When the teacher of the jury decided whether to issue a 'special driver's license' to Luo Yan.

Luo Yan was in class.

This morning is still a general studies lesson.

The person who taught the class was Xiao Shi.

This young teacher, holding a chalk, brushed and wrote two big words on the blackboard: Return to the ruins!

Luo Yan and the other students all looked at the blackboard.

Listening to Xiao Shi, he smiled and said: "Returning to the ruins, I think everyone will not be unfamiliar." ”

"The returnee, which means to return, means to return to the place."

"The ruins are the ruins."

But together, these two words refer to the end and destination of things. ”

"Liezi. There is a record in Tang Wen. ”

"The east of the Bohai Sea does not know hundreds of millions of miles, there are big ravines, but there is only a bottomless valley, and there is no bottom under it, and the name is called the ruins. The water of the eight and nine wildernesses, the flow of heaven and Han, are all injected, and there is no increase or decrease. ”

"Zhuangzi. There is also a saying in Heaven and Earth. ”

"The big gully of the east is suitable for the garden wind on the coast of the East China Sea. Yuan Feng said: 'The son will be Xizhi?' He said, 'It will be a big gully.' He said, "Xi Weiyan?" He said: 'The husband is a big gully, and he is dissatisfied with it, and he is inexhaustible. I'm going to swim!"

"It is not difficult to see from the description of the ancient book."

"Those who return to the ruins are also bottomless pits."

"All the water in the world eventually gathers into this bottomless pit."

"But the water in the ruins does not increase or decrease in the slightest because of this."

A student asked curiously, "Teacher, does the water lead to the center of the earth?" ”

Xiao Shi smiled and said: "It's possible, but in the past, there was still a popular saying. ”

"This theory suggests that the ruins may be a wormhole, and the water flowing to it has gone to another dimension."

"Of course, there is no substantial evidence to support this claim."

He tapped the two words on the blackboard with his whip.

"But the 'return to the ruins' I want to talk about today is real."

"I still remember telling you in the first lesson of school."

"Half a century ago, the archaeological team discovered the giant beast 'Zero' in the polar regions, and when they dug down, they dug up another 'world'?"

Li Zi nodded: "The visualization techniques we are cultivating now, the combat skills we have learned, the occult arts, etc. ”

"It's all found in that 'world.'"

Xiao Shi said happily: "That's right, that 'world' is called 'Returning to the Ruins'!" ”

The class was quiet.

After a while.

Li Bohang raised his hand and said, "Teacher, is it named so by experts?" ”

Xiao Shi did not answer, but projected a photo on the blackboard.

In the photo, the lighting doesn't seem to be very good.

Judging by the surrounding scenes, it should be in a cave. Village.

In front of the cave, there was a stone door.

The stone gate feels heavy and has two stone knockers on it, making it look as if it is the gate of an ancient courtyard.

Just above the stone door that was open to the other, there was a stone plaque.

There are two words written on it.

These two words seem to be hieroglyphs.

The students in the classroom did not study the glyphs and could not see anything.

Xiao Shi pointed to the photo with his whip and said, "The name of this 'world' is not named by experts. ”

"It's that it's the name it was supposed to be."

"These are two hieroglyphs."

"Return! Wasteland! ”

"As for this stone gate..."

"It's the gateway to another world."

Then, several other photographs were projected on the blackboard.

In the photo.

There are characters, there are vehicles.

I'm doing research in front of the stone gate.

But those figures and vehicles were so small in front of the stone gate.

There was a sound of inhalation in the classroom.

In the first photo, because there was no reference, everyone subconsciously imagined this stone gate as an ordinary gate.

At most, it's the size of the city gate.

But now it seems that this stone gate is even higher and bigger than the armored gate of Guangling City.

It seems that you can let the mecha walk in directly.

If such a door is for 'people' to pass through.

So, how tall should the 'man' who built this stone gate be?

I'm afraid it must be a giant of eighty or ninety meters, right?

The young faces were full of consternation.

Luo Yan is no exception.

This stone door is really shocking.

No wonder Xiao Shi would say that this is the gateway to another world.

on the podium.

Xiao Shi continued: "Our current exploration of 'returning to the ruins' can be said to be still the tip of the iceberg. ”

"Even though many countries have invested a lot of manpower and material resources here."

"And every moment, there are countless discoveries, new things are discovered."

"Even the most advanced equipment."

"Nor can it be detected."

"How deep is the ruins?"

On the blackboard, the photos were gone.

A floor plan appeared.

As can be seen on the floor plan, a passage, inclined downward.

above this channel.

At regular intervals, a horizontal line is drawn.

Those horizontal lines are marked with a set of numbers.

Xiao Shi tapped this picture with a whip and said, "The ruins are not straight down, but oblique, at an angle of about 45 degrees. ”

"All the way to the depths of the earth."

"At the moment, the deepest place that our equipment can explore is 15,000 kilometers above the ground."

Fifteen thousand kilometers!

There was another whisper in the classroom.

The ruins are 15,000 meters deep, and that's not the limit.

It's about the limits of what you can do with existing equipment.

If it is said.

And that's just the tip of the iceberg.

How big does that 'return to the ruins' have to be?

It should be like a planet, right?

No wonder Mr. Xiao Shi has a 'world' to describe 'returning to ruins'.

It's as vast as the surface world.

Xiao Shi coughed dryly twice, drawing everyone's attention back again.

"In addition, in addition to the depth, the further down you go, the greater the width of the ruins."

"We've discovered a city about 5,000 meters underground."

"And there's a lot of petrified primeval forest."

"And before that, we had found countless villages."

"As for the petrified forests, canyons, mountains, lakes, you name it."

"That underworld has no sun, moon, stars, and sky except for it."

"It's not very different from the surface world we live in."

"We have reason to believe it."

"Before the advent of dinosaurs."

"On this planet, an underground civilization was once born."

"A vast world, just beneath this planet!"

Suzu –

The bell rang for the end of class.

Xiao Shi turned off the projector and said with a smile: "Okay, that's all for today's class." ”

"Regarding the 'return to the ruins', it needs to be kept strictly secret."

"You are not allowed to reveal it to anyone outside the Academy, not even to your closest ones."

"If you violate it, you will be severely punished once it is discovered."

"So, class!"

Get out of the classroom.

Luo Yan still had some unreal feelings.

Underneath the polar regions, there is an entrance to another world.

Were the construction of these underground cities inspired by the 'return to the ruins'?

Luo Yan's thoughts were diverging.

was suddenly stopped by Wei Fenghua.

"Borrow a step to speak." The dean's expression was a little serious.