"Boom!" The sound of the BMW's engine is particularly harsh in the quiet city.

The staggering zombie looked up in confusion and looked in the direction where the sound was coming from. I saw a BMW X5 rushing from a distance, as if a wild horse was approaching sharply.

When the hungry zombie excitedly realizes that something is coming, "Bang! With a muffled sound, the roaring front of the car had already rushed straight over, smashing it off the waist.

"Squeak!" The wide wheels directly crushed the fragile and half-rotten lower body of the zombie, and the upper body clinged to the front of the car under the action of inertia, until the car stopped a hundred meters away, and then lost the air resistance support and fell heavily.

After the car stopped, Mu Yan, who was in shock, held the steering wheel tightly, and Jiang Sen took out a set of delicate small measuring tools from the bottom of his backpack and swung them on the driver's platform one by one. Then he took out a bag of salt, tore open the plastic seal, scooped out the white salt powder with a measuring spoon, and put it into a balance weighing pan that was pressed with weights to stabilize the specific gravity. After carefully counting the quantity, the powder is put into two 500 ml tubular polyester bottles, filled with clean purified water, and stirred well.

Since the salt content has exceeded the solubility of water, the white liquid inside the tube is quickly revealed by the transparent glass wall.

Mu Yan in the cab looked at Jiang Sen's series of actions curiously, and said, "What is this?" ”

Jiang Sen opened the bloodstained car door and stepped out of the car, looking curious, Mu Yan did not explain, but gave her a gesture to get out of the car, picked up the fire axe, and fiercely cut off the two arms of the half zombie in front of the car.

After that, Jiang Sen instructed Mu Yan to take out an iron rod with a length of more than two meters and a "Y" shaped fork in the front section from the car, and let her clamp the zombie's neck hard, pressing it to the ground, unable to move.

The iron rod was welded by Jiang Sen from various materials in the hardware shop last night. In the future, this kind of thing is an essential tool for all corpse hunters.

Jiang Sen squatted down, picked open the bloodstained clothes on the zombie's body with a dagger, and then gently cut the flesh on the zombie's back with the tip of the knife.

The erosion of the virus, coupled with the damage to most of the physiological functions, made the muscles of the valgus show large gray spots, and because it is a zombie that has just mutated, a large amount of water left in its body immediately turns into yellow thick juice and oozes out, and the blood of the zombie has already coagulated into a jelly-like gel and no longer oozes.

Along the cut with the tip of the knife, Jiang Sen concentrated on searching for the broken ligaments and muscles. Soon, slightly lower in the back of the neck, a large blood vessel, still dark red, revealed from the depths of the peeling muscle.

He took out a bottle of highly concentrated salt solution from his backpack, inserted the syringe into the rubber stopper, pulled out twenty milliliters, pulled it out, and then stuck the needle into the blood vessels in the zombie's back. As the white solution was slowly pushed in by the piston, the zombie that was firmly stuck in the neck by the sleeve rod also howled wildly as if it was stimulated. Its eyeballs immediately began to swell, bulging outward, and filling the entire eye socket. The body twitches violently like an epilepsy patient. If it weren't for the loss of his hands, feet and limbs, Mu Yan would not have been able to suppress it at all, but was torn to pieces on the spot by this terrifying man-eating monster.

Jiang Sen looked at the zombie seriously, pressed the opponent's constantly twisting head with his left hand, and quickly took out another prepared empty syringe from his backpack with his right hand. He thrust a thick, hard needle at least fifteen centimeters long into the back of the zombie's head, and jerked the piston backwards, pulling out a tube of gray-brown pus from the already hot veins.

The zombie kept howling, and as the mysterious pus was drawn from its head, it also completely lost the motivation to struggle, tilting its head, opening its mouth wide, and its body gradually stiffened.

Watching Jiang Sen inject pus into a hose with a capacity of five milliliters, Mu Yan, who was still pressing the zombies on the ground fiercely, asked curiously, "What is this?" ”

"Erotic solution"

Jiang Sen's voice was as calm as usual, but Mu Yan still heard it, with a faint excitement in it.

Like white stones, corrosive solutions are one of the most important strategic materials in the future world.

Energy is conserved, people are infected and mutated into zombies, and some magical things will also be transformed, so as to achieve the conservation of energy. In the study of zombies by biologists in later generations, it was found that the zombie brain secretes a viscous gray-brown fluid. It is this special active liquid with extremely high activity that supports the survival of zombies for a long time.

Soon, driven by scientific research, this gray-brown liquid became the main ingredient in genetic drugs and zombie vaccines. These agents are used in a wide range of applications, in addition to strengthening the physical fitness of the user, and more importantly, they can activate cells and prolong the metabolic effect. In other words, it is not only able to treat diseases, but also prolong life.

In future history, the year 2120, when the virus first broke out, was recorded as a "golden age". The reason why it is called the "Golden Age" is not only because the stones that achieved basic evolution are common in this era, but also because the conditions for the production of corrosive solutions are very harsh, only the concentration of corrosive solutions is highest in the early stage of zombie mutation, and after a period of time, the survival of zombies will continue to consume this corrosive solution.

All known variants can obtain this corrosive solution by stimulating the cerebral cortex. In the future, corpse hunters usually inject a high concentration of sodium chloride solution into the monster's central nervous system, and the sodium ions in sodium chloride will be replaced by a new ion, thus reflecting a new chlorinated solution that can be used by humans, and this chlorinated solution is called a "corrosive solution" because no one is sure of the chemical properties of this new substance, but because this solution is highly corrosive, people are used to calling it a "corrosive solution".

The method of extracting the corrosive solution is simple, but it is dangerous: inject a high-concentration salt solution into the brain of a living zombie, and then use a syringe to extract it from the monster's head when the stimulation effect is at its strongest. The whole process was exactly the same as Jiang Sen's action just now. One of the most critical parts is that from the injection of the stimulation solution to the whole process of hormone extraction, the monster must remain alive, once it dies in the middle, the extracted solution will be a highly infectious zombie virus.

Viruses have the ability to evolve themselves, and so do the infected people they parasitize. According to the concept of the future world, the infected people at the beginning of the virus outbreak are the weakest. Among the many monsters' rating tables, they are at the bottom of the table, and most of them are "1", or "-1".

In the era of the future, low-level monsters have completed the most basic evolutionary link. According to official data, most of the creatures observed in the wild have a minimum standard of "3" to "4". Like humans, their skeletal muscles are also strengthening, and even if they cut off their limbs after capture, there are still many monsters that will erupt with incredible ferocity during the stimulation of the infusion of potions. Jiang Sen has seen more than once that the neck of a monster is stuck in a steel ring, but he uses his own strength to forcibly break his spine, commit suicide, or bite the throat of the catcher next to him.

Catching and hunting monsters is easy, but the thrill is often unexpected. Others have tried dilutions that are not so stimulating, but they do not produce hormones in the cerebral cortex.

Corrosion solutions belong to the top strategic materials in the world in the future. It is expensive to sell and the production is extremely low. As far as Jiang Sen knew, even the American Western Group he worked for before his rebirth only collected about fifty milliliters a year.

Only the lowest level of "-1" or "1" level zombies is the best carrier for extracting corrosive dissolution. However, in the future world, they have long since become extinct, or have evolved into higher-level monsters.