from Wiki....
In the Sinosphere, qi (/ˈtʃiː/ CHEE)[note 1] is traditionally believed to be a vital force part of all living entities. Literally meaning 'vapor', 'air', or 'breath',[2] the word qi is polysemous, often translated as 'vital energy', 'vital force', 'material energy', or simply 'energy'.[3] Qi is also a concept in traditional Chinese medicine and in Chinese martial arts. The attempt to cultivate and balance qi is called qigong.
Believers in qi describe it as a vital force, with one's good health requiring its flow to be unimpeded. Qi is a pseudoscientific concept,[4][failed verification][5] and does not correspond to the concept of energy as used in the physical sciences,[6][7][8] with the notion of vital force itself being abandoned by the scientific community.[9]
Chinese gods and immortals, especially anthropomorphic gods, are sometimes thought to have qi and be a reflection of the microcosm of qi in humans, both having qi that can concentrate in certain body parts.[10]
my own take.... "magic" generally refers to things/powers/events that primitive people cannot define or scientists say is impossible. (again, my take) In this context it is easy to describe Chi as "Magic", yet it could very easily be considered "Natural" or, with a nod to Stan Lee & Co. "Mutant" (in that people with extraordinary Chi were actually mutants and that was the word used to describe people's extraordinary powers...)