This room is different from the other rooms outside, just looking at the structure and material of the door, there are many dried bloody handprints on the door, which adds a touch of mystery and tension to this room.

Chen Fei and the others had all explored, but they didn't find the mutant female zombie, it couldn't just disappear out of thin air, so it must be in this room!

Li Yunfei nodded at Chen Fei, exchanged glances and changed into the form of a rock man again, and after he entered the sensing area at the door, the alloy door automatically opened.

After entering this room, they saw everything inside, and the two of them were stunned by the scene in front of them, this room was densely packed with metal operating tables, and the ground was covered with hideous bloodstains.

Lying on the operating table were some dismembered zombies, their limbs were fixed by metal rings, and after Chen Fei and the others entered this room, they smelled the breath of the living, and these zombies were extremely excited, struggling hard.

Chen Fei roughly calculated, I am afraid that there are a hundred operating tables in this room, thinking that when the zombie virus is still in the incubation stage when it spreads to the world, the people of Ortron Biopharmaceutical have already discovered the extraordinary nature of this virus, and look for some people who have not been infected by the virus in advance to do research here.

Once the vaccine is successfully launched, Ortron will be able to stand at the top of the global biopharmaceutical circle and become a top biopharmaceutical company with this vaccine, which is why they will spend a lot of money to build the first laboratory in China.

Imagine the scene of hundreds of researchers doing experiments and pathological analysis together, which can no longer be described as spectacular, but can only be described as fanatical and terrifying!

Li Yunfei looked at all this in the room, and didn't know what to say for a while, as if something was stuck in his throat.

Chen Fei patted Li Yunfei on the shoulder and took the lead in speaking:

"Be careful, that mutated zombie is in this room, it's very cunning, if it runs out, it's dangerous for others!"

"Good! Then I'll guard the door! ”

After Li Yunfei finished speaking, he turned around and walked in the direction of the door, the rocks in his arms changed into a new state under his control, and they were more than twice as thick, and he stood at the door as if it were a safety door.

Tut-tut...... The ability is really good!

Chen Fei was amazed in his heart, and as soon as he mentioned his ability, he remembered the first bloodline of the universe that made him sad!!

Why don't you have a random ability?

Random of the most cheating bloodlines, the result only played an auxiliary role, thinking of these Chen Fei's painful mouth twitched, looking like the very 6 plus 7 Wu Lao Er next door.

The innermost operating tables were covered with bloody white cloths, Chen Fei used a spear to pick up those white cloths all the way, on the surface, he was checking one by one, but in fact, his eyes had already locked on the operating table directly in front of him and he was separated by three operating tables, according to the prompts at the end of the intelligent voice system, the mutant zombie was in that position.

Chen Fei showed great patience and did not rush over in a hurry, he was surprised in his heart that this mutant female zombie also had such a high level of intelligence.

The most fatal weakness of zombies is that they have lost all their intelligence, and they are not even as good as some beasts, they only know how to blindly chase the fresh breath of life around them, but now Chen Fei found that the brains of zombies are recovering little by little, not only mutated zombies, but even some ordinary zombies have also recovered some of their ability to think.

This is even worse news for the surviving humans, the number of zombies and the near-infinite physical strength, if there is some ability to think, the human race will only struggle more and more in the battle with them.

Now some members of the evolutionary team can fight seven or eight zombies with their own ample combat experience, and even those with inferior combat skills can fight four or five zombies alone.

But if these zombies regain some of their ability to think, the zombies will establish a connection with each other, and gradually form a cooperation! At that time, they may only need three of them to successfully contain a member of the evolutionary team, relying on their physical strength.

Thinking of the situation he would face in the future, Chen Fei sighed lightly, and then his eyes suddenly turned cold, and the spear in his hand stabbed straight at the operating table where the mutant female zombie was lying without warning. Miao

Even Li Yunfei didn't expect Chen Fei to burst out, and the black spear stabbed out and directly pierced one of the thighs of the mutant zombie.

The mutant zombie let out a low roar, its razor-sharp nails slicing at the shaft of the spear, and there was a sharp and piercing grinding sound.

However, the spear in Chen Fei's hand did not have any damage at all, except for some more scratches.

"Roll !!"

Chen Fei shouted loudly and threw the mutant female zombie against the wall inside, making a dull crashing sound.

The mutant female zombie seemed to instinctively sense danger, and after breaking away from the spear, it sprang up from the ground, like a nimble monkey running in the direction of the doorway.

However, Li Yunfei, who had been waiting at the door for a long time, stood there like a mountain, and the mutant female zombie wanted to escape from the gap above Li Yunfei's head, but was hit by Li Yun's rock punch and flew back.

The next battle was the result of no suspense, and the mutant female zombie was easily pierced through the head by Chen Fei with the spear in his hand within a few rounds, and her body fell to the ground weakly.

"We need to speed things up, it's only taken us so long to find the fourth basement floor, and there are still six floors below, and the longer we hold it, the more dangerous it will be for the people on it!"

Li Yunfei also realized this, nodded and quickly left with Chen Fei but the others rounded.

In the fifth and sixth underground floors, everyone still found nothing, from the layout to the zombies inside, they were basically similar to other floors.

Chen Fei made a rough estimate, not counting the infected people who were infected and regarded as research subjects, there are probably thousands of employees of Altron Biopharma alone!

Looking at it this way, it seems that they have a lot of confidence and determination in the research of zombie viruses from the beginning, so they will invest so much manpower and financial resources, once they succeed, they are bound to become the world's top biopharmaceutical companies, money, fame, status, whatever they want!

Chen Fei asked himself, if it were him, maybe he would have such ambitions, but these people still underestimated the danger and horror of the zombie virus.

However, if they had an Evolution Beast at the time, they might have been able to research a vaccine and a serum that could fight the zombie virus.

Thinking of the evolution beast Chen Fei's expression became uncertain, judging from the display of the zombie radar, there is indeed an evolution beast underground, if there are survivors alive, it is very likely that they have achieved more significant results!

Soon, Chen Fei's thoughts had to be forcibly interrupted, and they encountered unprecedented dangers in the first six layers of the seven underground floors.

The space on the seven basement floors is much higher than the upper floors, and each room contains the carcass and specimens of an animal, tigers, elephants, giraffes, crocodiles, lions, ......

It was the gathering of these animals that led to Chen Fei's predicament at the moment, because the zombies they had to face were not humans, but a group of animal zombies composed entirely of animal zombies.

Some of these animals rely on their huge size, some rely on agile speed, and what is even more troublesome is that there are several relatively large bird zombies in it, and their attacks in the air are even more unguardable!

Three of the soldiers were injured by these zombie birds, although the temporary impact was not great, but these soldiers knew that they could not escape the fate of becoming zombies in the end!

Chen Fei comforted the three soldiers at the right time, and told the soldiers that he guessed that the vaccine serum against the zombie virus should have been developed here, which did have a slight comforting effect, but whether there is a vaccine serum or not, you must first find the most advanced equipment!

After experiencing the battle between the seven underground floors and the animal zombies, there are not many bullets left on their bodies, if they want to continue to maintain this combat method, I am afraid they can only hold on to two more layers, and when they reach the tenth floor, it is estimated that they will only have to fight with bayonets.