A dreamless night......

Xiao Fei was woken up by the alarm clock, and seemed to be very unhappy, because tonight, let alone dreaming of the underworld, he didn't even have a dream, let alone a dream that wanted to enter the depths of his subconscious.

Xiao Fei was a little puzzled, obviously he slept soundly and soundly tonight, why didn't he dream of his grandfather.

"Xiaofei, get up."

Mother knocked on Xiao Fei's door twice and walked in.

While dressing Xiao Fei, he advised: "Xiao Fei, your arm is slowly recovering now, this is a good start."

Last time the teacher said that when you were in physical education class, you didn't want to run dead, and your mother was worried about death, so don't do this, okay? ”

Xiao Fei replied absentmindedly: "I know, Mom, it won't be like that." ”

As usual, after his mother fed Xiao Fei some pumpkin porridge, they went to school together.

The first class this morning was Xiao Fei's favorite Chinese history class, and a middle-aged woman about forty years old walked into the classroom with a textbook.

"Stand up!" Lin Xiaoxiao was the first to get up and shouted.

"Hello teacher!"

The female teacher lifted the high glasses on the bridge of her nose and said with a smile, "Sit down, classmates." ”

After the students sat down, the female teacher opened the thick history textbook.

"Students, please open the hundredth chapter, and today we will review some knowledge points of the opening of the era of Huaxia Restart."

Xiao Fei also put aside his chaotic thoughts at this time, looked at the textbook that Lin Xiaoxiao helped him open, and said in his heart: This chapter seems to talk about some strange things that disappeared in the era of Huaxia Restart, and I have to listen to it again later.

History class is not only Xiao Fei's favorite course, but also the favorite course of many students, because there are no boring knowledge points in it, all great legends woven by great people, and there are also some strange but untraceable strange people and strange things.

The female teacher cleared her throat and slowly asked, "Do you know the main reason for the opening of the Huaxia Restart Era?" ”

"Energy Acid Rain!" The students replied in unison.

The female teacher smiled and continued with satisfaction: "Yes, it is energy acid rain, we will focus on the formation of energy acid rain today and how to effectively prevent energy acid rain."

Energy acid rain is actually the acid rain produced by human beings in ancient China who destroyed the environment, wantonly cut down trees and used heavy weapons of destruction on a large scale, resulting in ecological imbalance.

At that time, acid rain was only somewhat corrosive and minimally destructive, as if to remind humans to pay attention to protecting the environment, but ancient humans did not care.

At that time, there were also some superhuman beings who evolved into human beings, although there is no evidence to prove their existence, but it is indeed clearly recorded in the history books, some of these people have extraordinary physical strength, some have extraordinary endurance, some have extraordinary intelligence, and some people can also control the movement of objects by their minds. ”

"Wow!" Although the students have heard many legends about the civilization and history of ancient China, they can't help but sigh every time they talk about it.

Seeing that the students were a little quieter, the female teacher smiled and continued: "But it is precisely because of the appearance of these people that the long period of peace between countries has been broken, and wars have begun to break out continuously, and human beings have wantonly used heavy biological and chemical weapons to start wars.

Until, in the great war on the border of China, the five countries each sent the top teams of each country to start a chaotic battle, which eventually caused a global shock wave, with countless casualties, as for the weapon that caused the shock wave, it has not been found so far.

Dear students, do you remember the Lichuan River that I told you about last week? It was this war that carved the land and formed the Haihe River, which has since become a watershed between the Huaxia Kingdom and the Molan Kingdom. ”

A male classmate couldn't help but ask, "Teacher, do you mean that this energy acid rain is actually the final result of human beings' wanton destruction of the environment and waging war?" ”

"Yes, it is because of this that since then, acid rain with strange energy has been falling in the sky from time to time.

Alas, today's human beings can only be protected by constantly building family barriers, and it is difficult to go outside of Huaxia. ”

Lin Xiaoxiao raised his hand at this time and asked: "Teacher, we all know all this, but there doesn't seem to be a record in the textbook why you can't leave Huaxia Kingdom, and even leaving the city requires a very cumbersome procedure, why is this?" ”

The female teacher waved her hand and motioned for Lin Xiaoxiao to sit down, and then explained: "There is indeed no in these textbooks, but the teacher once wanted to go to a city other than Jihai City to have a look, but he was also rejected, and the reason for the refusal is also very simple, if on the way out, after encountering energy acid rain, there is no building barrier in the wild for us to hide." ”

At this time, Xiao Fei thought about it, it seemed that this was not the main reason, it may be that there are more dangerous and mysterious existences in the wild, so people are forbidden to enter and leave the city at will.

......

After the history class, Xiao Fei had already reviewed the lesson I don't know how many times, and then he began to think about the question of how to enter the underworld.

The first time I entered the Underworld Street was after being drenched in energy rain, and I didn't know how to fall asleep.

The second time I entered was when I came home after PE class that day, and I was so tired that I fell asleep.

The third time was after the battle of the lantern man, and he was physically and mentally exhausted.

Xiao Fei tried hard to connect the reasons for entering the dream three times, and it seemed that the only common denominator of these three times was "tired".

Right! It's just that I'm too tired, the kind of tiredness that is physically and mentally exhausted, and I feel so tired that I feel that all the functions of my body can't function, and it seems to be the common denominator of these three times.

Xiao Fei, who figured out this, decided to try long-distance running again in the afternoon physical education class, and he was so tired that he couldn't get up.

But after thinking about it, Xiao Fei just promised his mother today that he would not toss himself like that anymore, and he will prepare for a long-distance run when he comes to school today.

Forget it, it's the right thing to be able to enter the underworld street and find my grandfather, anyway, I don't can't think about it, just explain it to my mother then.

In the afternoon physical education class, Xiao Fei took the initiative to apply to the teacher for a long-distance run, and the physical education teacher looked at Xiao Fei as usual and seemed to be very energetic, so he agreed.

After Xiao Fei got the answer, he couldn't wait to run away, and the other classmates also looked at Xiao Fei's back and never dared to follow.

One, two, three......

Xiao Fei ran five laps with all his might, and still seemed to feel very energetic, and it seemed that if he could master the new running form, his speed could be improved by another section, which gave Xiao Fei a little headache.

I want to run out of energy, why do I run more and more vigorously today, my body seems to be reshaped, and my endurance and speed have improved.

The students and physical education teachers were a little surprised that Xiao Fei was able to go hand in hand with the school's long-distance running sports students, and it seemed that he still had some strength to spare.

Until the full 45 minutes of running, the school's sports students were tired, and Xiao Fei still looked as usual.

"Holy, this is a monster, right?"

"What kind of running form is this? Naruto? ”

"I'm tired, I remember that our sports students didn't have this person, right?"

"He seems to be the Xiao Fei who was disabled by the energy rain."

“......”