Chapter 1531: Longtan Tiger Den in the depths of the ground

This is no ordinary sewage treatment tank.
It is a special equipment similar to a reactor.
The thickness of the outer wall of each metal tank exceeds that of the main battle tank's reactive armor.
During the operation, a large amount of chemical substances and genetic medicines must be injected into it, so that the experimental residues, monster feces and various waste materials can be barely neutralized and diluted to the extent that they will not cause serious damage to the environment and will not leave clues. .
Judging by the squeaking of the valves above several metal cans, scalding scarlet steam.
Meng Chao had a hard time imagining what kind of dangerous substances they were dealing with, so they needed to be so careful, as if they were facing a big enemy.
Even after repeated treatment in more than a dozen processes, the sewage that is finally discharged into the underground river still contains a large number of blood pattern spores, strong radiation and heavy metal substances.
"Damn, these daring bastards, are they hiding here and injecting blood patterned flower spores into the blood vessels of the doomsday beast?"
Meng Chao muttered to himself.
In addition, he also found burns, tears and repair marks on several metal cans.
The bases of several metal cans also seem to have been installed recently.
All indications are that a small explosion has occurred here.
There are shock waves from the explosion everywhere, and traces of whistling past.
After pondering for a moment, Meng Chao felt that it was the small-scale earthquake not long ago that caused a serious failure of the sewage treatment system. The failures accumulated to a critical value and caused an explosion, which caused a large amount of sewage to flow to the surface along the underground river. above.
"Strange, judging from the style of the operator behind the 'Horizon', he should be a very cautious person.
"If the sewage treatment system is damaged like this, it is possible that a lot of 'evidence' will flow out of my control. According to the behavior of the behind-the-scenes operators, the experiment should be stopped immediately, and the sewage treatment system should be completely repaired. The new tributaries of the Underground River after the earthquake will be slowly started.
"Why, the other party knows that there is a risk of exposure.
"You still have to carry out high-intensity experiments day and night, and discharge so much sewage that you are found to be flawed by the 'Tailed Monkeys'?
"There's only one possibility.
"The other party can't wait.
"He must produce the experimental results in the shortest possible time - blood pattern spores that can be applied to actual combat and act as biological weapons!"
Beads of sweat ooze out from Meng Chao's forehead.
I can't wait to get into the reactor now, follow the pipeline, and climb all the way to the blood pattern laboratory hidden behind the sewage treatment system, deep in the layers of rocks.
But this is not possible.
Because the inside and outside and up and down of the sewage treatment system are full of burly men with guns and live ammunition.
Their stature is strong, like brown bears standing up.
His eyes were sharp, like a hungry wolf.
While patrolling, it was silent. Even wearing boots with steel plates embedded in it, when walking, it was still as light and secretive as a cheetah.
This sewage treatment station, which is buried nearly 100 meters underground, obviously can't even fly in a mosquito.
During the one and a half years they were here on duty, there must have been no intruders, who would sneak in all the way from the underground river filled with super-strong radiation and heavy pollutants, and inhabited by deformed monsters.
But the sight they cast to every corner of the cave was still as cautious and keen as they were on duty for the first time, and they didn't feel bored at all.
Meng Chao felt several times that these guards' gazes swept across the tip of his nose like a polished sickle.
If he hadn't broken through to the realm of the gods and had also practiced the corpse-walking technique specially used for stealth, Meng Chao felt that he was likely to be detected by them.
These guards are masters.
They have definitely killed people, seen blood, and seen their organs being pulled out from between their chest and abdomen by monsters, but they were able to take their organs back without changing their face, stuff them back, and then cover their stomachs and kill the monsters. experience.
And on the bright side, those security guards whose paper parameters are not satisfactory are definitely two different things.
Meng Chao scanned a total of 18 guards.
Their patrolling routes intersect and overlap each other, ensuring that every guard is within sight of at least three of their companions at the same time.
No, not eighteen.
The last guard was very cunning, hiding in a specially made hole above the cave wall.
The hole is less than one meter in diameter.
It was surrounded by mirror-smooth rock walls that were perpendicular to the ground and had no foothold at all.
The opening of the hole was blocked with a whole piece of special armored plate on the anti-aircraft gun, and only small holes for observation and shooting were exposed.
This is an advanced sniper.
Through the observation hole, I could just see every move of the other seventeen guards clearly.
Even if there is an intruder, it can sneak behind every guard like a ghost, and cut the throat of all the guards before the guards are awakened.
This scene will also clearly appear in the sniper's scope.
Moreover, Meng Chao has no doubt that his hiding place must be strange, connected to some kind of alarm system, and can even determine whether an alarm needs to be automatically issued by monitoring changes in physiological parameters.
After all, snipers are extremely calm, and in most cases, they can precisely control physiological parameters.
If his breathing, heartbeat, blood pressure, and even the oxygen content in his blood changed drastically because of Meng Chao's attack, the alarm would sound throughout the Blood Pattern Laboratory.
That was the scene Meng Chao didn't want to see the most.
No, it's not just these well-trained guards.
Meng Chao also found dense monitoring probes, detectors and information collectors around the cave, including inside and outside the sewage treatment system.
The density of these monitoring facilities is like a minefield where dozens of mines have been repeatedly sown.
One thing to say, this is not necessarily used to prevent intruders.
It is mainly to monitor the sewage purification, the geological changes around the purification system, and to prevent the destruction of mutant organisms.
Although the vast majority of mutant creatures have relatively developed intelligence, they dare not offend this hidden dragon pond and tiger den.
But under the modulation and stimulation of the blood pattern spores, there are always some daring outliers, moths to the flames, seeking their own death.
Now, these information collectors have become insurmountable copper walls that lie in front of Meng Chao.
When Meng Chao closed his eyes and overlapped the patrol route of every guard he had just scanned, as well as the monitoring range of each heat source monitoring probe and information collector, he was surprised to find that his field of vision was surrounded by dense , obscured by the scarlet light representing "danger".