Qi, blood and body fluids are precious substances for normal life activities and excessive draining of the body’s fundamental substances will substantially affect health. Jing in particular can “leak” from the body through stress, excessive behavior, hard living, lack of nourishment and rest, excessive sexual activity relative to one’s capacity, overwork and so on. One of the first principles of traditional Asian healthcare, Taoist health practice and tonic herbalism is to stop “leaking” from occurring and restoring the energy that has been lost.