Yang qi, opposite to yin qi, generally refers to one of the two components that are opposite and complementary to each other. In terms of function and form, yang qi is function. In terms of visceral activity, it is qi of six fu-organs. In terms of nutrient qi and defense qi, it refers to the latter. In terms of the direction and nature of movement, it tends to be outward, upward, exuberant, intensive, and light. In short, yang qi is involved in functions of warming, generating, transforming, and protecting.