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 had left a Nine Fire Flame Dragon in the Lower World.

That was essentially an extension of his perception. If anything happened in the Lower World, he would be able to sense it immediately.

Just now, he sensed that Huo San had been awakened by He Qingrou in the Lower World to ask about the strange starlight falling from the sky.

"Strange starlight descended from the sky." Cui Heng pondered for a moment and thought to himself, "Perhaps it's just an ordinary phenomenon, but it's also possible that a guest from the outer world has really descended. It's even possible that it's someone from Chongyang Star."

6,700 years ago, Divine Lord Tianhe killed a Half-step Golden Immortal called Li Fa on Tianzhu Star.

Unexpectedly, Li Fa's background was extraordinary. There was even a Sage behind him who had left a mark on him that could track his location.

The Nine Deaths Heavenly Sect on Chongyang Star was Li Fa's sect.

This Outsider Is Too Cautious