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

The Battle of Cangcheng Mountain's Immortal Dawn Sect?

Zhang Shuming was surprised when he heard this. Many thoughts flashed through his mind, and he quickly linked Cui Heng to Perfected Hengxia, who had appeared a hundred years ago.

Suddenly, he seemed to have realized something, and a trace of shock appeared in his eyes.

However, he quickly suppressed this emotion.

Then, Zhang Shuming took a deep breath and said, "Exalted Immortal, you're right. I did witness the battle of the Cangcheng Mountain's Immortal Dawn Sect a hundred years ago.

"At that time, an Earth Immortal Patriarch of our sect decided to go to the Immortal Dawn Sect to stop the battle. I was one of the two Dao children who accompanied him. However, before the patriarch could arrive at Cangcheng Mountain, a battle erupted."

"An Earth Immortal Patriarch?" Cui Heng discovered a key point and said in surprise, "Your Daoyi Palace still has Earth Immortals in this world?"

The Battle A Hundred Years Ago