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

As Cui Heng evolved the 480 million laws, all the laws in the entire universe, even the Origin Great Daos, were triggered, revealing countless phenomena. There were scenes of chaos surging, the creation of the Primordial Chaos, the birth of the universe, the destruction of the world, the cycle of life and death, the changes of the five elements, the starlight turning into a sea, the Golden Crow glorious sun, the Karmic Fire burning the Heavens, the Golden Lotus of the Sea of Bitterness, and so on.

These were all natural phenomena caused by the evolution of laws.

At this moment, no matter where one was in this universe, they could clearly see these phenomena and feel the fearsome power contained in them.

The appearance of these phenomena also allowed this universe to quickly expand outwards. It quickly absorbed the Chaotic Qi in the Chaos Sea and transformed it into its own body, making space, matter, laws, and so on more abundant.

Soul Refinement, Observing Primordial Chaos Like a Sea of Bitterness, Under the River of Time, the Heartless Heavens Are Everlasting (2)