Martial grandmasters were also distinguished by how strong or weak they were.
The most important factor in distinguishing the strength of a martial grandmaster was the number of their apertures that could be linked with the sky and earth.
The more apertures one could link with their surroundings, the more power they could absorb from the surrounding environment, so the stronger they would be.
However, these apertures were the dividing line between martial masters and martial grandmasters. To many people, they were barriers that were very hard to destroy.
Actually, many martial grandmasters were only able to break through one aperture in their lifetime.
According to Martial God Luo Kai's theory, there were countless apertures within the human body, so it was simply impossible to open up one's every aperture. Even if only six were used, there was still hope of becoming a god-grade entity.
