There are three theoretical foundation of feng shui in general that Qi (ch'i), Polarity, and Bagua. Chi is the energy that moves either positive or negative energy. Chi is usually associated with age, the interaction with the surrounding environment, the orientation of a structure and a few others. While the polarity is symbolized by the yin and yang where it is two parts attract each other. One section provides the power and the other receiving the power. This theory later developed into the theory of five elements. And the last Feng shui theory is the bagua. Bagua is a theory of the cardinal points. Ideas & Inspirations.