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

"I don't know." The blurry face shook his head and said, "That is too far away for me. I only heard Beginning mention it not long after I was born. After saying so much, you should know that the path to the foreign realm won't be dangerous to you. It can even allow you to surpass the limits of this world. It can be said to be a great fortune. Can you help me?"

"I won't help you." Cui Heng shook his head very simply and said, "Most of this stuff is just your words. I can't believe it.

Moreover, you have a misunderstanding about my cultivation path. My subsequent improvements will not be affected by the upper limit of this world's cultivation."

The process of cultivators breaking through from the Peak Soul Formation realm to the Return to Void realm was to evolve 3,000 Great Dao and 480 million laws. This was the foundation of forming a world.

Is It the Foreign Realm or My Homeland? (2)