"Not brother, who the hell are you!"

At that moment, A Zhuang couldn't hold back any longer, squinting at the inexplicable man in front of him.

Where had this guy come from?

He'd never seen him before!

Yet, from the moment he appeared, he was relaxed and at ease, perfectly blending into the environment, with a sense of ease as if he were in his own home.

This made A Zhuang lose his confidence for a moment, wondering for a long time who this person was.

Then.

This guy first called Brother Lian his brother, then joked with Er Zhuzi in a very natural way, and just now he was even chatting and laughing with Li Ningning as if they had a great relationship!

Okay, he could tolerate that. There were many people in this world who were naturally sociable, acting as if they were at home wherever they went.

But now he was taking things too far, acting as if it were only natural, with an expression that said, "How could you do this without calling me?" and reaching out for the equipment.

"This isn't a game, it's life-threatening! Besides, can you even skydive?"

"Of course, I can."

Lin Xian replied:

"Of course, I know the danger, but our Lian Gang has never had anyone afraid of death."

"Who who who said 'our'!"

A Zhuang looked at Lin Xian suspiciously:

"Do you even know what we're going to do?"

"I know, isn't it just high-altitude skydiving into Rhein Sky City to find medicine to prevent or treat radiation sickness? Don't worry, I have experience with wingsuit flying from a height of 20,000 meters."

Lin Xian started bragging.

When he was playing the wildest in the dream, it was only wingsuit skydiving from a few thousand meters, and the highest was no more than 10,000 meters.

It wasn't that he didn't dare.

The main reason was that he couldn't find such an opportunity in the dream... After all, the First Dream was also a real future world 600 years later. Where could he find such a super high-altitude skydiving opportunity, except for those people sponsored by Red Bull with "I'll pay the money, you risk your life"?

Even if he entered the dream at the earliest time every day, he could only stay in the dream for 12 hours. Overly complex actions and plans simply didn't have enough time to implement.

"Think carefully."

A Zhuang instructed:

"You saw what happened to Brother Lian just now. A slight deviation, as long as you touch the area outside the gap in the anti-aircraft network, you will be immediately targeted by lasers and instantly evaporated."

"And once this helium balloon enters an altitude of 20,000 meters, it is impossible to descend again. It will continue to rise until it enters outer space and explodes. So, if you want to give up halfway, there's no turning back."

"Don't worry, don't worry."

Lin Xian urged A Zhuang to hurry up.

He just looked at his watch, and it was already past 11 pm.

The hot air balloon rises very slowly, plus the preparation time and the skydiving time, even if he was lucky enough to successfully enter Sky City, there wouldn't be much time to explore. He had to hurry.

Soon.

Several women brought Lin Xian a complete set of skydiving equipment and a handmade spacesuit.

These things themselves were not scarce.

What was truly scarce... was human life.

Now, in the villages surviving on the East Sea side, except for the old, weak, sick, and women, only the three men present were left.

After these men all failed and sacrificed...

Then these women would have to start learning and training skydiving skills, and then, after they became skilled, they would have to take the same risks as the men who had sacrificed.

This was what they had to do.

Without medicine to treat radiation sickness, the next to sit and wait for death would be their parents, their children.

No one could escape.

"Listen carefully, Lin Xian."

While A Zhuang helped Lin Xian put on the heavy spacesuit, he explained to him:

"Our target is above the square in the northwest district. Over the years, the only time we successfully avoided the anti-aircraft laser was above this area. Therefore, there must be a gap in this location, and this is the only safe place."

Lin Xian looked at the map with a red circle drawn on it:

"The area of this square doesn't look small, is this gap that big?"

"No."

A Zhuang shook his head:

"We don't know exactly where the gap is, because... no one has ever come back alive. Based on the evaporation locations of those who died before, we have only ruled out the possibility of a gap in the northeast and southeast directions being unlikely."

"But this information may not be accurate. No one knows how big the area of that gap is. So... we can only try. I suggest that we both fly towards the northwest direction. If we both die there, at least Er Zhuzi and San Pang behind us can choose to break through in the southwest direction... This will increase the success rate."

"Okay."

Lin Xian agreed directly.

As he had expected, the location of the gap, and the locations that were not the gap, were all information accumulated from countless lives and countless attempts.

The probability of his success today was also very small.

But it didn't matter...

This infinitely looping dream was a natural testing ground for him.

He could clearly remember the location of each death, and then avoid it next time.

As long as he tried enough times.

One day, he would be able to successfully land inside Rhein Sky City.

This was his biggest advantage in the dream.

Countless attempts, even if the original probability was only 1%, would eventually be magnified to 100%.

"Get ready, we're taking off!"

With the cutting of the cable.

With a stagger, the helium balloon pulled the manned basket, carrying Lin Xian and A Zhuang, slowly rising into the night.

This was the first time Lin Xian had ever ridden in a hot air balloon, and it was very novel.

Before, even when skydiving and wingsuit flying in the dream, he had taken a skydiving plane to ascend.

The hot air balloon rose faster than Lin Xian thought, and it was getting faster and faster.

As the altitude increased.

The wind also became stronger and stronger, blowing the helium balloon away from Sky City.

This was the predicted wind direction from the beginning.

Invading Sky City was not something that could be done every day.

The weather and wind direction were very important.

It didn't matter if the hot air balloon drifted a little away from Sky City. He could just glide more horizontally when the time came.

But if the wind direction blew the hot air balloon towards Sky City...

It was very likely that they would touch the anti-aircraft laser area before reaching a safe altitude and gg directly.

Gradually.

Lin Xian's hot air balloon climbed higher and higher.

