Jia Yang cried for a long time, crying until Xiao Gu's power warning sounded, and the display screen kept flashing red.

We didn't dare to disturb him because Lin Yan and I had experienced this kind of pain before, but his pain was even more cruel and heartbreaking than ours.

When he lifted his tear-stained face, his younger brother had already finished eating and slowly walked to the end of the street.

He gazed at the distorted figure on the screen for a long time, wiped away the tears from his face, and controlled Xiao Gu to open the door of the SUV, taking the photo pressed under a pair of sunglasses on the windshield.

It was a family photo, showing a family of four with happy smiles.

He operated the computer to activate the solar charging system of Xiao Gu and walked to the sunniest spot on the road.

The sun was very strong today, and Xiao Gu only stood for ten minutes to charge up to 80%, which was enough for the journey to the research institute and back.

"Brother Lin Yan... What should we do next?" he asked Lin Yan, his voice thick with nasal congestion, struggling to suppress the choking sensation in his throat.

Lin Yan extinguished the third cigarette he had just lit, saying, "...Turn around and make a left."

There weren't many surprises along the way, except for the foolish zombies that heard the sound of the car but couldn't catch up with us.

Under the remote control of the computer, Xiao Gu opened the gate of the research institute.

The once bright research institute was now gloomy, filled with human limbs and wandering zombies.

Lin Yan looked at the place where he had worked for six years after graduating, his expression somewhat dazed, his eyes slightly red.

The equipment was on the second floor of the research institute, and with Lin Yan's guidance, finding the equipment went smoothly. In the process, Xiao Gu also took away several files about the virus from the laboratory.

But as we were about to leave the second floor after Xiao Gu walked out of the laboratory door, we saw a scene that shocked all three of us.

- A giant male zombie, about two meters tall, was sweeping everything in the research institute with its four extremely long tentacles.

All the machines, experimental reagents, and chemicals were knocked over on the ground.

We stood still for a few seconds until the zombie walked towards Xiao Gu, causing us to snap back to reality in a state of uncertainty.

Lin Yan quickly pointed to the other side of the passage for Jia Yang, and Jia Yang immediately controlled Xiao Gu to slide in the opposite direction. The speed was extremely fast, like a robot wearing roller skates, and quickly slid down another sloping passage.

The zombie heard the sound and kept chasing after Xiao Gu, occasionally sweeping its tentacles towards Xiao Gu.

"Don't zombies distinguish humans by scent? Shouldn't they not attack Xiao Gu?" I looked at Lin Yan with confusion.

"This zombie... has mutated. It attacks indiscriminately based on sound... It must have entered a frenzied state," Lin Yan explained.

Jia Yang brought up the monitor behind Xiao Gu's head, split-screening the front and rear views. While controlling Xiao Gu to rush out of the research institute, he also controlled Xiao Gu to dodge the zombie's tentacles.

Zombies in dark buildings moved very quickly. After escaping from the research institute in a thrilling manner, the zombie still relentlessly pursued. However, when exposed to the sunlight, its movements indeed slowed down significantly, although it was still much more agile than those in a frenzied state.

Xiao Gu rushed into the car, quickly started the small van, stepped on the accelerator, and circled around two blocks before finally getting rid of the chasing zombie monster.

Jia Yang sat in the chair, sweating profusely, and let out a sigh of relief. "Fortunately, that day when I asked him to go to the supermarket for supplies and found that he was being chased by zombies for a while, I immediately equipped him with transforming wheels under his feet. Otherwise, we really wouldn't have been able to escape this time."

But Lin Yan and I were still thinking about that mutated zombie.

Has it really mutated for the second time?

If we count the frenzied state, wouldn't it be the third mutation!