"Of course it's on." Xu Haoran flippantly unloaded his backpack and put it in front of Li Hang.
Li Hang opened his backpack and took out a bottle of concentrated hydrochloric acid and concentrated nitric acid from it, then carefully opened the cap and poured both types of hydrochloric acid into a huge container.
The moment the concentrated hydrochloric acid and concentrated nitric acid were mixed, the pungent smell that evaporated caused everyone to cover their mouths and noses.
"You're making aqua regia?"
In the crowd, someone couldn't help but shout out.
Li Hang nodded at that person and then said, "This aqua regia evaporates very quickly, we must reach that location where the sewer exit is sealed within half an hour."
After saying that, Li Hang was about to grab the glass beaker with his bare hands, which shocked the crowd and caused them to draw a breath of cold air backwards.
It was important to know that aqua regia was highly corrosive and was one of the few substances that could dissolve even inert metals.
If a person's skin was even slightly contaminated, it would be a disaster.
But Li Hang had grabbed the freshly proportioned potion with his bare hands without any protection, which was simply incredible, even daring!
At this moment, those who had chosen to stay and follow Li Hang in and out suddenly felt a sense of relief, they felt that they had followed the right person.
Li Hang took the lead in entering the sewers under the watchful eyes of a group of people, while Gu Yanxi and Xu Haoran both followed in Li Hang's footsteps and dove in at the same time.
The group of people behind them looked at each other and also followed the three without hesitation, diving into the sewers.
The aperture of this sewer was so large that an adult could pass through it without any difficulty with a half-bent body.
Although there was a disgusting stench emanating from the surroundings, we didn't care about the suffering compared to surviving.
Li Hang followed the impression he had of the school's underground pipe structure in his mind and led a kind of people around inside the curved pipes, and soon, he led a group of people to an iron fence.
"Here we are, finally! Great! We can finally get out of this hellhole."
A crowd of people behind him cheered, but Li Hang remained unchanged as he carefully poured the corrosive liquid bit by bit onto the posts of the iron fence.
Everyone's eyes were fixed on the spot where the royal water came into contact with the fence. Just the moment the liquid was poured on, although it also produced a very powerful corrosive effect, the corrosive effect was not very obvious.
By the time Li Hang had used up the only small cup of aqua regia in his hand, the thick steel bars of the fence had only thinned slightly, and had not been melted off.
Seeing this, the crowd behind them were all anxious and they were all a bit agitated.
"What's going on? Is there any mistake! How come we only prepared such a small amount of potion, hurry up and dispense some more! The king's water is simply not enough!"
"There's none, the potion has already been used up." Xu Haoran said without good grace.
As soon as he said that, the crowd became furious and someone immediately shouted out of control, "What the hell are you doing? Why don't you take more concentrated hydrochloric acid and nitric acid, you're killing us!"
Xu Haoran understood this group of people, they were simply selfish and self-serving people, full of only themselves.
Xu Haoran jumped up on the spot, pointing at the group of people and cursing, "Who the hell is running around with bags of concentrated hydrochloric acid and concentrated nitric acid on their backs, they will be corroded to death by the leaking liquid without waiting for the zombies to bite them to death!