rest?

No!

Ye Fan dared not rest.

He worked for nearly forty hours in a row, and at this moment, he knew his physical condition very well.

You must not relax your breath, otherwise you will be finished after a sleep!

After washing his face with ice water, Ye Fan felt much better. He picked up the food that had already cooled off on the homework table and took a few bites.

While eating, he took out his cell phone.

When he saw the WeChat message sent by Ning Xi, a smile rose on his face.

"Brother, remember to eat on time."

"Don't work too hard, Xiaoxi stays at home for two days before going back."

"Brother, mom won't let Xiaoxi go..."

…

There are nearly a hundred unread messages, and Ye Fan carefully read them one by one.

Do you want to reply?

never mind!

Ye Fan shook his head, came to the round table in the center of the laboratory, picked up the only document on the table, and looked quite solemn: "It's finally you."

The last technical barrier is called air drive!

Without this technology, the x-18 hypersonic intercontinental missile could not have reached a speed of nearly Mach 50.

At present, the driving technology mastered by Xia Guo can only support the missile to reach a speed of Mach 22 at most, and Mach 30 is still under development.

As far as Ye Fan knows, the development base of the x-17 hypersonic missile has made little progress in driving technology.

In fact, this situation seemed very normal to him.

When the speed reaches the speed of sound, the power and profits paid are not proportional to the rate of sound at all.

The limits of known missile drive technology, Mach 25!

It's double the difference from Mach fifty!

It is not because of the poor level of scientific and technological personnel, but because of resource limitations. The resources currently mastered by humans can only allow missiles to reach this speed.

Maybe it can be no matter how fast it is, but even if it improves, it is extremely limited.

There are only two ways to change this situation.

Either use new power fuel or find another way to break the limits.

Ye Fan chose the second method.

Find a different approach!

The difficulty I face now is how to solve it...

Ye Fan had already had a rough prototype for this.

Since you are flying in the air, the biggest reliance is air.

Drive with air!

Of course, you can only be passive. After all, air is not fuel and it is uncontrollable.

What Ye Fan has to do is to magnify this passively and infinitely!

A tingling sensation came in his mind, but it did not affect his right hand holding the pen at all, and he drew a picture of the bullet-body transformation on the draft paper, stroke by stroke.

Time passed by minute by minute, and it was already past nine o'clock in the morning before I knew it.

Yu Yefan said that he only felt that only a few minutes had passed.

At some point, a girl appeared at the door of the laboratory. She was wearing a white T-shirt and light-colored jeans.

Who else can be there if it’s not Ningxi?

In fact, Ning Xi had long wanted to come to the base, but she couldn't stand her mother's soft and hard work, so she stayed at home for nearly a week.

Before going to bed last night, I received a text message from Nan Xing, saying that Ye Fan had been in touch for thirty or forty hours without rest. She couldn't persuade her and hoped that Ning Xi could come to the base to persuade her.

When Ning Xi saw this news, she almost came to the base overnight, but as soon as she pulled her luggage, she was hit by her father when she was knocked to the living room.

When she learned that she was going to the base, Ning Xiangtian stood at the exit of the living room with expressionless face.

"Go back to sleep and go again tomorrow morning."

It is because of this that Ning Xi came late.

She came to Ye Fan gently, looking at the sketches covered on the table and the sweat on Ye Fan's neck; her heart was sore.

"Bad guy!"

"Don't keep your word!"

"Do you want to feel sorry for Xiaoxi?"

"Son of a bitch!"

"You...woo~"

The moment Ning Xi's voice came to his ears, Ye Fan was stunned, and then a series of complaints came, which made him sure that he was not hallucinating.

Without any hesitation, he quickly got up and hugged Ning Xi's slender waist, lowered his head and kissed the coveting red lips.

Ning Xi supported Ye Fan's chest with both hands. After she wanted to struggle, she slowly softened her body after seeing the red bloodshots in Ye Fan's eyes, her eyes slowly closed and let Ye Fan ask for it.

It was not until her face turned red that Ye Fan reluctantly let go.

"Do you know how to come back?"

"Do you know how much I miss you recently?"

"Little guy, really has no conscience!"

…

Ning Xi's face was full of surprise.

Shouldn't she complain?

Why have the roles changed?

After being stunned for a while, she realized and stared at her eyes angrily, "Brother, don't mess around, first talk about why you worked continuously at high intensity. Sister Nanxing said that you haven't slept for nearly forty hours. Is this true?"

"yes."

Ye Fan nodded and admitted, picked up his phone and looked at the time, correcting: "To be precise, it should be forty-eight hours, and the air drive has not been completed, so it is estimated that it will take more than ten hours to be busy."

"You, you..."

Ning Xi's eyes turned red, and the next second, tears burst out and shedded her eyes and slid down her face.

Ye Fan was immediately panicked and hurriedly wiped the tears from Ning Xi's face with his cuffs, "Don't cry, don't cry, I was wrong."

"Xiao Xi, listen to my explanation."

"Don't listen!"

Ning Xi opened Ye Fan's hand, took two steps back, and his voice became cold: "Since my brother doesn't cherish his body so much, Xiao Xi also did it."

After saying that, he turned around and left.

Ye Fan naturally couldn't let Ning Xi leave, otherwise she would definitely do something stupid in her current state.

He intercepted Ning Xi at a speed of 100 meters and supported his hands on both sides of the door frame.

Ning Xi had a cold face, "Get out of the way!"

"Don't let."

Ye Fan shook his head and explained with a bitter face: "Xiao Xi, the reason why I work continuously is due to helplessness."

"have no choice?"

Ning Xi took a deep breath and tried to stabilize her emotions. "Brother, don't try to deceive Xiaoxi. I know that the x-18 hypersonic intercontinental missile is very important to the country, and I also know the strategic significance of this weapon."

"But there is no war now, what does it matter if it is sooner or later?"

Ye Fan smacked his lips, not knowing what to say.

In fact, Ning Xi is right. Although the x-18 hypersonic intercontinental missile is very important, there is no war at this moment, and there is even no sign of war.

Even if the relationship with Xueyang Kingdom is relatively tense, it will not be able to use force in a short period of time.

There is indeed no difference between the development of the x-18 hypersonic intercontinental missile a few days earlier or later.

Thinking of this, Ye Fan felt helpless.

If it weren't for Lan Ying's bastard's confidence that peaked, and he had to complete the technical development of the x-18 hypersonic intercontinental missile in one month, how could this happen?

Confidence is the peak?

Now it turns into confidence and crazy!

Lan Ying caught Ye Fan's thoughts and protested directly: "Hey, hey, what kind of bastard is it? The host scolds me again, and I will deduct your merit points."

Ye Fan's mouth twitched.

But now he has no intention of paying attention to Lan Ying, and the most important thing is to coax Ning Xi well.

Seeing Ye Fan being silent, Ning Xi's expression became even colder, "I have nothing to say? Or are you thinking of using some lie to fool me?"

"I……"
Chapter completed!