On the second day, Shen Jin, Shen Yu, Song Ci, Chen Hao and others set off.Standing on the wide city tower, Chu Lian watched the pioneers drifting away, feeling flustered for no reason.

Zhang Feng patted Chu Lian on the shoulder, "Don't worry, they will come back safely. The stormy ones have passed, and those without any reason will be planted in the small gutter."

Chu Lian didn't answer.Chu Lian is not worried about the safety of Shen Yu and his party, he is very aware of the strength of Shen Yu and others.Even if you really encounter a hard stubble, you can get out of trouble safely under the cover of the pioneer.Vaguely, Chu Lian felt that the destination of Shen Yu's trip was inextricably linked with him.

The construction of the base is still proceeding in an orderly manner. In the laboratory, Qi Rui and other researchers are also repeatedly researching primary vaccines day and night, trying to overcome difficulties as soon as possible and find a way to develop advanced vaccines.

Shen Yu and others did not return after two months.Zhang Feng was not in a hurry at first, but after Shen Yu and his party left for more than three months, Zhang Feng also started to worry.

Before each trip, Shen Yu and others will make accurate calculations and roughly estimate the return date within a range.Even if there are occasional delays on the road, this time period will not exceed half a month.But now, it has been three months since Shen Yu left.

Chu Lian couldn't sit still for a long time, his expression was a little confused, "What if something happens to Xiaoyu and the others..."

Zhang Feng interrupted him with a frown, "No, the destination is too dangerous, and the people traveling this time are all high-level supernatural beings, so it's okay for such a combination to break into a medium-sized base alone...they will I came back safely. Before that, what we have to do is to protect our base."

Chu Lian forced himself to suppress the worry on his face, and nodded following Zhang Feng's words, "That's right, they are so powerful, nothing will happen to them."

At this time, Shen Yu and his party, who Chu Lian said were strong and should have nothing to do, were actually in trouble.

Two months ago, Shen Yu and his party rushed to the southern dense forest that was said to be very weird.Looking down from the vanguard, there are only a few scattered zombies in the dense forest.If you don't look very carefully, you may not find it.

After the end of the world, plants are also affected and mutated.Although it didn't evolve towards scary plants like piranha-swallowing trees, the branches and leaves of the plants became more dense after the catastrophe.In the dense bushes, a few scattered zombies seem to be drawn by something, migrating to the middle of the dense forest on foot.

At first, Shen Yu and others thought that there was a power stone left in the middle of the dense forest to attract zombies, but after a few days of high-altitude observation, they quickly overturned this conclusion.

These few zombies were of the fourth or fifth rank, and they even saw two zombies of the sixth rank inside.They shuttled back and forth in the dense forest, not as if they were attracted by the power stones, but rather... as if they were surveying the terrain, or protecting something?

Puzzled, Shen Yu and others finally decided to go down to investigate in person.

But who knows, just after Shen Yu and others climbed the rope and jumped off the dense forest, the team members who stayed behind on the vanguard immediately started to warn: a large number of zombies from the outside began to approach!

As soon as it landed, the zombies outside began to approach in a hurry.Shen Yu and the others did not dare to delay, and immediately returned to the leader along the climbing rope.In the vanguard, it was clearly seen that as soon as they left the dense forest land, the tide of zombies surrounding them receded towards the outside of the dense forest like an ebb tide.

This is a strange phenomenon, but it proves that there is something ulterior in the dense forest.

Just when Shen Yu and others wanted to approach the dense forest for the second time, all the zombies strolling in the dense forest approached the vanguard.

They roared and shouted, but they didn't make a move for a long time.

Shen Yu and the others became even more curious, and tentatively attacked a fifth-order zombie, and found that except for the attacked zombie that responded, the other zombies still screamed there without responding.Taking advantage of his illness to kill him, Shen Yu and his entourage quickly eliminated the sneak attacking zombie.

After one zombie fell, the rest of the zombies seemed to react, and after a moment of silence, they finally launched a counterattack against Shen Yu and his party.

Not wanting the zombies to damage the pioneers, Shen Yu and others decided to retreat first.

After Shen Yu walked away, no one saw that among the remaining zombies, a relatively high-level sixth-level zombie quietly dug the crystal nucleus of the dead fifth-level zombie into its mouth.

In the following month, Shen Yu and others tried many ways, but none of them succeeded.However, he killed more than a dozen of the obstructing zombies.

Although the zombies were killed, the number of zombies did not decrease from the beginning to the end.

"That zombie with yellow spots on its face, is it the leader? It escaped after several times of encirclement and suppression. Can you go down and see what's going on after killing it?" Chen Hao pointed out after killing the corpse once. Said to Shen Yu with an unusually tall zombie.

Shen Yu followed Chen Hao's point and looked down. I don't know if it was an illusion. Shen Yu felt that the zombie was much stronger than when he saw it for the first time.

Wanting to agree with Chen Hao's words, he launched an attack on the zombie with yellow spots.But on the second day, that zombie did not appear in the zombie team that blocked their progress.

The whole thing was weird, and Shen Yu didn't dare to delay. After killing a few zombies blocking the way, she found that there were still zombies coming to obstruct her as usual today, so she and Shen Jin set off the leader.Ready to explore the middle of the jungle.

For three consecutive days, she didn't receive warnings from her teammates on the vanguard. When Shen Yu thought the obstruction was over, on the fourth day, she received warnings from her teammates: The wave of zombies has arrived!

