At the conceptual level, the Murim World had changed.
This was what Compass Carburettor understood after observing the state of things for thirty years. Originally, the people of the Murim World were born with Dantians.
This was the most basic concept of a Murim World—Dantian.
Without a Dantian, a Martial Artist couldn't exist. Even though they were all humans, those on Earth didn't possess a Dantian. Thereby, they couldn't accumulate internal energy or Qi.
Whether it was a human or any other race living in the Murim World, they all possessed a Dantian. Of course, some were born with defective Dantians or shattered Dantians like Rass. But everyone possessed one, including animals.
There was Qi in every living being, including minerals. For Martial Artists to cultivate and develop, they needed to ingest items rich in Qi to develop their internal energy.