As a member of the integer system, zero has a special significance in the field of mathematics and is like a cornerstone for the development of basic mathematics. With-Dream- . lā

How special is zero?

It is between - and is the smallest natural number, taking into account the sequence of rational numbers, which is neither positive nor negative, it is the dividing line between the two, and there is no reciprocal number.

The opposite of zero, the absolute value, the square root, the cube root are all zero, zero multiplied by any integer is equal to zero, and the multiple of zero is also zero.

As an extremely important member of the field of mathematics, zero has contained all kinds of mystical colors since its birth, after the discovery of zero, it initially symbolized the meaning of 'nothingness', and with the introduction to the West, due to the existence of zero, many calculations and logic could not be established, and then listed as devil numbers, and were banned.

Zero!

Unique Zero!

"Uh...... Truly. ”

Hearing Dean Li Hongyuan's words, Zhou Hai was slightly stunned, immediately woke up and understood, smiled, and did not reveal his true thoughts.

He would never explain that he chose this code name just for the beauty from afar.

"Good name, the first in the country."

After complimenting him, Li Hongyuan, who was smiling all over his face, picked up the tactical tablet terminal and handed it over to Wang Zhuyu and others in turn.

Ten minutes later, after everyone took the code name one after another, accompanied by the warm applause of all the witnesses, the sacred and solemn graduation and promotion ceremony of the Shicheng Flying Academy Higher Education Aircraft officially ended and came to an end.

The three comrades-in-arms and the rest of the flight students in dormitory 308 rushed up and sent their blessings and thanked them.

With endless laughter and blessings, the eight people who have become official third-class pilots of the Air Force are about to bid farewell to the long-lived Shicheng Flying Courtyard and start a new journey.

As the night deepens, the bright moon hangs high on the top of the sky, releasing endless silver moonlight.

Tonight is Zhou Hai's last night in Shicheng Flying Courtyard.

……

Following.

On the eve of dawn, the sky was bright.

The first dormitory building for boys, dormitory 308, was silent.

Xiao Nan, Zhao Ziqing, and Han Li, who had been sleepless all night, were wearing training uniforms, standing in a military posture, and their eyes were silently looking at Zhou Hai who was sitting on the edge of the bed.

Silent.

Be quiet.

There is also a hint of parting sadness.

The night of hustle and bustle has passed, and everything that needs to be said has been said.

Now, wait quietly.

Time passed little by little, until: 30 minutes, the familiar wake-up call sounded on time, spreading throughout the Shicheng Feiyuan camp.

"Old Zhou, it's time."

Hearing the wake-up call in his ears, Xiao Nan, who was the head of the 308 dormitory and the daily lying corpse salted fish, opened his mouth and whispered, breaking the silence in the dormitory, and reminded.

It's time to leave!

On the side, Han Li's eyes were rosy, and crystal clear tears swirled straight down, holding back the emotions in his heart.

Zhao Ziqing, who is like the son of a family, is full of smiles and is silent.

Parting, this is a rare and unforgettable experience.

"Okay."

Zhou Hai, who was wearing summer clothes, looked at the three of them, nodded, a habitual smile appeared on his face, got up from the edge of the bed, and picked up the luggage backpack containing personal belongings.

"Squeak!"

At the same time, the door of the 308 dormitory slowly opened, and two figures stood at the door, instructor Yang Xiaolong stood in the middle of the door, and on the right hand was a young officer about twenty-seven or eighteen years old.

The whole person is wearing a light green anti-load suit at the level of a fighter pilot, with upright facial features, a rounded face, a constricted chin, bronzed skin, and black pupils embedded in bright eyes, revealing a sense of determination.

On the right chest of the leather jacket, he wears a sky blue two-wing second-class pilot badge.

Standing in front of the door of the bedroom, Yang Xiaolong looked at Zhou Hai, his slightly wrinkled face, and a kind meaning emerged: "Zhou Hai, are you ready?" ”

"Instructor Yang, I'm ready."

Looking at the strange young flying officer, Zhou Hai stood in a military posture and nodded in response.

The young officer standing on the side, with a slightly mellow face, showed a serious look, stretched out his right hand to Zhou Hai, and said with a straight face: "Comrade Zhou Hai, hello, I am the base pick-up officer, codenamed Overlord, your files and procedures have been transferred, I am responsible for transporting you to the base, is there anything else that needs to be dealt with?" ”

"Yes."

Hearing this, Zhou Hai nodded and put down his backpack.

Immediately afterwards, the whole person turned around, faced the silent 308 bedroom, and walked straight towards Xiao Nan, who was standing quietly, standing in front of him, smiling all over his face, and gently spreading his hands.

No words, a smile, is enough to show everything.

Xiao Nan, who has always been heartless, had a sour nose, gritted his teeth, and learned from Zhao Ziqing, forcibly squeezed out a smile on his face, opened his hands, hugged Zhou Hai, and hugged his right hand tightly.

They hugged each other for three seconds, but they gently separated.

Zhou Hai had a smile on his face and sent his blessings: "Old Xiao, maintain a relationship with the squad leader Wang, you can go to Hu Jun to study if you have nothing to do, and strive to graduate as soon as possible." ”

"Yes."

Xiao Nan nodded again and again, his eyes were red, holding back tears, and he was a little choked.

Then, patting Xiao Nan's solid shoulder, Zhou Hai turned to Zhao Ziqing, still smiling like a spring breeze, and gently opened his hands.

Zhao Ziqing, who has an elegant temperament, also smiled and reached out to hug Zhou Hai.

"Lao Zhao, you are a smart person, you always look for opportunities to extort my pocket, but this time there is no chance, before leaving, it is still the same sentence, safety first."

"Have a safe journey, Lao Zhou."

"Don't cry, Old Han, you are a young eagle, a proud son of the sky, don't cry like a girl. You have a good talent for flying, don't let up, study hard, and put safety first. ”

"I will, Old Zhou."

Embrace.

A final hug before parting.

Han Li, who had the weakest grades, had already soaked his eyes with tears after he hugged and separated from Zhou Hai, blurring his vision.

Returning to the door of the 308 dormitory, Zhou Hai stood upright, with a smile on his face, and raised his right hand: "Three brothers, we will meet in the future." ”

"Huh!"

The three of them raised their right hands neatly, put their fingers together, and made the most standard military salute.

Everyone understands that if you want to meet again, I don't know what year or month it will be.

Zhou Hai, the comrade-in-arms who cut through the sky like a meteor and completed the assessment in only five months, has long been integrated into the entire 308 dormitory collective and into the memories of the three of them.

"Let's go."

Yang Xiaolong said softly.

Zhou Hai nodded, picked up the luggage backpack, with a smile on his face when he first arrived at the 308 dormitory, his posture was like a towering mountain, he turned around and walked out of the main entrance of the dormitory, and followed Yang Xiaolong and the pick-up attendant Bawang to leave.

The sky was getting clearer, and the wake-up call was gone.

In the open space at the bottom of the building, all the male ordinary flight students gathered in a square line, ready to exercise.