The tide of zombies came suddenly and strangely. Just when Shen Yu and others wanted to return to the leader by climbing the rope, the teammate on the leader who was attached to the climbing rope was cut into two pieces by a wind blade with the smell of rotting corpses. .On the fallen corpse, the wound already exudes a rancid smell.

"It's a zombie! That sixth-order zombie! A zombie with yellow spots... No, it seems to have evolved, run away, run away!" Another teammate roared as the vanguard stepped up.Then, after a gust of wind blade, that teammate followed in the footsteps of the previous teammate while climbing the rope.

The strings in Shen Yu's mind tensed instantly.

The seventh-order zombies were born and appeared beside them!

Without time to say anything else, Shen Yu and his party rushed towards the middle of the dense forest.

The surrounding area is already covered with waves of zombies. If they break through at this time, they will definitely be dragged down by the zombies. If they are overtaken by the seventh-order zombies, none of them will survive.

The five fled quickly. Without a vaccine, no one wanted to go head-to-head with the seventh-order zombies.Now not only the claws of the seventh-order zombies, but even its abilities are poisoned with corpse poison!

"What to do? There's no place to park the vanguard! No matter if it's the zombie tide or the seventh-order zombies, if anyone catches up, we have no way to survive!" Song Ci shouted while running.

Shen Jin responded while protecting Shen Yu, "Find the tallest tree and find a way to escape to the tree!"

"What's the use! Even if you climb up a tree, you can't hide from the zombies of the seventh rank. Even if the vanguard can arrive in time, the wind blowing up is enough to blow ten of you away!" Chen Hao retorted.

Shen Jin responded loudly, "On the top of the bushes, how many meters of glacier can you lay in the shortest time?"

Chen Hao was taken aback and almost fell, but fortunately he was helped by Xing Wei, "I understand what you mean. It is estimated that the pavement can be 200 meters in the shortest time. But considering the load-bearing problem of the pioneer, the fastest can only be 100 meters! "

Shen Jin heard this and asked with a smile, "Do you dare to bet?"

The other four responded while running, "Bet!"

When Shen Yu was exhausted from running for his life, there was another commotion on the upper floor of the survival base.

Zhang Jing walked like flying, followed by a group of little old men who also walked like they were going to rob.The guards of the laboratory saw a group of old men before they had time to salute, and were ordered to open the door by the anxious old men.

The guard also knew why the little old men were so impatient. After opening the door cheerfully and quickly, they saluted and closed the door again after seeing the old men enter.

The current laboratory is an important military site, so it must be protected!

Zhang Feng and Chu Lian were the first to receive the news, and they had already arrived at the laboratory.As soon as Zhang Jing arrived, he pushed Zhang Feng away, took Qi Rui's hand and asked, "Old man, is the high-level vaccine out?"

Qi Rui's excited face was a little dazed, and he looked at Zhang Feng suspiciously.Zhang Feng helped his forehead helplessly, and pulled the old man away, "Didn't they make it clear?"

Mr. Zhang pulled his face, "What didn't you say clearly! It's clear, it's from the laboratory!"

Zhang Feng complained silently in his heart.Out?What happened? This is called listening clearly?

Hearing this, Chu Lian stepped forward silently, "Old man, probably the people below didn't make it clear. It is indeed out, but it is not a finished product of high-level vaccines, it is only a semi-finished product now."

The excitement on the old man's face cooled down a bit, and after he realized it, he walked towards Qi Rui with a serious face, "Old man, this is related to the well-being of tens of thousands of survivors, no matter what you want or how much you want, as long as you ask Yes, we will find a way to do it for you. Please take care of the vaccine, old man!"

Qi Rui suppressed the joy on his face, and said solemnly, "Don't worry, don't say that research is my lifelong wish, just take care of us nerds who can't stand shoulder to shoulder at the base, and I will do my best to develop it." Vaccines."

A faint warmth was just brewing in the laboratory, Mr. Zhang slapped Qi Rui on the shoulder, "You old boy! Good! That's great! Let's go, if you don't get drunk today, you won't return!"

Zhang Feng shyly wanted to cover his face in Chu Lian's widened eyes.Why hasn't the old man changed his temperament of going crazy when he gets excited!

After running wildly all afternoon, Shen Yu and the zombies finally separated a lot.And luckily, in the process of fleeing, I found the tallest bush near the central area.

The five of them didn't have time to rest, and each tried their best to climb to the top before the arrival of the zombie wind blade.The zombies below were still releasing the wind blades over and over again without giving up, and Shen Yu and his party on the top of the bushes were not able to reach the tree roots.

"Hurry up, time is running out, the ice must be laid before the trees break." Shen Jin said to Chen Hao.

Chen Hao nodded, and immediately began to release the ability without any explanation.A trace of cold air spread from Chen Hao's feet, stretching to [-] meters in an instant.After leaving a hole wide enough for one person to allow everyone to hide under the ice when the pioneer landed, Chen Hao thickened the thin ice layer by layer.

The pioneers who followed all the way approached tentatively when they saw a piece of ice.But the forerunner is really too heavy, several attempts have all failed.

"It's going to be broken!" Xing Wei shouted.

Accompanied by Xing Wei's roar were the crackling of the trees under Shen Yu's and others' feet and the excited howls of the seventh-order zombies.

It seemed that they noticed that the situation of everyone on the ice was not good, and the teammates on the vanguard no longer dared to take it into consideration. With the intention of testing and gambling, they brought the vanguard close to the ice.

then……

The ice cracked, the tree fell, and the Vanguard crashed with a crash.

Before Shen Yu and the others could react, the wind blades of the seventh-order zombies came towards them...

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