The situation in the laboratory building really seemed to be as Qi Lin had judged, there was no existence of the king spider, and the number of servant spiders was really much less than the teaching building he had broken into for the first time.

All the way up to the second floor, there were only a few sporadic servant spiders, and before they could find Qi Lin, they were directly solved by Qi Lin neatly.

According to the floor plan at the entrance, the second floor is the chemistry laboratory.

Of the eight chemistry laboratories, Qi Lin directly chose the one closest to the staircase.

The metal door was an old mechanical lock, Qi Lin took out a metal hairpin, and easily pried the door lock open - as soon as he pushed the door open, a disgusting smell came to his face, and along with this smell, there was a tall humanoid figure, which slammed into Qi Lin at the door.

"Zombies?"

Dark vision easily helped Qi Lin see the face of the figure clearly, it was an "iron arm zombie", and he was still wearing a tattered white coat.

As the name suggests, the two arms of the iron-armed zombie, due to the relationship between the virus and radiation, a large amount of cuticles are abnormally accumulated, becoming like two thick hammers.

If the swift zombie is a killer who uses high agility to pounce on the weakness of the prey, then the iron-walled zombie is the heavy infantry that is hard to shake head-on, and the two "iron hammers" are simply the best weapon to break the defense of heavy armor.

In the face of the attack of the iron-armed zombie, Qi Lin passed under the opponent's armpit with a dodge, making this "open door kill" empty, and then turned around and dragged the neck of the iron-armed zombie, and the cold light of the curved hunting knife flashed, and the entire head of the zombie was cut off!

"Boom!"

Although Qi Lin held the corpse of the zombie and also caught the falling head, the arms on the side of the zombie could not take care of it, and the falling arms smashed on the floor, making a loud noise-

"It's over!"

Qi Lin's heart was cold, this movement, it is estimated that the Assasin crypt spiders in the entire building can feel it!

However, three minutes have passed, and not a single servant spider has appeared on the second floor, as if the few servant spiders that Qi Lin killed on the first floor just now are all the Assasin spiders in this experimental building.

If it is said that the servant spiders are attracted by Luo Xiang and them, it makes no sense at all, according to the calculation of at least a thousand servant spiders in a "nest", the total number of servant spiders in the entire campus should be about 7,000 to 8,000, so many servant spiders, how can they all be attracted by Luo Xiang and them at one time!

It doesn't make sense!

However, no matter how strange Qi Lin felt, the operation still had to go according to the original plan, putting aside the corpse of the iron-armed zombie, closing the door, Qi Lin strode into this old chemistry laboratory.

This university can only be regarded as a second-rate level in the old era, and the laboratory naturally cannot be compared with those such as Peking University and Tsinghua University, at most it plays a role as an auxiliary teaching.

The laboratory is about 200 square meters, in addition to an oversized electronic blackboard and a lectern table, there are more than a dozen experimental tables, and at the back of the laboratory, there is a row of cabinets for chemical reagents.

In addition to the iron-armed zombie, there are also several corpses lying in the laboratory that are also wearing white coats, and these corpses should have been teachers and students of this school before their deaths. Qi Lin casually checked the corpses, half of these people's bones were blackened, obviously from high doses of radiation, and half of them, there were several comminuted fractures and gnawing marks on the bones, which should have died from the iron-armed zombie.

Qi Lin wasn't in much of the mood to pay attention to these dead people right now, and only after making sure that there were no living creatures in the entire laboratory did he begin to carefully scavenge for what he needed.

All kinds of glassware, iron stands, alcohol lamps...... There are a lot of things on the experimental table, and if these old-time precision tools can be brought to Thunder City, they can almost be sold for a good price, especially those players who are still addicted to scientific research in the game, and are absolutely willing to pay a lot of money for these things.

However, Qi Lin didn't come to scavenge waste, and the backpack space and weight also limited what Qi Lin could take away this time, only those chemical reagents that were the first target.

Anyone with a certain chemical foundation knows that nitroglycerin and ammonium nitrate are powerful explosives, and Qi Lin's target this time is concentrated nitric acid, concentrated sulfuric acid and glycerin, which are common in the laboratory.

Catalyzed by concentrated sulfuric acid, glycerol and concentrated nitric acid will form glyceryl trinitrate (commonly known as nitroglycerin) and water.

Nitroglycerin is unstable, once it is hit by machinery, it is easy to explode, and the same kilogram of nitroglycerin is 16 times more powerful than black powder when it explodes, and the famous TNT is only 14 times that of black powder.

Many of the reagents on the laboratory table have been knocked over, so it is likely that there was a fierce fight here - if there is no third party involved, the two sides of the fight should be the survivor who locked himself here and the zombie with the iron arm who suddenly mutated.

There were shards of glass everywhere, and the few complete beakers on the laboratory table were also empty—most of the chemical reagents were either volatile or deteriorated after being left unsealed for three years, which was why Qi Lin smelled the disgusting smell after opening the door.

In addition to the unpleasant smell, this strange smell is also slightly toxic, and Qi Lin's blood has been slowly losing blood since he stepped into this laboratory, but due to the existence of the rapid recovery skill, it is basically full as soon as the blood falls.

There was nothing Qi Lin wanted on the laboratory table, and Qi Lin quickly set his sights on the locker behind the laboratory, but with just one glance, he couldn't help but scold his mother in his heart.

The glass vitrines of the locker were almost all smashed, and the reagent bottles inside naturally could not survive -

Some angrily kicked the corpse of the iron-armed zombie, and Qi Lin stupidly exited the laboratory - there were seven more, and he didn't believe that in each laboratory, there was a zombie with a desire to destroy.

Qi Lin glanced out the window of the corridor, the movement in the distance was much smaller, and it seemed that Luo Xiang and they had withdrawn from the school according to the plan after attracting a large number of servant spiders.

It's now two and fifteen, and according to the agreement, Qi Lin still has fifteen minutes to collect chemical reagents, and at half past two, Luo Xiang will launch a feint attack on the nest of the Assasin crypt spider again, covering Qi Lin's retreat after getting the reagents.