The Yellow Court (Huangting)
The Yellow Court (huangting), symbolic center of the human being.
The phrase in the inner circle reads "Spirit of the Center." The other phrases read (clockwise from the top): "Yellow Court," "Gate of the Meaning of the Dao," "Empty Non-being," "Gate of All Wonders," "Great Ultimate," "Gate of the Mysterious-Female," "True Emptiness," "Gate of the Non-dual Doctrine."
Source: Liu Yiming, Huangting jing jie (Explication of the Scripture of the Yellow Court).