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

"A Sage from the Purple Sun Realm?" Cui Heng exclaimed softly. He took the book and flipped through it.

This book recorded Ye Han's life according to his age. When Li Mingqiong handed it over, she had already marked a place. Therefore, as soon as he opened it, it was about the Purple Sun Realm's Sage.

A thousand years ago, Ye Han was already more than 2,000 years old. He had even been hunted down by the Plague Imperial Palace for more than a thousand years on the pretext of stealing a Sage Armament and defecting. He was at his most desperate state.

Before meeting the Sage from the Purple Sun Immortal World, he had just dodged a pursuit from the Plague Imperial Palace. He had even used the Thousand Plague Umbrella to destroy the bodies of three Golden Immortals and severely injured a Limitless Golden Immortal.

In the past, when these people saw him, they would respectfully call him Holy Son. Now, they had all come out to participate in the pursuit.

Heavenly Book of Calamity, Strange Madness