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

Tang Yuanshan listened to his two disciples' doubts and nodded. "You're right. The laws of this Star Sea are indeed extremely thin. From this point of view, it can only be considered an ordinary Star Sea. There's nothing special about it."

"Master, you mean…" Yang Qinghe asked in surprise, "This Star Sea is actually not as simple as it looks?"

"This is normal, right?" Qiu Haitang said at the side. "After all, there's a Xuan Sea Realm expert here. It's not surprising that there's something special about it."

"There are two reasons why the Great Dao laws in this Star Sea are thin," Tang Yuanshan said in a low voice. "One is that most of the laws are already gathered in the central silver disc.

The second is the oppression and refinement of this sea of stars by the Six Heaven Gates Diagram. In the past tens of millions of years, the laws in this sea of stars should have been refined by the Six Heaven Gates Diagram. Now, it has naturally become very thin.

We Have to Be Cautious, Cautious, and More Cautious