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 waves of the River of Time flowed past Cui Heng, but the power of time could no longer bring him decay.

As the shadows retreated rapidly, Cui Heng's perception spread from the current spacetime to Daozhou Star in the past.

In the end, it stopped at the moment he walked out of the Beginner's Space, 400 years ago.

Cui Heng had considered why he chose this time period.

His 300 years in the Beginner's Space were completely blank, as if they did not exist at all.

However, this did not mean that he was completely unable to touch those 300 years.

In fact, Cui Heng had always been able to affect the 300 years period of time and could directly descend over. However, he could only appear outside the Beginner's Space and could not trace the situation in the Beginner's Space at all.

This might cause a very strange outcome.

400 Years Before Leaving the Beginner's Space