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

At this moment, Tianmen Star had already become a sea of fire.

The sky was burning, the ground was burning, and even the seawater was burning. A large amount of heat rose into the sky, accompanied by a hurricane that swept through the world.

The entire planet seemed to have entered an apocalyptic state.

The continent that Pei Qingshu had raised to smash at Chen Tang had already fallen onto this planet, shattering the place it landed on. There was even a huge crack thousands of meters deep that spread to half the planet.

If one looked down from the sky, they would feel that Tianmen Star had already been smashed open and was about to be destroyed.

When Cui Heng landed, he happened to see this scene.

At this moment, the temperature on this planet had already become extremely high, and the seawater had also evaporated. After the battle between Pei Qingshu and Chen Tang, the originally ruined Tianmen Star had completely become a dead planet.

True Restoration, The Reappearance of the Tianmen Star Civilization