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

What she saw in Juhe County back then had left an extremely deep impression on Xu Bailu.

This was also why she had been determined to cultivate for a hundred years.

Although Cui Heng had never done anything to her, after spending some time with him, Cui Heng's figure was deeply imprinted in her heart.

She would never forget that invincible figure standing on the city wall and summoning the wind and rain.

Every time Xu Bailu felt tired and wanted to relax, she would think of the figure from back then and think of what it would be like to stand in front of him after she broke through.

"Now that I've become a Human Immortal, I wonder if I can get closer to him." Xu Bailu thought to herself. Then, she saw a Daoist priest who looked to be in his fifties or sixties walk over. "Father."

The person who came was Xu Feng'an, the top Inner World expert who had followed Cui Heng a hundred years ago, the Elder of the Yuhua Sword Pavilion.

It Can't Be the Seventh Realm of the Immortal World, Right?