It was very thick, with ups and downs, and you could tell that everyone was shocked and desperate.

For those who have faced alien species head-on, they are well aware of how terrifying they are, and they absolutely do not want to see another door in the world that allows alien species to run rampant.

If there is anyone in this world who is willing to see the second threshold coming, it is probably the controllers of the federal government - the tycoons standing at the top of the pyramid.

Tu Ran glanced through a few pages of information related to threshold last night.

The Threshold suddenly appeared fifteen years ago. It is a high wall that blocks out the sky and the sun, standing abruptly twenty kilometers east of the administrative building in the federal center.

This high wall seemed to be built in one second. Countless surveillance cameras recorded that second. At first, it was gray, like a projected three-dimensional wall. Then the color of the wall gradually deepened, and the material became solid and textured. In just one second, a wall fell from the sky.

The federal government sent a drone to fly to the top of the wall for investigation, but it only reached a height of 400 meters before the drone lost power and fell down. There was an unknown force that was preventing any material inspection.

The height of the wall is not visible, but the width of the wall can be observed with the naked eye.

And when you see the width of the wall, you will be even more shocked that this wall cannot be built with current human technology.

Because it is only a thin layer thick.

It seems to be just a simple mix of black bricks and cement soil, but everyone can understand that without a strong foundation support, this hundred-meter-high wall cannot stand at all.

And the terrifying thing is that this wall has no foundation.

Since the upper part was blocked, the federal government sent people to dig underground. After only three or four digs, they dug from the front of the wall to the back of the wall. The federal government then discovered that the wall had no foundation at all.

The sudden appearance of this strange wall immediately attracted the attention of many people. People discovered that although this black wall was real, it could let in sunlight and did not leave any shadows. Then, a folk explorer discovered that people could pass through a certain part of the wall directly.

The explorer discovered this and reported it to the federal government, which immediately sent experts to investigate, but they could not find out what was behind the wall. Although everyone was curious about what was behind the wall, no one dared to go in.

The drones, detectors, and life detectors that were sent out lost their signals the moment they passed through the wall.

No matter how large the bomb was, it was like a feather falling on the lake, unable to create any waves.

"Surprise! The gate to the parallel world makes its debut!"

A report came out of nowhere and became a hot topic among the people.

More and more adventure enthusiasts wanted to take a look at the other side of the wall. After obtaining the consent of the federal government, they entered the wall in groups.

One day, two days, three days...a month passed.

They never appeared again.

During this period, the experts who had been guarding outside the wall discovered that the "door" was closed.

People can't put their hands in, bullets can't be shot in, and bombs can't be thrown in.

It seems that this wall has really become an ordinary wall.

Just when everyone thought that this wall would remain sealed forever and the people inside would never be able to get out, someone keenly discovered that the "door" had opened.

(End of this chapter)