When the teachers on the jury were deciding whether to issue a 'special driving license' to Luo Yan.
Luo Yan is in class.
This morning is still a general knowledge class.
The person teaching the class was Xiao Shi.
This young teacher took the chalk and wrote two big words on the blackboard: Guixu!
Luo Yan and other students all looked at the blackboard.
Then I heard Xiao Shi smile and say: "Guixu, I believe everyone will be familiar with it."
"Return means to return to the original place."
"Ruins are ruins."
"But these two words taken together refer to the end and destination of things. "
"There is a record in "Liezi. Tang Wen"."
"I don't know how many billions of miles to the east of the Bohai Sea, there is a big ravine, which is actually a bottomless valley. There is no bottom under it, and it is called Guixu. The water of the eight rivers and nine fields, the currents of the heaven and the Han Dynasty, all pour into it, and there is no There is no increase but no decrease.”
"There is also a saying in "Zhuangzi. Heaven and Earth"."
""Zhenmang leads the great ravine to the east, and encounters the wind of the garden on the shore of the East China Sea. Yuan Feng said: "The general will ridicule him?" He said: "The general will make a big mess." ' Said: 'What is the point of ridicule? ' Said: 'The husband is a big man, he is a thing. I will travel far away!"
"It's not difficult to tell from the descriptions in ancient books."
"Those who return to ruins are like bottomless pits."
"All the water in the world will eventually gather into this bottomless pit."
"But the water in Guixu has not increased or decreased at all because of this."
Some students asked out of curiosity: "Teacher, does all the water lead to the center of the earth?"
Xiao Shi smiled and said, "It's possible, but there was a popular saying in the past."
"This theory suggests that Guixu may be a wormhole, and the water flowing to it goes to another dimension."
"Of course, this statement is not supported by any substantial evidence."
He tapped the two words on the blackboard with his pointer.
"But the 'return to ruins' I'm going to talk about today actually exists."
"I still remember what I told you in the first class of school."
"Half a century ago, the archaeological team discovered the giant beast 'Zero' in the polar regions. When digging downwards, did they dig out another 'world'?"
Li Zi nodded: "The visualization techniques we practice now, the combat skills, mystical arts, etc. we are learning."
"They are all found in that 'world'."
Xiao Shi said happily: "Yes, that 'world' is called 'Guixu'!"
Be quiet in class.
After a while.
Li Bohang raised his hand and said, "Teacher, did an expert name it like this?"
Xiao Shi did not answer, but projected a photo on the blackboard.
In the photo, the lighting seems not very good.
Judging from the surrounding scenes, it should be in a cave.
In front of the cave, there is a stone door.
The stone door feels thick and heavy, with two stone door knockers on it, making it look like the gate of an ancient courtyard.
Just above the opposite stone door, there is a stone horizontal plaque.
There are two words written on it.
These two characters seem to be hieroglyphs.
The students in the classroom had not studied hieroglyphs and could not understand anything.
Xiao Shi pointed at the photo with his pointer and said: "The name of this 'world' was not named by experts."
"But that's what it was originally called."
"These are two hieroglyphs."
"Return! Ruins!"
"As for this stone gate..."
"It's a doorway to another world."
Then, several other photos were projected on the blackboard.
Inside the photo.
There are people and vehicles.
I am doing research in front of the stone gate.
But those characters and vehicles were so insignificant in front of the stone gate.
There was a sound of inhalation in the classroom.
When taking the first photo, since there was no reference, everyone subconsciously imagined the stone gate as an ordinary gate.
At most, it is the size of a city gate.
But now it seems that this stone gate is even taller and larger than the armored gate in Guangling City.
From the looks of it, it's entirely possible for the mecha to walk right in.
If such a door is for "people" to pass through.
So, how tall should the 'person' who built this stone door be?
He must be a giant of eighty or ninety meters, right?
Shock was written all over the young faces.
Luo Yan is no exception.
This stone door is really shocking.
No wonder Xiao Shi would say that this is the door to another world.
On the podium.
Xiao Shi continued: "Our current exploration of 'Guixu' 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 and new things being discovered."
"Even the most advanced equipment."
"It's also undetectable."
"How deep is Guixu?"
On the blackboard, those photos were missing.
A floor plan appears.
As can be seen in the plan, there is a passage, sloping downwards.
above this passage.
At regular intervals, horizontal lines are drawn.
Those horizontal lines are marked with a set of numbers.
Xiao Shi clicked on the picture with his pointer and said: "Guixu is not straight down, but inclined, at an angle of about 45 degrees."
"All the way to the heart of the earth."
"Currently, the deepest point our equipment can explore is 15,000 meters above the ground."
Fifteen thousand meters!
There was another soft cry in the classroom.
Guixu is as deep as 15,000 meters, and this is not its limit.
It is the exploration limit of existing equipment.
If.
This is just the tip of the iceberg.
How big is the 'Guixu'?
It should be similar to a planet, right?
No wonder Teacher Xiao Shi used the word "world" to describe "Guixu".
It is as vast as the surface world.
Xiao Shi coughed twice, drawing everyone's attention back.
"In addition, in addition to the depth, the further down you go, the wider the width of Guixu becomes."
"Currently we have discovered a city about 5,000 meters underground."
"There are also large areas of petrified virgin forest."
"And before that, we discovered countless villages."
"As for petrified forests, canyons, mountains, and lakes, there are all kinds of them."
"Except that there is no sun, no moon, no stars, no sky in that underworld."
"It's not that different from the surface world we live in."
"We have reason to believe that."
"Before the days of dinosaurs."
"On this planet, an underground civilization was once born."
"A vast world lies beneath the surface of this planet!"
bell--
The get out of class bell rang.
Xiao Shi turned off the projector and said with a smile, "Okay, that's it for today's class."
"About 'Guixu', it needs to be kept strictly confidential."
"You are not allowed to reveal it to anyone outside the academy, not even your closest relatives."
"Any violation will be severely punished once discovered."
"Then, get out of class is over!"
Get out of the classroom.
Luo Yan still felt a little unreal.
Beneath the pole, there is the entrance to another world.
Was the construction of these underground cities inspired by the "Guixu"?
Luo Yan's thoughts were wandering.
Suddenly he was stopped by Wei Fenghua.
"Take a step to speak." The dean said with a serious expression.
