One of the most important qualities that any organism needs for survival is suction, and it is one of the core practices of the Taoist Inner Alchemy to develop and enhance this ability.
This may sound like a strange statement to you but consider the fact that breathing is suction.
However, as well as sucking air, we also suck in energy, or at least that’s what we are designed to do.
With proper training, every energy point around the microcosmic orbit as well as soles of the feet and palms of the hand. is a capable of sucking energy.
More broadly speaking, as an organism we have a very sophisticated operating system that has the primary functions of absorption, assimilation and elimination of energy.