After 300 years of cultivating immortals, he suddenly discovered that he was a martial arts man

Cui Heng passed through, and the system told him that this was a high-level immortal world.
Immortal kings are all over the place, fierce beasts are everywhere, and if the powers disagree, they will explode the galaxy, destroy the world, and make him tremble with fear.
Fortunately, in order to protect him, the system provided a 300-year novice protection period. As long as he was in the protected area, he would not be harmed.
Thus, Cui Heng started his 300-year journey of cultivating immortals.
In the past 300 years, people have entered here by mistake one after another.
Some came from humble backgrounds, were monks and beggars, but they had the ambition to pacify the world and save all peoples.
Some were of extraordinary origins and once were peerless geniuses, but suddenly suffered bad luck, their aptitude was greatly reduced, and they suffered from indifference.
Some are noble as princesses, but they just want to find their elder brother, not to become an immortal, but to wait for his return in the red dust.
Some are frail and sickly, but dream of conquering the world, hoeing the strong and helping the weak, and becoming a generation of chivalrous women.
……
Cui Heng, in the spirit of making a good relationship, gave them hundreds of millions of help.
300 years later, the system's novice protection period ended, and Cui Heng finally made his golden core, and walked out with a trembling heart.
But it turns out that this is actually just a martial arts world!