Chinese tattoo-qi

Qi, pronounced “chee”, means energy. You may see it spelled “Chi” or even “Ki” in Japanese, but they all carry the same meaning. Qi is the energy of the body, of the meridians, of food, of the universe. While it may seem a nebulous topic there are refined theories regarding the different types of Qi within the body, the creation and actions of Qi and, consequently, ways to determine where imbalances may arise.
Generally speaking, Qi is an essential substance that is full of vigor and flows fast. Blood is the red liquid circulating in the vessels and nourishing the whole body, and Body Fluids are a general term for all the water necessary for life. Qi is attributed to Yang, because it is mobile and functions to move and warm; while the Blood and Body Fluids are attributed to Yin because they are motionless and function to nourish and moisten the human body. In this sense, Qi is also named Yang Qi and the Blood and Body Fluids, Yin Fluids of the body.