When it comes to Qi, the same pronouncement contains two distinctive Chinese words, one is body energy”氣”, another is mental energy”炁”.
Traditionally there are lots of misinterpretations, including Dan Tien, a Taoist alchemist term literally the field of the elixir of life, the whereabouts of the beginning of life animation.
In accord with Chinese tradition, people made too much fuss over this term by using the mental intellect to interpret the connotation of the term.
If to modify the connotations, and replace Dan Tien”丹田” with energy center, then it will make a better sense.
The energy center of the body “健氣” is at the abdomen where digestive function locates. Food energy is that which nourishes the healthy body mechanism.
The energy center of the mind “意氣” is located at the head, the stove for the flaming mind.
The energy center of the conscious presence “元氣” is located at the heart, the energy that derives from the Primal energy prior to the animated sentience.
Those three energy centers, conceptually different, yet in actuality, they are intrinsically One temporal energy animated through the Primal energy in animation with the veiling of sentience.