"Ding, data transfer completed~"

Zhang Xu took out the holographic board and showed a three-dimensional topographic map, and it was very easy to find his breakthrough point - the suspension of the railway!

What is the most built country Z in the 23rd century? Many people say that it is a highway, extending in all directions, and even the mountainous areas are covered, but unfortunately the answer is wrong, it is the railway!

Railway transportation is one of the economic sources of country Z, and the whole world invites our workers to build in other countries, for no other reason, we are the most technological!

A complete railway system can make the urban economy on both sides of the railway continue to increase, the time is decades or even more than a century, now the traffic is developed, the ground can not run on, many for the air train upside down, but more built underground, the subway was originally used for travel, now more for the transportation route, will not disturb the residents because of noise, and will not worry about the climate and accidents, the biggest difficulty is to open up the route, but these are a piece of cake for country Z, not to mention any difficulty.

Nowadays, the underground railways are more complicated than the surface railways, and there are basically several under each town, even in villages.

"It's pretty close." The underground railway that Zhang Xu observed is next to him, this is a privately contracted railway, but it was only abandoned after completing a distance, it may be an engineering design problem, or it may be a shortage of funds, what reason Zhang Xu has no way to know, but the railway has been abandoned for more than 20 years is an indisputable fact.

Pushed the alloy plate at the entrance, the noisy zombies crowded overhead, and it was not easy to open a few tons of strength, because once it was loosened, those zombies would be crazy and restless, squeezing their heads and tearing the alloy plate on the ground, Zhang Xu would definitely be bitten a few times when he rushed up now, although he would not be infected, but he would not want to be intimate with them at zero distance.

The builders of this police station are not locals, and they don't know that the subway that was opened more than 20 years ago is right next to their foundations.

This railway is only a dozen meters away from the ammunition depot, if ordinary people even know about it, they can't break through this solid wall, but it's a pity who is Zhang Xu? He's an evolutionary!

Some people ask, why not use endothermic integrated explosives? Zhang Xu has been blown into a phobia, and he is not sure that he can resist at such a close distance, and the outcome may be either death or injury.

……

"Well, it's time to get to work!" After sitting cross-legged for more than two hours, Zhang Xu stood up and moved his muscles and bones, patted the dust on his body, his wounds had healed, and he had eaten to replenish some physical strength, and he had recovered most of the time.

As soon as he finished speaking, the bone sword in his arm immediately popped out, and the hardness of Zhang Xu's bone sword had surpassed the cement on all sides, and it was very easy to pierce into it and cut a hole.

The ammunition depot itself is not very costly, plus it is very hidden, and the builders did not use high-end materials.

Soon broke a distance of a few meters, and the more he went to the back, the more dirt it was, which was more convenient, but when he dug a distance of one meter from the tunnel, Zhang Xu stopped.

Further forward is the tunnel, Zhang Xu must be ready for battle to prevent sudden danger, God knows if there are any creatures in it, in case of repeated mutation into high-level mutant creatures, in the current state, Zhang Xu will be cool.

The red pupils in the killing state passed through a crack in front of him, and his vision was dark, the ammunition depot was already pitch black, and there was no light from the outside world at all, and the five fingers in the tunnel could not be seen.

I didn't see any general heat source from the gap, which means that there is not much danger, the temperature inside is much colder than the outside, the terrain is equal to chicken ribs, and there is no other exit at the moment, Zhang Xu took a deep breath, and then broke the tunnel wall in front of him lightly, and there was no big noise.

As soon as I entered, a cool breeze came mixed with a faint smell of blood, but Zhang Xu was already covered with bloodstains, the smell was even stronger, and he couldn't distinguish it, the damp tunnel condensed the dust into mud, clinging to the wall, and he stopped by the side of the road, and glanced at it, the ground in the middle of the road was nearly 10cm, Zhang Xu didn't want to step in, unfolded the holographic map, and emitted a fire-like blue light in the dark tunnel.

"It's almost time to get to the exit." Zhang Xu took back the map, the tunnel was 300 meters long, and the relationship that was not lit in the distance had been sprinkled on the ground, and it could reach the ground by walking a few more steps.

"Click~" A crisp cracking sound continued to extend in the silent tunnel, Zhang Xu stepped on this foreign object because it was too dark, and left without worrying about what it was, thinking it was a dry branch, but he forgot how there were branches in the tunnel? It was a dark red rib.

……

Near the exit, at the top of the deepest part of the tunnel, a black shadow hung upside down, echoing to its keen ears, and it suddenly opened its eyes, flapped its wings, and lifted up the broken bones on the ground.

Before the end of the world, it was an ordinary bat that flew in and out of this tunnel every night, catching moths from the outside to raise its offspring, it was a friendly creature in the eyes of people, pests had nowhere to hide under its positioning, and during the day it liked to snuggle up with its children, squinting and enjoying daydreaming.

In winter, it was supposed to shrink into the deepest part of the tunnel to escape the cold, but in recent years, human pesticides have drastically reduced the pests, and hunger has caused the mother bat to fly out again, and the cold wind has hit it, and the frozen wings have caused it to fall on the snow, and it is dying and forgotten by the merciless snow.

