Outside the city wall, Yu Su and Tang Yiyang found a place to stand.

Yu Su glanced at the inside of the city wall with concern, and said, "Is there a way to clean it up at once?" Is there a core, a brain, or anything like that. ”

Tang Yiyang closed his eyes and felt it for a while, then frowned and said, "It's quiet now, I can't feel it, I can only wait until the next attack." ”

Yu Su also knew that this matter was not in a hurry, so she could only wait patiently, during which she went to the military to apply for some weapons to facilitate the targeted solution of mutant plants next time.

It's just that I didn't expect that this wait would be half a month.

The army that tightens its spirits every day is a little lax, not to mention the undisciplined survivors of freedom. Some believe that mutant plants will not make a comeback, and advocate lifting the alert.

The uneasiness in Yu Su's heart became heavier and heavier, and the vigilance in his heart also increased a lot.

In the middle of the night, as the mountains shook for a while, Yu Su knew that the mutant plants had invaded again.

Tang Yiyang's speed couldn't catch up with Yu Su, but he used his spiritual ability to convey the news that had been prepared, and Yu Su ran forward along its dancing roots without hesitation.

However, the further they went, the more dense the root system became, and Yu Su slowed down for a while, slashing them with the long knife he had just exchanged.

Soon, Tang Yiyang followed, "southeast direction".

Yu Su breathed a sigh of relief, Tang Yiyang hugged Yu Su's waist, and the two of them killed all the way in.

The fly ash turned into mutated plants quickly covered Yu Su's face, and the more the two of them walked forward, the more difficult it became.

Presumably, the plant also knew where it couldn't be touched by others, except for the roots that invaded N City, almost all the others were besieging the two of them.

"It's not going to work, it's too exhausting. Tang Yiyang, you prepare a grenade. ”

Even the physical strength of mutant zombies can't withstand human grenades, but zombies don't feel pain, and their speed is easy to dodge grenades, so they can't be used on a large scale.

However, these huge and tangled root systems are not so flexible, on the contrary, they are very congested because of their large numbers.

Tang Yiyang and Yu Su back to back, took the grenade she handed over, pulled out the pull ring on it with force, and then threw themselves to the ground with Yu Su in their arms.

They heard a loud bang, and a wave of air rushed in, and when they got up again, they saw that the roots of the plant had been blown out of a terrible hole.

Yu Su pulled Tang Yiyang and continued to walk inside, in the past half a month, she has absorbed more enhancers, although she is very tired, it is okay.

It took more than an hour for the two of them to get close to the core that Tang Yiyang felt.

The roots of the mutated plant extend into the ground, still maintaining the nature of the plant.

Yu Su said: "You feel the specific location, I will bury explosives." ”

This move was dangerous, but Tang Yiyang knew her stubbornness, so he nodded.

Under Tang Yiyang's guidance, Yu Su planted the explosives and ignited the fuse as quickly as possible, and at the same time, Tang Yiyang's spiritual system was also able to fire with all his strength, severely suppressing the spiritual core of the plant.

Yu Su threw Tang Yiyang to the ground again, and the explosion kicked up a cloud of dust.

Yu Su subconsciously closed his eyes and lowered his head, but his lips touched a piece of softness.

She panicked and quickly rolled to the side.

At this time, Yu Su was covered in dust, and there were some more blood marks on his body that had been bitten by plants, and his beautiful face was dirty, but he still couldn't hide the blush on his face.

Yu Su quickly retracted his thoughts and looked at the place where the explosion had exploded.

The remaining root system was just wrapped into a ball, and Yu Su rushed up to cover up his embarrassment, splitting the last root system and seeing a huge green heart that was shrinking.

At this time, the mutant plant had no way to resist Yu Su's killing intent.

Tang Yiyang said: "It's showing surrender. ”

"No, it eats so many people, I look sick." Yu Su smiled evilly, watching his huge heart shrink into a small ball because of fear, and slashed down with a knife.

Green blood spilled on the ground, emitting a fishy smell, and there were several granular things in it that shone brightly.

Yu Su endured the nausea and took a look, but found that it was something like a few seeds, and she carefully put it away, planning to have a chance to study it.

Finally completed the task, Yu Su breathed a sigh of relief, and finally forgot about the embarrassment when he looked at Tang Yiyang.

returned to N City and handed in the task, and the two of them drove back to S City.

Master Li expressed his gratitude, and fulfilled his promise at that time, taking her to the old professor.

The old professor was about sixty years old, and his face looked a little haggard because he was always disturbed by plants during this time.

"Thank you for dealing with that plant, otherwise N City would be finished."

Yu Su smiled, "This is nothing, when the survival of mankind is dying, we should contribute if we have the ability." ”

8888 was almost flashed to the waist by Yu Su's sudden righteousness.

After chatting with the old professor for a while, Yu Su said his intention, "I want to inquire about the situation of the biological laboratory in City B." ”

The old professor's face changed and said, "This matter is confidential. ”

Yu Su's fifty percent must have become ten percent immediately, and the biological laboratory in City B must be the place she was looking for.

Yu Su said: "Professor, the secrets are meaningless now, and I have heard some news that the laboratory is related to the outbreak of the zombie virus. ”

Tang Yiyang wanted to look at her, but he couldn't help it, the two of them could be regarded as getting along day and night during this time, and they had never seen her understand anything.

Yu Su continued to open his eyes and talk nonsense, "Now that there is no progress in the research of zombies in various security zones, it is better to try to explore the source, even if it is not really solved, it is better than catching the blind now." ”

The old professor was frightened by Yu Su's words, where did the zombie virus spread?

"No, the City B Biological Lab is just doing human experiments."

Of course, it is the kind that does not violate ethics and morals, does not need to be alive, and has volunteers sign the agreement.

The old professor couldn't help but say something when he saw it, so he simply gave up resistance and confessed it.

Before leaving the old professor's laboratory, Yu Su got the layout, map, personnel distribution, and operation precautions of the biological laboratory in City B, and there was a bag of seeds of the mutated plant missing in his pocket.

The two of them left N City, and Yu Su planned to solve Yang Yongzhe and Lin Ling when she went back this time, and when the time came, she would go to City B again, and her task would be completed.

On the way back, Yu Su was in a good mood, and before passing by the county seat, she also made a special trip to the supermarket to find some children's toys to bring over.

It's just that when Yu Su went upstairs, he only saw Zhao Cuifen's daughter.

She suddenly had a very bad premonition in her heart, Zhao Cuifen can be said to love her daughter like life, how could she let herself be here alone?