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 strength of the Great Dao laws of the universe was related to the size of the universe itself.

This volume was not only about the breadth of space and the thickness of matter, but also the depth of time.

Although the progress of some universes that had been expanding since they were born was actually unified, there were actually many universes or worlds that had space and matter fixed from the day they were born.

However, regardless of whether these three factors were unified or not, generally speaking, the larger the universe, and the longer it'd existed, the stronger the Great Dao laws will be.

The universe Cui Heng was in now could be said to be ordinary in terms of space, matter, and time. It was an inconspicuous universe.

This kind of universe was usually located at the edge and outer layer of the Boundless Chaos Universe. It was the "youngest" border universe. There were very few experts at the Grand Primordium realm. It was very weak.

The Real Purpose of Emperor Wu