The huge sound wave was like a raging tide, slapped out from the inside of Zhongshan City, swept over all the spiritual events that were happening at this time, and made those spiritual forces that were originally active froze a little bit.

That voice seemed to be real, but it didn't face the destruction of a large number of houses, it seemed to be just a hallucination imagined in the mind.

However, for the sake of safety, Liu San and Bai Hui subconsciously covered their ears when the sound came.

In case the sound was related to the door knocker, they could be more or less on guard, so as not to belch in an instant during this sudden attack.

"Boom--"

The terrifying sound wave was like a bomb, hitting the wall here precisely, overturning this enclosed space in an extremely violent way.

For a while, the dust was flying.

A large amount of dust mixed with the fragments of the wall splashed out to the surroundings, and Liu San and Bai Hui who had no time to escape were also buried in it.

The spreading sound wave lasted for a full ten seconds before it started to stagnate, allowing the supernatural power it had covered up to regenerate and cover the distorted area again.

"hiss……"

There was a slight trembling in the ruins not far away, and then a hand stretched out, Liu San pushed aside the building debris on his body, his mind went blank.

But when he saw that there was an extra exit in the originally closed position, he couldn't help but widen his eyes.

I saw an old school in the extra area, its name was covered by a large cobweb. In that gloomy world, no second building could be found, and there was a long and narrow figure from time to time , Walking through the gray corner.

"This is, this is..."

Looking at the extremely abrupt building, Liu San immediately recalled what was described in the archives of Dachang City.

According to incomplete statistics from the headquarters, the "ghost knocking on the door" that shocked the world first appeared in a middle school in Dachang City.

At that time, in less than a day, Zhou Zheng, the person in charge of Dachang City at that time, and most of the ordinary people were killed. Only seven survivors survived in the end, which caused a huge impact.

But after that incident, the knocker who made the headquarters not know how to end it left by himself, and took the school with him, leaving a shocking scene in its original place.

Regarding the fact that the school suddenly disappeared within a day, the headquarters gave an outside response that the building collapsed, and it also pretended to play some sounds similar to blasting to confuse the outside.

But the actual situation is that the huge building has become a part of the haunted ghost of the knocker, so he will take it with him when he leaves.

"It seems that I have officially come to the world of the door knocker now. Those areas before are just the parts distorted by it, not a formal contact..." Liu San's eyes flickered, feeling a heavy pressure.

At this time, the sound of stones falling to the ground also sounded behind him. The somewhat embarrassed Bai Hui staggered, her body was covered with dust, but judging by her appearance, she did not suffer any obvious injuries, which was considered a blessing among misfortunes.

But Bai Hui didn't know the relationship between the school and the "Ghost Knocking on the Door Incident". Seeing a building outside, she thought she had found an exit, and stepped out, her body trapped in the fog.

"You..." Seeing Bai Hui go out, Liu San couldn't help but want to remind her, but it was too late, "It's not safe outside, we'd better not wander around, and wait for the headquarters' support here."

"Not safe? But the exit is right in front of you, the chance of being attacked by that ghost will be greater if you stay where you are." Bai Hui felt that Liu San was a little too cautious. Compared with unknown things, she was more worried about whether there would be a knock on the door sounded.

Moreover, I don't know what happened to the loud noise that came from the city center just now, but it actually caused such a big impact.

Estimated at the speed of sound propagation, the ten-second scream was probably heard by more than half of Zhongshan City, and it will trigger a new round of criticism.

Even though he wanted to refute Bai Hui, Liu San couldn't sit still seeing that she stayed in that gloomy world for three or four minutes without being attacked.

If you want to find a location and wait for the person in charge of the headquarters to explore together, then the outside world is undoubtedly more convenient.

No one can predict whether the aisle leading to the theater will still exist in the near future.

"Forget it, let's stay together."

After comparing the possible situations, Liu San finally walked out of the passage and actively entered the world of knocking ghosts.

No matter what, they haven't been directly attacked by the door knocker so far. Perhaps as long as they find the corresponding exit, they won't have a chance to leave.

"This seems to be a school... But why is there a school in the Blue Star Amusement Park? Could it be a new type of escape room?" Looking at the unclear handwriting, Bai Hui wondered.

Hearing her question, Liu San hesitated for a while and decided to tell Bai Hui something. After all, the "ghost knocking on the door incident" reappeared so suddenly, it would be good for Bai Hui to know more information.

But this is the time.

Liu San suddenly caught a glimpse of a rotten figure behind the window of a certain floor, staring at the two of them.

But when he looked back, there was nothing there, only a bloody palm print was left, as if foreshadowing something.

"Ta Tata..."

There was a sound of footsteps.

Liu San and Bai Hui quickly inspected the surroundings, but they didn't see anything. The owner of that footstep seemed to be hidden in this fog, obliterating his own figure, and getting closer to their position.

In this situation, there was no thought of whether the visitor was a human or a ghost, and Bai Hui didn't care so much, and directly showed a terrifying half ghost face.

Like a flashlight, his gloomy gaze penetrated directly into the gray corner, and he glanced at a pair of plain and old safety shoes.

"Something is coming!" She hurriedly told Liu San beside her what she saw, raised her eyes, and fully saw the appearance of the person who came.

It was an old man with a withered face, wearing a long gown unique to the last era, his complexion was pale, his eyes were numb, and he exuded a cold aura that only corpses could have, which made people daunting.

At the same time, the old man walking in a layer of maze stopped and slowly raised his head, noticing the peeping eyes. He kept his body stiff, raised his arm, bent three fingers, and made a gesture as if knocking on the door. Actions.

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