The meaning of a domain was both incredibly vast and utterly simple!
It was a qualitative transformation formed when a New Human's physical energy reached a certain threshold. The initial manifestation was life fluctuations, and in the later stages—after Tier 5—even those with high talent who had no understanding of its essence could unconsciously display it.
After reaching Tier 5, highly gifted New Humans would sense the changes in their physical energy and transform the energy originally sealed within their bodies into something tangible—a sharp blade for battle!
Powerful life fluctuations could exert pressure on an opponent. Once those life fluctuations became tangible, the most direct manifestation was something like what Chu Han was doing now: displaying his own energy externally and forming a controllable area.
In the future, people called this area a domain.
Scientifically speaking, under the premise of releasing life fluctuations, one used those fluctuations to compress or expand the air within a controllable surrounding area. The refraction of light was merely a visual effect, but reaching the extreme density Chu Han had created was a qualitative change.
The size of a domain represented the area one could control. The domain Chu Han displayed at this moment would have been an exceptionally rare and powerful one even in the future, when domains were widely understood.
However, only Chu Han knew all of this right now. In his previous life, the term "domain" had not become widespread until the third year of the apocalypse.
In the world overturned after the apocalypse broke out, everything followed extremely obvious patterns. Yet because of the countless crises and the difficult environment facing all humanity, people subconsciously overlooked those obvious patterns.
In fact, as early as the first year of the Apocalypse Era, when the Assessment Stone Wall had first appeared, many