When he said these words, Lin Cheng himself was actually not very good in his heart, the situation on the second and third floors had obviously shown that the employees of this research institute had cleaned up all the evidence extremely carefully when they were evacuating, and in this case, what they could find was actually extremely limited, let alone find enough weighty clues.

But Lin Cheng has never been a person who gives up easily, or a guy with a very iron head, this research institute has a total of six floors, so he will never give up until he searches the corner of the last layer.

Without saying anything more, Lin Cheng glanced back at the third floor that had been searched by him and Lin Yongjian, and then walked directly to the fourth floor.

As soon as he went up to the fourth floor, Lin Cheng's brows suddenly furrowed, and an inexplicably familiar smell suddenly poured into his nose!

"It's ......"

After smelling this smell, Lin Cheng frowned and quickly recalled, and after a while, he suddenly clapped his hands vigorously and said in a deep voice: "Formalin!" ”

"Formalin?"

Because Lin Cheng's speed up the stairs was too fast, Lin Yongjian, who was pulled down dozens of meters, had just arrived at this time, and he was suddenly surprised when he heard Lin Cheng's words, "How do you know?" ”

Hearing this, Lin Cheng's face suddenly became very complicated, "Because...... I've smelled it in one place before, so I'm very impressed. ”

That's right, the place Lin Cheng was talking about was the morgue full of experimental corpses that he had inadvertently broken into in Building No. 1 of the Liancheng Security Zone, and it was from that time that Lin Cheng developed an extremely disgusted attitude towards all research institutes and the like, and he almost never entered them unless necessary.

"I see......"

Seeing that Lin Cheng casually explained without going into details, Lin Yongjian was also very discerning and didn't ask much, raised his eyes and scanned the situation on the fourth floor and said, "So it seems that this floor should be the floor used to park the corpses......"

"That's right, but let's not look for them separately from this level, I have a hunch that this layer is not the same as the three layers below."

Nodding, Lin Cheng waved his hand, and after dissipating the pungent smell of the potion, he took Lin Yongjian and Coke and walked to a room in front of him.

Walking to the door, Lin Cheng habitually twisted the doorknob, but suddenly felt a sinking in his hand, and found that the metal door was actually locked!

"Interesting!"

After finding that the door was locked, Lin Cheng couldn't help but curl the corners of his mouth, he searched from the beginning to the end on the three floors below and didn't encounter a locked door, obviously when those staff evacuated, although it was not urgent, they didn't have the time to deliberately lock the door again, but the metal door in front of him was specially locked, which was obviously a big problem!

"Whew-"

Letting Lin Yongjian and Coke take two steps back, Lin Cheng pulled out the long sword again, aimed at the position of the doorknob and stabbed hard, and saw that the long sword pierced into it without any hindrance like cutting tofu!

Then, he cut a semicircle along the piercing position, and the lock of the metal door was easily broken by Lin Cheng.

Gently pushing open the broken door, Lin Cheng did not rush in, but first squinted his eyes and carefully scanned the situation in the house, and found that there was no other abnormality except for the unusually dim light, so he waved behind him and motioned for them to go in with him.

"Click......"

After walking into the house, Lin Cheng saw that the light was too dim, so he could only take out his flashlight and turn it on, and glanced around at the corners of the house.

Under the light of the flashlight, the situation in this room finally caught the eyes of several people.

The area of this fully enclosed room is not too large, about 100 square meters, there are a few morgue beds scattered in the room, and there is a row of test benches on the side of the wall at the end, and the instruments on the test bench have already fallen to the ground and broken.

But none of this mattered, because he had already found in the scans just now that on both sides of the left and right walls, there were still pull-out metal morgue beds, and even some of the morgues were still sticking out, obviously there were corpses that should have been stored on these extended-out beds before, but they had already been taken away by those staff.

"Shhhh

After seeing the situation in the house, Lin Yongjian, who saw the morgue for the first time, couldn't help but stand on end, even though he had seen countless terrible zombie eaters in the past six months, but the unknown fear of ghosts in humans still could not be erased.

"Look at your virtue!"

Hearing the gasp from beside him, Lin Cheng couldn't help but glance at him, "Even if there are really dead people here, at most, they will become the lowest-level zombies, and low-level zombies are a threat to you?" ”

After that, he stopped talking nonsense with him, and walked directly to the morgue closest to him on the left.

"Bell ——!"

Before Lin Cheng could walk to the morgue, an unusually terrifying sound of metal colliding in this dead room suddenly came from a closed morgue behind him!