The crowd on the ground became a small speck of light.

The air also became cold and biting, and ice mist began to appear on the helmet goggles.

Fortunately, Lin Xian and A Zhuang both had oxygen tanks on their backs, the spacesuits were sealed, and there were no problems with the internal air pressure and oxygen content. The temperature was not very noticeable either.

The view from a hot air balloon was similar to that from an airplane.

There was a period of time when they were not in the clouds, the surrounding clouds were very thick, and nothing could be seen around them, nor below them.

But once they reached a certain altitude, the view would suddenly become clear, and the clouds below would become clear instead, and they could see the lights on the ground.

Lin Xian glanced at the altimeter next to him.

The current altitude was already 15,000 meters.

The temperature was minus 37 degrees Celsius.

Looking upwards... the sky was hazy, the moonlight was very bright, and it could be seen that there were still some thin clouds above.

Lin Xian had heard that if you looked up at an altitude of more than 30,000 meters, you could see the dark space.

He once doubted this.

After all, an altitude of more than 30,000 meters was only in the stratosphere of the atmosphere, and this altitude was still far from space.

But... facts speak louder than words.

He had watched many extreme sports videos, including those high-altitude skydives above 30,000 meters. When the helium balloon rose, it was still a sunny day, but once the altitude rose to 30,000 meters, the background would indeed turn into dark space.

Was it because the atmosphere was too thin?

Lin Xian had not studied it carefully.

If he had this opportunity, he would really like to stand at an altitude of more than 30,000 meters and look up at the universe, to see if he could really see the curved outline of the earth and see the dark space.

After a while...

The altimeter showed that the height of the helium balloon had reached 17,000 meters.

This altitude had exceeded the flight altitude of all civilian airliners, the temperature had approached minus 50 degrees Celsius, and the atmospheric pressure had dropped to one-tenth of the surface.

No living thing on Earth could survive at this altitude. This was a restricted area for life.

Not to mention the temperature, just breathing normally was a luxury.

Above his head, even though A Zhuang had been venting the helium balloon, it had still expanded to an extremely terrifying size.

Pressure, something that people usually don't realize exists, could easily become a force that destroys life in certain situations.

Finally!

The altitude rose to nearly 20,000 meters!

A Zhuang patted Lin Xian's helmet, signaling him to look down—

The lights and neon of Rhein Sky City were clearly visible below.

This was truly a highly developed city...

The traffic flowed like continuous lines, like fireflies shuttling up and down the city.

Following A Zhuang's instructions, Lin Xian locked onto the location of the central square.

Too... too small...

Looking down from an altitude of 20,000 meters, the lights of the square were only the size of a fingernail, but it was still a flying direction reference point.

Lin Xian responded to A Zhuang with a clear gesture.

Then, A Zhuang waved to Lin Xian and jumped!

Whoosh!

Under the action of gravity, A Zhuang began to freefall. He had obviously practiced for a long time and stabilized his body almost instantly, spread his body flat, and began to glide forward, and in the blink of an eye, he had pulled away hundreds of meters.

Lin Xian also followed closely and jumped!

Whoosh whoosh whoosh whoosh whoosh whoosh whoosh!

The biting wind whistled past.

After a brief feeling of weightlessness, the lift and friction brought by air resistance made Lin Xian feel a push upwards.

He did not rush to spread his body flat like A Zhuang, but instead kept his whole body in a dive, accelerating his descent.

He planned to catch up with A Zhuang's altitude first, and then keep a certain distance behind him.

Lin Xian's wingsuit flying skills were still good.

The ability to freely control gliding posture and speed was just basic skills.

Galileo did an experiment on the Leaning Tower of Pisa, dropping two balls of unequal mass at the same time, and they landed at the same time, thus overturning Aristotle's theory.

Therefore...

Many people may think that in the case of freefall in the air, it is impossible for a person who jumps from an airplane later to catch up with a person who jumps from an airplane earlier.

In fact, this theory is wrong.

Everyone who plays extreme sports knows that humans are not the same as iron balls, and different body postures will greatly affect the falling speed.

And... because air resistance will increase with the increase of falling speed, when a person falls from a high altitude, as long as the height is sufficient, they will eventually reach a mechanical balance, thus changing from accelerating falling to uniform falling, and the speed will no longer increase.

This final speed is called the terminal velocity.

Generally speaking, the terminal velocity of women with average weight is about 50 meters per second; while the terminal velocity of men with average weight is about 90 meters per second.

That's right.

Although it may be counterintuitive.

But in fact, the terminal velocity of a heavier person is much faster than that of a lighter person.

And if the posture is extremely graceful and other conditions are perfect, the human freefall terminal velocity can even reach more than 300 meters per second.

Soon.

Lin Xian's falling altitude and speed had caught up with A Zhuang, who had jumped down earlier. The two maintained a fixed distance and descended rapidly, gliding towards the square in the northwest district of Rhein Sky City.

Closer.

Closer!

Ice slag began to condense on the goggles.

Even through the helmet, you could feel the whistling of the cold wind in the high-speed descent!

Although there were still ten thousand meters between them and the ground of Sky City, the visual approximation in the rapid descent was still very tense.

Soon... it was time to draw the lottery.

Lin Xian deliberately leaned to the right side of the square. He planned to start looking for the invisible anti-aircraft network "gap" from right to left.

If he died in this battle, then when he came again tomorrow, he would lean a little to the left; if he still died, then he would lean a little to the left the day after tomorrow...

Eliminate a little bit at a time, and one day he would be able to find the correct location of the gap.

Lin Xian stared at the approaching Rhein Sky City through the spacesuit helmet.

What...

Was hidden inside?