Fei Chen possessed a natural physique called the Vast Silver Yellow Sand Physique. It was an earth-based constitution that granted him a sturdy body while also amplifying his spiritual sense and overall perception.
His physique released invisible, tiny particles that dissolved within a certain radius around him, enhancing his perception throughout the area they permeated. The radius matched the range of his spiritual sense, though it wasn't strictly limited, as the particles could be carried by the wind. Even beyond the boundary of his spiritual sense, he could still vaguely sense whatever his particles interacted with or dissolved into. These particles dissolved in the air, ground, water, and even spiritual qi itself.
