In the vast starry sky, a black warship was speeding through the accelerated space.

"Finally, I'm going home!"

Lin Yun looked up, his bright, starry eyes seeming to see through the warship to the starry sky outside and to the distant Earth, and said softly.

"Yes, we're finally going back!"

Lin Yuanshan and Zhang Haoran stood beside him. Seeing this, Lin Yuanshan nodded slightly and said.

Unbeknownst to them, almost four months had passed since they left Earth.

Including the time to return, their trip is estimated to last more than six months.

This is taking far too long.

Previously, how long had Qingyun Company been developing on Earth?

So much time has passed, I wonder how far Qingyun Company has developed on Earth.

This time, there's no rush to go back.

On their journey, they would stop to collect resources if they encountered a planet that seemed to have abundant resources, and they would also hunt any cosmic beasts that interested them.

...

Lin Yun spent most of his time in seclusion cultivating and didn't care about these things.

No matter what these people do, Yue Yi must stay on the warship; this is Lin Yun's instruction.

Yueyi's strength is already enough to contend with the warships of a level six technological civilization. In case of any danger, she will have time to protect most of the people.

Ten days later.

"boom--"

Lin Yun's cultivation level broke through to the mid-stage of the Golden Core realm.

Twenty days later.

"boom--"

Lin Yun's cultivation level broke through to the late stage of the Golden Core realm.

Martial Arts Room.

"Buzz—"

A peculiar fluctuation emanated from Lin Yun's fists and feet. Lin Yun smiled faintly and said softly, "Another level four martial skill has reached its peak. Now, a total of eighteen level four martial skills have reached their peak..."

Level four martial arts skills are no longer basic, and Lin Yun usually did not use the Cosmic Trading System to directly upgrade them.

Because he discovered something...

Once he learns a level four martial art, his skill level in that level can be rapidly improved.

Level 1 martial arts skills, Level 2 martial arts skills, Level 3 martial arts skills are like the basic strokes in calligraphy, such as horizontal, vertical, left-falling, right-falling, and turning strokes...

A level four martial skill is like a complete font, at most a more complex one.

If you're already extremely proficient in the basics, what's so difficult about writing some complex characters?

Do those great calligraphers really have to write a complicated character poorly?

Perhaps because they have never seen it before, the quality of their writing is not high when they first start, but as long as they write it a few times, the quality will improve rapidly and they can quickly reach their own level.

That's how Lin Yun felt about those level four martial arts techniques.

After he learns them, he only needs to practice them two or three times to improve them to the minor mastery level, and only a dozen or so times to improve them to the major mastery level. At this rate, it won't take long to improve them to the peak level.

Under such circumstances, Lin Yun naturally wouldn't spend a lot of spiritual crystals to improve their realm.

It should be noted that upgrading by spending spirit crystals is not cheap.

A level three martial art requires approximately one thousand spirit crystals to learn at the beginner level.

A level four martial skill, at its initial stage, requires approximately ten thousand spirit crystals.

Reaching the Lesser Completion level requires approximately 100,000 Spirit Crystals, reaching the Greater Completion level requires approximately 1 million Spirit Crystals, and reaching the Peak level requires approximately 10 million Spirit Crystals.

Even if Lin Yun is rich, why would he spend so many spiritual crystals on something that can be improved in less than an hour or a day?

Moreover, Lin Yun had a vague feeling that if certain realms could be improved on one's own, it would be best not to rely on the universe trading system.

Just as Lin Yun had predicted.

After breaking through to the Innate Realm, he improved dozens of level 4 martial arts techniques to the Great Completion Realm in just over a month, and even improved several level 4 martial arts techniques to the Peak Realm.

Now, he has already upgraded eighteen of his fourth-level martial arts techniques to their peak.

Having broken through to the Golden Core Realm, Lin Yun was now able to learn level 5 martial arts techniques.

During this period, Lin Yun learned more than thirty level-five martial arts techniques.

Now, Lin Yun has mastered all thirty-plus level-five martial arts techniques, and three of them have reached their peak.

"Indeed, a solid foundation in martial arts has great benefits; however, it also saves a lot of spiritual crystals..."

Lin Yun sighed slightly.

With daily consumption of various martial arts pills, rare and precious herbs, and the use of various auxiliary devices, Lin Yun's progress was rapid.

Another month has passed.

Lin Yun's body trembled as he broke through to the peak of the Golden Core realm.

"Boom—"

Countless energies of heaven and earth converged from all directions and rapidly surged into Lin Yun's body.

The quantity and quality of the true qi within Lin Yun's dantian increased rapidly.

"Mr. Lin has made another breakthrough..."

"Is this the peak of the Golden Core realm?"

Throughout the warship, martial artists looked up at the place where Lin Yun was in seclusion, expressing their envy.

They've encountered this kind of thing several times in the past two months.

Originally, some of them were enthusiastically collecting resources, capturing cosmic behemoths, or deliberately observing passing low-level civilizations during their space travels...

