Life force, energy, breath, fluidum; central concept of Daoism and Chinese culture, which still shapes the world view of many people today. Alternative spellings: ch’i (China), ki (Japan) or gi (Korea).
In traditional Chinese culture qi is believed to be a vital force within every living being and must flow unhindered. Therefore qi is the central basic principle of traditional Chinese medicine and also plays an important role in Chinese martial arts. The practice of cultivating and balancing qi is called Qigong.
Read more: https://en.wikipedia.org/wiki/Qi