After Chen Guohao's setting, the two search and rescue drones flew slowly around the hospital building unhurriedly, pausing when flying over every floor and every window, but the thermal imager is not omnipotent after all, and there is no way to penetrate too thick walls, unless the living corpse is just against the wall or that window, otherwise the picture is just dark, and the captain of the wolves, who had just entered the hospital, was facing the wall in front of him at this time, thinking about how to search for this hospital.

Zhou Zhiyuan, who was sitting on the registered windowsill, whispered into the earphones: "Green wolf, stone wolf, be careful, the isolation doors of this hospital have all been lowered to block the living corpses, and now there is no way to restore the power, and those outside can't get in and out, I see from the hall that the whole hospital is divided into four parts, one of us is responsible for a block, and the rest I called Luo Luo to call a few giant wolves to search."

Xie Dongcheng replied: "The green wolf received, the back door is the entrance to the inpatient department, I look at the thermal imaging picture of the drone, there is no shadow of any possible living corpse is locked in the ward or hiding in the ward, the first floor is used as an administrative office, there is nothing abnormal, I am now going to the upstairs ward area to search"

After dozens of seconds, Zhou Zhiyuan asked suspiciously, "Stone wolf?" What's going on over there?"

Suddenly, Zhang Hongda's high-decibel voice came out of the earphones: "Stone wolf, your kick is so handsome, that little nurse who crawled on the corpse flew out and smashed his head directly on the wall!"

Liu Jianyu said: "Wild wolves, you should pay attention to the survivors, don't always stare at our camera frames"

Zhou Zhiyuan asked, "Stone wolf, what happened?"

Liu Jianyu replied: "There are several rooms for instrument inspection not far from the emergency room, I originally wanted to see the situation of the equipment inside, who knows who opened the first door and was attacked by a crawling corpse, at that time she was on the ceiling above the door, she should have heard the sound of me turning the doorknob before moving to that position"

Zhou Zhiyuan said solemnly: "The reptile corpse you met is a little different, usually when you turn the doorknob, they will pounce as soon as they hear the sound, how can they wait until you open the door to attack you with this method similar to a sneak attack?"

Liu Jianyu replied: "The picture just now is that I pushed the door open and stepped on one foot to enter, and after the creeping corpse fell from above to attack me, I took a big step back and kicked it against the wall."

Zhang Hongda said: "Squatting, sneak attack, knocking on the stick, why is this little girl's tricks so inferior?" Or has its kind become like that?"

Xie Dongcheng said: "Even this kind of ambush technique can be used, it seems that their habits have an invisible memory of human movement habits, I don't know if this change is naturally formed or what creatures they have eaten."

Zhou Zhiyuan said: "If the crawling corpses become like this, you need to use the individual phased array search radar that the military exhibited and developed not long ago, that thing can detect the biological body movements behind the cement wall, but the search distance is very short and it takes two people to operate, remember to remind me to ask for 2 groups of that system before the next mission."

Chen Guohao said: "I have already sent the fish pond and the picture and related information back to the base through satellite signals, but they are now preparing to relocate, and I don't know if the expatriate troops will have time to react."

Zhou Zhiyuan said: "It's good to do what you should do, they are soldiers and they are very unusual soldiers, after the baptism of this era, the change of the living corpse is more important to them than anything else, rest assured, our information will be given priority, and we never use satellite signals to send worthless things"

Zhou Zhiyuan, who jumped off the registered windowsill, moved the assault rifle to his back and tightened the strap of the tactical gun, then assembled the spear and put it behind his back, holding an ice axe in his left and right hands and continuing to move upstairs.

Zhou Zhiyuan flew out with one kick of the oncoming female living corpse, and several of its colleagues fell to the ground and slid backwards for a distance under the action of great force, and Zhou Zhiyuan jumped up to the left at the moment when his foot was just withdrawn, and raised the ice axe in his hand to cut at the reptile corpse that also pounced on him, without waiting for the head of the 2 reptile on that side to hit the ground, Zhou Zhiyuan threw the 2 ice axes in his hand towards the head of the reptile corpse on the right, and as soon as the ice axe left his hand, he immediately took out a pistol and fired several shots in the direction of the nursing station.

The whole battle process only took a very short time, Zhou Zhiyuan took out his ice axe from the corpse and wiped the clothes on its body, and then he walked to the diagnosis and treatment room and the dispensing room to check the equipment and medicine inside.

"Green wolf, stone wolf, how are you doing? I was on the second floor and was attacked by a mixture of 8 living corpses and crawling corpses, and it seems that they have also learned to attack each other in a basic way!"

Zhou Zhiyuan said slowly

"The green wolf reported that I encountered the use of instruments to attack me in the ward area, some of them grabbed the drip rod as soon as they saw me in a patient gown and waved it, or the doctor held the electric shock module and stethoscope in his two hands and waved there, and there were also crawling corpses on the ceiling of the wheelchair and hospital bed, which is really incredible!"

Xie Dongcheng said

"The situation here is basically the same as that encountered by the green wolf, except that the area I walk often encounters are cleaning personnel, and the tools they use to attack people after their corpses are mops, brooms, carts, buckets, etc."

Liu Jianyu said in a strange tone

"Keep searching, I feel that the living corpses here in the hospital must have changed even if they weren't led away by the sound of artillery, so that they have strengthened their sensory discrimination to a certain extent, I can't say what it is."

Zhou Zhiyuan's tone sounded like a thoughtful feeling, and the other teammates also fell into a thinking mood after listening to what he said about the changes in the living corpse, but except for Xie Dongcheng, who has a foundation in medicine and anthropology, can still come up with a clue, the others can't think of a reason.

"I guess old wolf, you mean that the living corpses in this hospital can tell from their voices what is edible and what is not, right? That is, they can tell whether the sound is produced by the movement of living beings, or they have read from their memories that the sound of the shelling is life-threatening to them, which is very different from the previous living corpses that only had the instinct to eat, that is, the manifestation of intelligence."

Xie Dongcheng said worriedly

"But their changes don't seem to happen through learning, as if they change naturally when time comes, and human beings know too little about them, and the pace of management to build a scientific research team must be accelerated."

Zhou Zhiyuan said in a deep voice