The virus mixed with the snow melted into its body, and gradually its body became huge, its vitality gradually grew, and it returned to the tunnel, and the bloodthirsty cells controlled its brain, although it was not a vampire bat, the virus activated the eternal genome in its body, awakened the sleeping blood-sucking ability, and from then on it began to kill in the surrounding places.

……

"Huh?" Zhang Xu first felt that the airflow around him was abnormal, staring at the sky behind him, with the help of the killing state and heat induction, the red dots in the retina gradually enlarged!

In the blink of an eye, a black shadow swooped down, swept across the ground at an extremely fast speed, and stretched out its slender claws, this is the regular hunting method of most air predators, originally this attack method was very popular, but unfortunately for Zhang Xu, there was no threat at all!

Zhang Xu jumped about a meter later, the hurricane was like a steel knife, after slashing beside him, he felt a little pain on his face, Zhang Xu fixed his eyes, and in a very short distance, Zhang Xu saw clearly the target of attacking him - a mutant bat.

The mutated bat is no longer the size of the original palm, its wingspan is nearly 3 meters or so, which is already very small compared to other mutated creatures, the jet-black streamer body fanned the transparent bone wings, and the spine was covered with sharp cones that stretched to the head, the canine teeth protruded, and the apple-sized eyeballs glanced at Zhang Xu beside him, and disappeared into the distance in an arc, but it would definitely not let go of Zhang Xu.

Most people think that bats can fly and are birds, but it is a mammal, like humans, so it is also a homeothermic animal, in this dark environment can rely on heat sensing to observe and counterattack, this is good news, the bad news is that its genetic unlock level is 8.53Lv, a decent level, the current terrain limits its mobility, this is a chance to get its Hope Crystal.

The red dot in his eyes quickly became larger, from turning to attacking in just a moment, the mutant bat already knew the strength of its prey, so it also launched the most rapid attack, Zhang Xu did not hold it up, and directly turned on the strongest ability - Python Change!

The manic factor in the body is pushed by the blood vessels, surging blood is transported under the dilated blood vessels, the strong muscles suddenly erupt, and the scale armor is stacked layer by layer from the inside to the outside, forming a dense protection.

Lacquer armor possessed, under the blessing of the python change, the inky black lacquer armor is no longer the original gray-black, as white and flawless as crystal, quickly oozing, covering the scale armor on the surface, the whole person seems to have fallen into transparent glue, after weathering and drying, the whole person has become glass-like smooth and translucent.

Zhang Xu didn't move, but the bone swords on both sides of his arms were quietly displayed, the black and shiny bone swords glowed with a green luster, and it was easy to escape, but now he had to hunt it in turn.

Not to be outdone, the 6 cone-like blood hes spread out, like a spider attacking at any time, surrounded by quaint cyan lines.

Rushing towards the mutant bat at the same time, the speed between the two is extremely fast, plus the relative speed, neither of them can react, but Zhang Xu has a killing state, which can slow down the speed of the speed retina to receive the image, so that he can only see the outline of the mutant bat vaguely.

And mutant bats also have a corresponding means - ultrasound, ultrasound is a kind of sound wave with a frequency higher than 20,000 Hz, it has good directionality, and can be quickly reflected when encountering objects, so as to achieve the function of positioning, even bats that have lost their eyes can use the function of ultrasound to capture prey.

The mutant bat came sideways, it tightened its wings to reach a smaller area to reduce air resistance, and Zhang Xu's whole person was like a dark green poisonous arrow, pointing at the throat of the enemy!

In an instant, a brilliant flash of fire flashed in the silent tunnel, followed by the sound of the two colliding, and the piercing sound of friction echoed throughout the tunnel.

Zhang Xu has observed the bat's claws, which are extremely sharp, but not enough to break through his scale armor and lacquer armor, and boast that he can resist it, but he didn't expect to underestimate the ultrasound of this mutated bat, because the vibration frequency is similar to his own outer armor, so Zhang Xu's lacquer armor and scale armor are shattered from the inside out, so that they do not play a protective role at all.

It felt like its chest was paper-paste, and its claws were only a few centimeters away from its heart, which was already extremely dangerous, but in exchange for the serious injury of the mutant bat, it was pierced by 2 blood sticks, and green blood flew out of its body, but it did not destroy its wings, allowing it to escape.

The half-flying and half-stopped mutant bat buckled the cement on the top, staring at Zhang Xu from a distance, his eyes were full of anger and jealousy, the dark green blood beads fell on the fluff, and the mutant bat's mouth opened slightly, aiming at Zhang Xu in the distance, this extremely small action Zhang Xu did not pay attention to, after all, the heat induction can only see the general outline!

At this moment, Zhang Xu's brows tightened, and a strong dizziness dared to come to his heart, the whole person seemed to be spinning, and then he vomited a mouthful of blood, and the whole person was hit like never before, this mutant bat found the amplitude frequency of the human body, Zhang Xu's internal organs were all shattered in an instant, and Xuehe quickly swam in the body, repairing everything in obscurity!