Then skim off the layer of soap on the surface, leaving only the underlying glycerin, but now glycerin, but even Guo Minhui understands the remaining steps, Wu Yi is trying to make nitroglycerin!

After Wu Yi did all this, he carefully poured the HSO into the glycerin, but there was no reaction, until Wu Yi poured the HNO₃ into the glycerin again, and carefully stirred again, and this time, the water surface began to layer again, and a layer of colorless, transparent, odorless, viscous liquid floated on the water, in stark contrast to the water surface below.

And that's nitroglycerin!

Next, as long as this nitroglycerin comes into contact with potassium permanganate, an explosive reaction will be produced, which is the most primitive explosive!

Then, with the help of Guo Minhui, Wu Yi evenly applied the made nitroglycerin to the pair of handcuffs that connected the water pipe to the handcuffs, and when he poured potassium permanganate in his hand, the explosion would occur.

But Wu Yi was a little hesitant, because he didn't know what the power of the explosion was, if the power of the explosion was too great, it would not only be as simple as the handcuffs would be broken, but the wrists of the two would also be gone, but if the power was too small, and the handcuffs were not blown up, then everything that had been done before would be wasted!

But his trembling right hand was held by a soft and warm plain hand, which stabilized his arm for him.

And behind him was suddenly hugged by Guo Minhui, only to hear her whispering in her ear.

"I'm with you.".

"Good!" Wu Yan seemed to have gained courage, and poured all the strong oxygen agent potassium permanganate in his hand into the handcuffs coated with nitroglycerin.

The moment was so long.

Purple-black, slender prismatic crystals flew in the air and kept approaching the chains, touching, blending into them, dissipating, and beginning to produce a series of earth-shattering reactions from the atomic level, and finally with a loud bang, a huge impact came down the connected handcuffs, and the strong impact made both of them feel a sharp pain in their wrists for a moment.

But the next second, each wrist was on top of his arm, and the handcuffs that connected the two handcuffs to the water hose had been broken in two under the explosion.

"Hahahaha, it worked! I'll just say we're going to get out! When I'm out, I'm going to kick that prisoner in the face twice! After the success, Wu Yi was excited and wanted to give Guo Minhui a hug directly, but after seeing the current state of the two, he withdrew his hand stupidly.

"Huh? It's not over yet! Think about how to open that door, my great chemist! Guo Minhui, who was already ready to accept Wu Yi's hug, saw Wu Yi actually scrambled back at the critical moment, and her words were instantly full of dissatisfaction and complaints.

I don't care too much about a girl myself, how can you old rascal always look polite at such times!

"Yes, yes, let's go see that door first!" , Wu Yi, who was excited, didn't notice the complaint in Guo Minhui's words, and hurried to the password door, but when he saw this door, Wu Yi's previous excitement was extinguished by reality again.

The password door in front of you must be entered into the right code to open, not to mention the lock is picked open, there is not even a keyhole on the whole door, if you want to get out, you only destroy the metal bolt, the radius looks like it is 5 cm long!

And the deadbolt was set high at the very top of the entire door, three meters above the ground!

The situation seemed to sink into despair again in an instant.

"It's all come to this, how can you give up casually!" , Wu Yan looked at the high door bolt, and was thinking quickly in his heart, he had used up all the nitroglycerin just now, and now there were no more explosives in his hands, not to mention that the previous power was just to blow up the prisoner's handcuffs, and if he wanted to blow up this thick door bolt, the power was not enough!

"Let's see it early, maybe there's something useful here." Wu Yan began to take Guo Minhui to search in this secret room, but he never found anything useful.

"Wu Yi, open that cabinet and take a look." Together, the two of them rummaged through the entire chamber, and now the cabinet that had been closed was left.

"Ahh , However, as soon as Wu Yi opened the cabinet, the contents made Wu Yi scream in fright, and after Guo Minhui next to him saw it, he also covered his mouth instantly, and couldn't make a sound for a long time.

Because in the huge cabinet in front of me, there are four floors, and five glass jars are placed on each floor, and those glass tubes are actually lifelike human heads that have been soaked in formalin solution and preserved!

Thinking of the rubber duck in the travel bag before, this prisoner actually kept the victim's head himself and replaced it with a rubber duck!

"This man must be psychopathic, oh my God, how many people have been killed!" , Wu Yi said in a daze, he thought that he had seen enough human beings kill themselves for various reasons, but everything in front of him was once again beyond his belief, because he didn't know what benefits this prisoner could get after killing these people!

"I'm going to bring him to justice!" , Guo Minhui looked at these unjustly killed heads, and her tone was firm and unquestionable.

"But now ... Let's do something for me first! Wu Yan's face suddenly changed, and he was a little embarrassed.

"What's the matter?".

"Help me get these ... Take the head out of the formalin solution, this formalin solution is still useful for us! ”。

"Oh my God! Are you the devil? Guo Minhui looked incredulous, you actually let me contact these weird-looking heads!

"Ahem, how can I speak, I'm not a devil!" , but Wu Yi was quite serious, and took the initiative to start transporting these specimens, and while carrying them, he was still chanting words on his lips.

"Heavenly Spirit, Earth Spirit, don't come to me, it's the murderer who killed you, and it has nothing to do with me, oh, and her, it has nothing to do with her, Heavenly Spirit, Earth Spirit."

"Phew! Don't talk about this kind of unclean words, the solution is cleared out, and then you are going to boil these formalin solutions", Guo Minhui, who endured nausea, finally took these specimens out of formalin one by one, but now she finally understood Wu Yi's purpose.

Formalin is a formaldehyde solution, and the vapor of formaldehyde can form an explosive mixture with air, and the gas will accumulate upwards, and only a little spark will be enough to blow up the deadbolt three meters above the ground!

And the required ignition agent, ether is also in this secret room, I saw Wu Yi pick up the water pipe that was blown up before, and hit the metal handle position on the heavy code door, and the spark that struck down instantly ignited the ether with a flash point of only 12 degrees, and then Wu Yi put all the things that could be burned in this room, and waited intently for the boiling of the formaldehyde solution.

In the end, Wu Yi and Guo Minhui lay on the ground tightly, and stretched the fire hose with the tip of the cloth in their hands to the ceiling.

Bang!

Far greater than the previous nitroglycerin impact, the eardrums of the two were deaf at this moment, the sound of consciousness drifting continued to echo in their minds, and the deadbolt was also blown off, falling down, click, and the dusty door was finally opened.

"I suddenly realized something!" , Wu Yan, who was lying on the ground, seemed to be thoughtful.

"What's the matter?" , Guo Minhui has quickly gotten up.

"If there are rats here, there may also be rat holes, so how can there be a lack of oxygen?"

"Are you saying that all of this is really just the prisoner deliberately scaring us in order to force us to kill each other?"

"I don't know, but I'm afraid the people who were locked up here before have been...

Fear will spread, especially before the fear of life and death, how many people can think calmly, and how many people will let go of the evil intentions in their hearts.