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

In Cui Heng's perception, the illusory figure was wandering around the River of Time, stopping from time to time.

He observed the location of the illusory figure and realized that there were relatively obvious changes in time in these places.

"It's looking for a place where the flow of time is abnormal."

Cui Heng quickly made a judgment in his heart, and then a strange expression appeared on his face. "It's still a Quasi Immortal Emperor from the Primordial World. Could it be looking for clues of me hiding the traces of that universe?"

If that was really the case, then this illusory figure would only waste its effort.

The effect of the Eon Light Evasion spell was extremely powerful. Even if his cultivation had not reached half of the Early-stage Void Return realm, it was enough to hide from the perception of an Immortal Emperor.

Mid-stage Return to Void Realm, Standing In the Present, Influencing the Past!