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 was slightly stunned when he saw the young woman. Then, he smiled and said, "Why is Pavilion Master Jiang here?"

This woman was none other than the current head of the Vast Water Sword Pavilion, Jiang Caiyun, who was famous in the southern part of the Great Zhou Dynasty. She was just over a hundred years old and had already reached the Heaven Monarch Realm.

Under the long and stable rules of order, the Great Zhou had already completed their overall rule of Purple Sun Star.

In order to make it easier to manage, the entire planet was divided into four regions. Every region was divided into more than a hundred states. Moreover, from the Fourth Realm of the Immortal World onwards, the Imperial Court would arrange special cultivation places and would not easily step into the mortal world.

This formed the situation where a Heaven Monarch was the peak of a state.

Life Is Tough, A Hundred Years Is A Short Period Of Time