However, seeing Lin Yun break through one after another, and their companions breaking through one by one, the remaining people gradually gave up their thoughts and began to focus most of their energy on cultivation.

Before the savior Lan, their cultivation levels had all reached the peak of the Innate Realm.

However, breaking through to the Golden Core realm is really difficult.

However, Lin Yun provided them with a great deal of resources.

Even they couldn't express any dissatisfaction with this.

When they set off, Lin Yuanshan and Zhang Haoran, like Lin Yun, had not yet reached the Innate Realm. Lin Yuanshan and Zhang Haoran stayed with them and used the same resources as them, but they broke through to the Innate Realm before them.

This shows that Lin Yuanshan and Zhang Haoran are more talented than them.

Lin Yuanshan and Zhang Haoran have now broken through to the mid-stage of the Golden Core realm for many days.

Lin Yun had already left them far behind.

They...should also try harder...

These people already possessed considerable martial arts talent.

With abundant resources and a determined effort...

One by one, they began to break through.

Now, two months have passed, and apart from Lin Yun, Lin Yuanshan, and Zhang Haoran, only two of the twelve people have not yet broken through to the Golden Core realm.

By this point, the strength of Lin Yun and his group had undergone a dramatic transformation compared to when they left Earth.

Fifteen people, thirteen of whom are at the Golden Core stage.

The remaining two should be able to break through soon.

Lin Yun raised Lin Yuanshan and Zhang Haoran's mental strength to the middle level of the seventh grade, and also raised the mental strength of the other twelve people to the lower level of the seventh grade. He also passed on to them the technology to control the warship of the sixth-level technological civilization.

Now, these people can perfectly control a warship from a level six technological civilization.

However, on the cosmic trading system, even the cheapest warship from a level six technological civilization costs over a billion spirit crystals.

A decent level 6 technological civilization warship requires billions, or even nearly 10 billion, spiritual crystals.

Lin Yun was also considering what class of warship he should buy.

Now, he only has a little over two billion spirit crystals left. If he wants to buy a better warship, he might have to return to Earth to consider it.

He's been away from Earth for so long, those resource-gathering people must have collected a lot of resources by now, right?

Lin Yun thought to himself.

Two months of sailing brought them closer and closer to Earth.

A glimmer of hope arose in Lin Yun's heart.

Martial Arts Room.

Lin Yun began practicing his martial arts skills.

Although the first three realms of martial arts are foundational stages, the fourth and fifth realms do require building a foundation as well.

He has now broken through to the peak of the Golden Core realm.

Next, we need to prepare to break through to the realm of domains.

During this time, he should also hone his level four and level five martial arts skills.

He learned a total of eighty-one level-four martial arts techniques.

Currently, thirty-two sects have reached their peak.

In the following period, Lin Yun began to practice these level four martial arts techniques.

His peak seventh-level mental strength allowed him to comprehend these fourth-level martial arts techniques at an even faster pace.

On the first day, Lin Yun mastered two level-four martial arts techniques to their peak.

The next day, Lin Yun mastered three level-four martial arts techniques to their peak.

Once you master one method, you master all methods. As Lin Yun acquired more and more skills, his comprehension speed increased rapidly.

Half a month later, Lin Yun had mastered all the level four martial arts techniques to their peak.

Of these, only two martial arts techniques were difficult for Lin Yun to master to their peak, and he had to spend spiritual crystals to improve them.

Afterwards, Lin Yun began practicing level five martial arts techniques.

Lin Yun has only recently begun learning level five martial arts techniques, having only mastered about thirty of them. This number is far from sufficient...

Lin Yun was learning new level 5 martial arts techniques while simultaneously improving the level of his old level 5 martial arts techniques.

During this process, his Golden Core peak realm began to slowly advance towards a higher realm.

In the blink of an eye, three months have passed since Lin Yun and Xing Lan parted ways.

At this point, their warship was only two million light-years away from Earth.

"In the future, I will definitely build a space jump station near Earth. That way, I can buy an advanced warship and return quickly, no matter how far away I am..."

Lin Yun sighed.

More than 30 million light-years—even for their Level 5 technological civilization's warship, if using the maximum space jump distance, it would only need to jump 40 or 50 times consecutively.

However, the voyage took more than three months, which was too time-consuming.

"Beep beep beep—"

Just when their warship was only one million light-years away from Earth, a series of alarm messages suddenly came through.

"Um?"

Lin Yun's heart skipped a beat.

This message came from Earth.

Could it be that something happened on Earth while they were away?

There are two major crises facing Earth. Which one is it, and when did it occur?

"Quick! Full speed ahead!"

Lin Yun immediately teleported to the core control room, looked at the screens in front of him, and shouted.

"Mr. Lin, what exactly happened?"

"Mr. Lin, what happened?"

Has something changed on Earth?

whoosh—whoosh—whoosh—

At this moment, others also rushed over and, seeing this scene, all said nervously.

They had heard the alarm just now, and they all knew that the alarm came from Earth.