The walls and ceilings around the institute are made of reinforced concrete, which is extremely hard. The ground was also covered with a thick layer of steel plates.

The doors to the front rooms are all made of alloy steel, and they are extremely hard.

The gate was not locked.

Qin Fei and Xie Nanai entered the room.

In this, Qin Fei did not find the existence of zombies. However, in the center of the room, Qin Fei saw a rectangular cultivated land about two square meters in size.

There are also six corn plants planted on the farmland.

Xie Nanai stepped forward and picked a corn cob and came down.

"This doesn't seem to be ordinary corn...."

Not ordinary corn?

Qin Fei also went up and picked off a corn cob and put it in the system backpack.

[Super Ear of Corn: Ear of Corn mutant, it looks like it should be safe to use.] This corn can also be used to make glue. 】

Is this super corn?

Qin Fei was a little surprised.

Super Corn is a hidden item in the Seven Days Kill game, a super crop cultivated by an underground laboratory in the Navigan region.

Because it is hidden in an underground research institute, it is generally difficult for players to find out.

This kind of super corn cob, ordinary people only need to eat one a day, which can basically meet the calories consumed in a day.

But why was this thing found here?

It shouldn't be under some woodland farm, right?

Forget it, no matter what, put this corn away first.

This kind of super corn will definitely not help to defend against tonight's corpse tide.

But if you can survive this corpse tide, you will definitely be able to come in handy in the next world. After all, food is a very important resource in any world.

Once you walk out of the lab, you will find a staircase that goes straight down.

Through the light of the flashlight, Qin Fei saw that there were corpses and bones of some dead people everywhere on this staircase and on the ground below.

The corpses seemed to have been gnawed by something, almost all of them were missing arms and legs, and none of them were intact.

Looking at these corpses, Qin Fei couldn't help but feel a little furious in his heart....

He had a sense of foreboding.

After Qin Fei pulled the safety bolt of the shotgun open, the uneasiness in his heart was slightly better.

When Qin Fei and Xie Nanai walked to the bottom of the stairs, a fat pig covered with green hair suddenly rushed out of the shadows.

'Bang! ’

Qin Fei was scared half to death by this green-skinned pig.

He subconsciously fired several shots with the troll in his hand.

Subsequently, Xie Nanai, who was beside Qin Fei, also reacted immediately, and after Qin Fei's bullet was empty, he hurriedly raised the troll and went up.

This fat pig has a very strong vitality.

It wasn't until Xenaina emptied all the bullets in the shotgun that the green-skinned pig was completely killed by the two of them.

The green color of this pig is not the same as that of a green-skinned zombie with a green glow on the surface of its skin.

The greenish color of its body seems to be caused by something like mold growing all over its body.

Far away, Qin Fei could smell the musty smell emanating from the surface of the pig's skin.

Stinky to stinky.

In line with the principle of never wasting it, Qin Fei endured his nausea, stepped forward and cut a piece of meat with a knife.

Super Pork: Pork cut from the body of an ordinary domestic pig that has undergone a mutation. The pork is covered with mold and can be used to make antibiotics. 】

This pig has mold on its body.... Then these pork must be inedible.

Qin Fei then walked into the room on the next floor.

This floor seems to be a lounge for living, and in addition to some clothing, there are some dormant zombies lying inside.

But there were no mutants in it, so they were quickly killed by Qin Fei and the others with trolls.

Continuing down, there is a square room made of pure steel.... There is also a steel vault door in the house.

Walking to the door, countless yellow spots suddenly appeared in front of Qin Fei's eyes.

The yellow dots are dense, and there are at least ten or more zombies hidden in it.

Qin Fei tied the wire to the gate and took out the iron pipe bomb at the same time.

After making these preparations, he opened the steel door.

In an instant, inside this room, more than a dozen zombies with flames came out! It's terrifying to look at. But because of the wire, these zombies were blocked for a moment.

Since it's not yet night, these zombies don't run.

After Qin Fei ignited the iron pipe bombs in his hand, he threw them out directly, killing them.

Continuing down, you're at the bottom of the institute.

There is a very large laboratory inside.

Outside the laboratory, there are several gasoline barrels with a lot of gasoline inside.

The walls of this laboratory are also made of reinforced concrete.

But in addition to the concrete walls, there are several pieces of glass on the walls of this lab. The surface of the glass was more or less cracked, but it didn't break.

can withstand the attack of zombies, it seems that it should be bulletproof glass.

Through these bulletproof glasses, Qin Fei could still see some zombies lying inside.... Among these zombies, there are even military fats and green skins.

Qin Fei opened the steel door of the laboratory.

The sound of the door opening instantly alarmed the zombies in the laboratory.

Since the green-skinned zombies are also able to run during the day, they are the first to rush out.

Qin Fei and Xie Nanai's ammunition was very sufficient, and under the combined fire of the two, they directly killed the green-skinned zombie in seconds.

The remaining zombies couldn't run because it wasn't night, and naturally they weren't the opponents of Qin Fei and the others.

After cleaning up the zombies in this laboratory, it was already ten o'clock in the evening.

[Judgment Day has arrived, survive the last wave of corpses to complete the mission!] Countdown to the return of the mission: 7 hours and 58 minutes! 】

The current location of Qin Fei and Xie Nanai is the deepest part of this underground research institute.

After the zombies in the Seven Days Kill find out the location of the survivors, even if you are hiding underground, they can still dig you out with their hands.

No matter how deep you are in the ground, it only depends on the length of time.

So, zombies will definitely dig up from the ground in the end.

But Qin Fei estimated that these zombies would not be able to attack here for a while, so it would definitely not work for him to hide here all the time and not do anything.

He walked out with his shotgun in his hand.

Qin Fei planned to go to the top floor of the research institute first to defend himself.

When you can't hold it anymore, you can continue to retreat to the rear.

Make sure you can spend as much time as possible in each room.

Only by doing so can we maximize the chances of Qin Fei and Xie Nanai surviving in this corpse tide.

Taking advantage of this time, Qin Fei took some gasoline from the gasoline barrel below and brought it up, and sprinkled it evenly on the ground....

Midnight, 12 o'clock in the morning.

[Countdown to the return of the mission: 6 hours 0 minutes]

At this time, from above Qin Fei's head, the low roars of countless zombies could already be heard.

The concrete block on the top, under the continuous excavation of these zombies, has also begun to slowly fall off.

Here they are!