"In order to understand the Chinese view of xin, emotions, qi (energy) flow and health…."
http://www.academicjournals.org/app/webroot/article/article1379496939_Li%20et%20al.pdf
"and heart).
According to Chinese medicine theory, emotional
imbalance is a main cause of illness and disease
because it disrupts the flow of qi. McCaffrey and Fowler
(2003) state the Chinese identify qi as “the natural energy
intrinsic to all things that exist in the universe”, as the
fundamental life energy responsible for health and vitality.
In order to understand the Chinese view of xin, emotions, qi (energy) flow and health, a brief explanation of qi is necessary in this section, as Chinese medicine theory is based on the concept of qi (Maciocia, 2005)."
God Bless You Swordy