There were actually many secret realms controlled by humans, but Great Xia did not have control over most of the secret realms controlled by humans.
That kind of secret realm was known as a grotto-heaven.
There was another group of cultivators living within. Their ancestors were naturally from Grand Xia as well. However, their thoughts were different from Grand Xia. They followed the ancient system and did not change. The martial arts they cultivated were also martial arts that had been passed down since ancient times.
It was known as the Ancient Martial Arts.
Because the martial arts of Great Xia was the universal version, the difficulty of cultivation was greatly reduced. Naturally, a portion of its power was sacrificed.
Of course, the power of these sacrifices in the early years had long been made up for by the evolution of the thousand years. In fact, it was even more powerful than the original!
