After some arduous exploration, they finally found some clues about the energy source. The clues pointed to an ancient clock tower in the center of the city. Everyone rushed towards the clock tower without stopping.

When they arrived at the foot of the bell tower, they found that it was already guarded by a group of powerful zombies. These zombies seemed to be affected by some mysterious power and were more ferocious than the ones they had encountered before.

The scarred man frowned as he looked at the situation. "It seems that if we want to get the energy source, we must first get rid of these zombies."

Xiao Yi took a deep breath and said, "Everyone come together, I will use my supernatural powers to attract their attention.

He decided to use the billboard frame to create some obstacles and slow down the zombies' advance. Xiao Yi quickly ran under the billboard frame and climbed up using his hands and feet. The frame creaked under his weight, as if it would collapse at any moment.

Once he reached a certain height, he began to vigorously shake one of the supporting columns. After some effort, the support column gave way, and the billboard frame tilted and fell toward the zombie horde. With a loud thud, the billboard slammed to the ground, partially blocking the zombies' path.

Taking advantage of the gap when the zombies were blocked, Xiao Yi quickly jumped down from the shelf and ran towards the building. He came to the door of the building and pushed hard, but the door did not budge. He walked around to the side and found a side door half-open, so he walked in carefully.

The interior of the building was dim and filled with the smell of stale dust. Xiao Yi, his weapon tightly gripped, inched forward. Suddenly, a zombie burst from the corner, claws and fangs bared, lunging at him. Xiao Yi dodged to the side and smashed the zombie's head with a steel pipe. The zombie fell to the ground with a thud, motionless.

After dispatching the zombie, Xiao Yi continued exploring. He discovered a shopping mall. The first floor was mostly filled with clothing and accessories stores, shelves tilted and merchandise scattered across the floor. He ascended the stairs, taking each step with extreme caution, fearing any noise would attract more zombies.

When he came to the second floor, he heard a strange sound, like someone crying softly. Xiao Yi walked in the direction of the sound and found a little girl in a corner. The little girl looked only eight or nine years old, with messy hair and a look of fear in her eyes.

Xiao Yi asked softly: "Little friend, why are you here?"

The little girl sobbed and said, "I got separated from my parents, and then I hid here and didn't dare to go out."

Xiao Yi felt a surge of pity. In this doomsday, a child facing such a dangerous environment alone was too pitiful. He decided to take the little girl with him to find a safe place.

At this moment, the sound of zombies hitting the door came from downstairs. It seemed that the group of zombies had chased here. Xiao Yi knew that he had to find a safer place to hide as soon as possible.

He took the little girl upstairs and came to the third floor. Here was the food court, with many tables, chairs and food stalls. Xiao Yi suddenly thought that he could use these tables and chairs to set up obstacles and strengthen the defense.

He and the little girl worked together to move the tables and chairs to the stairwell, piling them up layer by layer to form a simple defense line. As soon as they were done, the zombies rushed up the stairs.

The zombies madly rammed the tables and chairs, making bursts of roars. Xiao Yi stayed behind the defense line, and whenever a zombie broke through the defense line, he used a steel pipe to repel it. The battle entered a white-hot stage, and Xiao Yi gradually felt physically exhausted, but he knew he couldn't give up because there was a little girl behind him who needed protection.

In the nightmare-like world of the apocalypse, death and fear follow like shadows. Xiao Yi and the little girl were trapped in this abandoned factory by a group of highly intelligent zombies, as if they were in the abyss of despair.

In the fierce battle, Xiao Yi calmly observed the movement patterns of these highly intelligent zombies, trying to find their flaws. He found that whenever he concentrated lightning to attack a point, the zombie group's formation would be briefly disrupted.

Xiao Yi knew that this brief period of chaos was the key to their survival. He immediately shouted to the little girl, "Sister, when I create a chaotic zombie formation, run to the corner of the factory. There's a small room there. Hide in there and don't come out!" Although the little girl's face was filled with fear, she nodded firmly.

Xiao Yi took a deep breath, concentrated his mind, and turned the power of his modified lightning weapon to the maximum, firing it towards the center of the zombie group. A dazzling flash of lightning flashed, accompanied by the sound of "crackling" electricity. The zombies that were hit instantly convulsed and fell to the ground. The surrounding zombies were also affected, and the formation was temporarily disrupted.

"Run!" Xiao Yi shouted, and the little girl ran towards the designated corner like an agile deer. Xiao Yi, holding a steel pipe, struggled to fend off the zombies that tried to catch up.

After finally watching the little girl hide safely in the small room, Xiao Yi turned around and threw himself into the battle with the zombies. But there were too many zombies. Although Xiao Yi relied on his agility and tenacious will to repel them again and again, he gradually felt exhausted.

At this moment, Xiao Yi discovered a new situation. There seemed to be a zombie in the zombie group that was particularly large and more agile. It seemed to be commanding the other zombies. Every time the formation was disrupted, it was this zombie that quickly reorganized the attack.

Xiao Yi gritted his teeth and decided to capture the leader first. He saw the right moment and rushed towards the commanding zombie like an arrow when the zombies were once again in chaos after being attacked by lightning.

The zombie seemed to sense the danger, it roared, showing its sharp teeth, and pounced on Xiao Yi. Xiao Yi dodged its attack by moving sideways, then stabbed the steel pipe into the zombie's neck with all his strength.

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