The chart below shows the analogous relationships between the Xu Xing and Zang-fu organs.
xu [[File:Xu xing and zang fun comparisontable.png]]
The purpose of the Zang-fu Organs is to produce the Five Vital Substances, which are the five building blocks of life: Qi, Xue (Blood), Jinye (Body Fluids), Jing (Essence), and Shen (Spirit).