruo could not be as fast as Wen Jike to get a gun even if he was agile.

If Yun Duruo wasn't here, I thought that even if Wen Jike fired, the gunfire would become an early warning prompt, and Nangong Yi and the others would definitely rush to surround Wen Jike as soon as possible, but Yun Duruo was right next to me, and any impulsive behavior of mine would endanger her life.