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

Xie Beixing was very confident in his attack on Lu County.

500 Tendon Transformation elite soldiers, 500 Qi Condensation elite soldiers, 1,500 elite soldiers who had been trained well, and nearly 30,000 soldiers recruited by various merchants, sects, and families. When gathered, they were enough to sweep through the world.

Leading such a force to attack a small Lu County city should have been very easy. It should not be difficult.

After all, the difficulty in attacking a city was nothing more than the fact that the thick city walls were indestructible. However, as long as two top-notch Inner World experts worked together, there was a chance of directly jumping over the 50 to 60 feet tall city wall and charging in, opening the city gate in an extremely short period of time.

Even if they encountered top Inner World experts guarding the city, they could cooperate and retreat safely before waiting for an opportunity to enter the city again.

Immortal God's Power, A Stroke That Moves Mountains and Rivers (1)