Sole Cloud Flying Cave

Cui Heng was transmigrated to another world and the system told him that the new world he was in was a high-grade Xianxia world.
It was a world where Celestial Kings soared the sky and terrifying monsters ruled the lands. The strong would destroy a planet if their mood was bad and Cui Heng trembled in fear when he learned of how scary the new world was.
Thankfully, the system had granted him the protection that last for 300 years. As long as he remained in the safety zone, he would not receive any damage.
With his safety secured, he began his cultivation training for the next 300 years.
Throughout the years as he trained, some people entered his safety zone by mistake.
There was a peasant who was once a monk and a beggar. Despite that, he still had the dream of bringing peace to the land and saving the lives of millions.
There was a noble who was once called the once-in-a-million-year genius. Yet, luck wasn't at his side and his talent fell and was laughed at by others for years.
There was a princess whose only wish was to find her older brother. She could've become a celestial but decided to remain in the human realm to wait for her brother's return.
There was a weak lady who was plagued with illness from birth but had the goal of adventuring and helping the poor and weak.
...
Cui Heng befriended these people and even gave them a few pointers before they left.
300 years later, when the protection period had ended, he had finally mastered the Golden Core. Even then, he was still reluctant to go to the outside world.
But when he did, he realized that the world was merely a world of Wuxia.

Realizing This Is A Wuxia World After Cultivating For 300 Years

Cui Heng was driving the flying ship he had refined.

However, it had been adjusted to become only three miles long and less than a mile tall. It did not maintain its original size.

After all, this was a Dharma treasure that was equivalent to the Nascent Soul realm. It was very easy to change the size.

He had to keep a low profile when he was outside.

Unlike Cui Heng and Li Cheng, who had already experienced space travel, Hui Shi and Pei Qingshu were leaving the planet for the first time.

They could not suppress the excitement in their hearts.

"Master, with my current physical strength, I should be able to walk directly in the starry sky of the universe, right?" Pei Qingshu asked Cui Heng.

That was because this determined how he would fight in the future.

If the strength of his body was enough to directly walk in the universe, he could fight from the ground to the void of the universe.

The Dao Is Endless, There's Only Endless Exploration