As the zombies outside continued to attack, cracks had appeared in the walls of the laboratory.

Qin Fei thought of a very crucial point at this time.

"No... We could indeed escape to the ground through the ladder of the toilet!"

He analyzed: "Judging from the previous corpse tides, the number of new mutants that appear for the first time in each corpse tide will not exceed three. In other words, after we go to the earth, there will be no new corpse kings! ”

When Xie Nanai heard this, he also reacted immediately.

"It seems like that...!"

Whether it's green-skinned zombies, military fat, or self-exploding zombie soldiers, when they first appear, their numbers are almost always three or less....

No, if according to Qin Fei's statement, there are only two corpse kings here, so there should be one that hasn't come out....

"What if a third corpse king suddenly appears after escaping to the surface?"

Xie Nanai immediately asked.

"Impossible," Qin Fei immediately denied, "According to the law of the previous corpse tide... Only ordinary zombies will exist for different time periods.

As for the zombie mutants, they will only come out three or more in one go during a certain period of time during the Blood Moon.

These variants do not appear in different time periods. Therefore, the corpse king that has appeared underground will definitely not be encountered on the ground. ”

Qin Fei's inference is not nonsense.

Whether it is military fat, fat zombies, or green-skinned zombies, almost all of them appear at some point in time during the blood moon.

It is impossible to attack the survivors in two waves.

Therefore, the third corpse king should have appeared a long time ago, but it may have been trapped in another position for some reason.

Now that such a long time has passed, at the speed of the corpse king's excavation, the third corpse king is likely to be somewhere underground, and is digging towards Qin Fei and Xie Nanai....

That's why Qin Fei said that it was impossible for them to meet the Corpse King on the ground.

Green-skinned zombies and military fat are the same thing.

On the ground now, in addition to ordinary zombies, there will only be zombie dogs at most.

But with the shotguns in the hands of Qin Fei and Xie Nanai, they could kill these zombie dogs almost instantly.

Therefore, the two of them only need to run with those ordinary zombies all the time, and then hold on until six o'clock in the morning, and the mission will be successfully completed.

Although these mutant zombies in the research institute can easily dig through the ground and walls, chasing and killing Qin Fei and the others all the way to the depths of the ground, they can't go up.

Zombies can't fly.

As long as Qin Fei and Xie Nanai climbed to the ground along the ladder of the secret passage and then destroyed the metal ladder, those zombies would be trapped underground all the time.

The solution is feasible.

Qin Fei informed Xie Nanai of his conjecture.

The two then climbed up to the ground along a metal ladder.

In fact, using this method to trap those zombies is only one chance, and it must be used in the later stage.

After all, without going through several waves of corpses, the survivors will not be able to figure out the pattern of zombie attacks at all. Plus an underground research institute like this one, and it's just that in the Navigan region.

Therefore, using this method to avoid the tide of corpses can only be used in this last wave of blood moons, and cannot be replicated.

Since Qin Fei was worried that their presence would attract the zombies to the location of the exit of the secret passage, he and Xie Nanai climbed very quickly.

After coming to the ground, Qin Fei immediately took out the hacksaw and sawed off the metal ladder.

The exit to this secret passage is still in the snowy mountains.

It's the middle of the night, and it's still a little cold. In the sky, the eerie purple moon still hangs.

After the two of them came to the ground, it was only about ten minutes before dozens of zombies poured out from around them.

Luckily, there are no mutants among these zombies.

The worries in Qin Fei's heart were finally dispelled, and it seemed that his conjecture was not wrong.

He and Xie Nanai began to run frantically in the snow.

Drinks that can increase the speed of endurance recovery, although the two of them don't have a lot of stock, but they still have some, and if they keep running like this, they will have no problem holding on until dawn.

During the run, if there were zombie dogs chasing after them, Qin Fei and Xie Nanai would directly accelerate and distance themselves from the zombies behind them.

After getting rid of the zombies they were chasing, they turned around and used the trolls in their hands to directly eliminate the zombie dogs behind them.

Without the pursuit of the zombie dogs, they continued to run forward.

The zombies in the zombie tide can't be killed.

But as long as it lasts until six o'clock in the morning, the blood moon will end.

So just take out the zombie dogs that are too fast. As for the ordinary zombies, they just rely on running speed and drinks such as coffee to drag on time.

On the morning of the fiftieth day, at six o'clock sharp.

With the end of the last Blood Moon, including the zombies behind Qin Fei, everything around gradually came to a standstill.

[You have completed the mission: Survive in the Seven Days Kill game world for 50 days!] 】

[You have obtained Task Reward 1: Substitute Death Doll X1.Real-world cash reward X1,000,000 yuan, which has been distributed to your real-world account!] 】

[Reward 2: Return to the real world!] 】

[Mission completed, return begins, teleportation countdown....]

When the system's prompt appeared, all objects in the entire world began to be gradually replaced by a burst of white light.

It's coming back....

Qin Fei glanced at Xie Nanai beside him, raised his right hand and made a thumbs-up gesture....

"Goodbye! ... Take care! ”

"You too, goodbye!"

A smile appeared at the corner of Xie Nana's mouth, and she also replied with the same gesture.

As the white light became more and more intense, Qin Fei couldn't even open his eyes until the end....

After a while, when the white light disappeared, Qin Fei opened his eyes again. By this time, he had returned to the living room of his home before he crossed over.

Now Qin Fei is not the first time to complete the crossing mission.

He turned on his phone with ease. After checking it, Qin Fei found that there was another million extra cash in the card on the SMS prompt.

[The newbie quest world has been completed, and you have been officially qualified for the game!] 】

[You can choose to forfeit the game and no longer cross. Or move on to the next survival game...]

According to the system's prompts, Qin Fei now only needs to give up the game, and he doesn't have to risk crossing anymore.

Together with the last reward, he got a total of two million in cash. As long as Qin Fei gives up the game, these two million can completely improve his life and make him live quite well in the real world.

But Qin Fei wants much more than that....

"I choose to continue!"

[You have chosen to continue the game.... Diamond-shaped crystal ..... being implanted】

The system's dialog box reappears.

At the same time, a diamond-shaped blue light appeared on his left wrist.

After a moment, the light was gone.

On Qin Fei's left hand, there was already an extra blue diamond-shaped crystal.

[Sample implant mosaic completed...]

[Hello, survivors, welcome to the sandbox survival game from scratch!] 】

(End of 7-day killing)