On the Purity and Mixture of the Useful God (Yong Shen Chun Za)

Pure and Mixed: Two Gods Revealed Together

Once the useful god can change, a further division opens inside the change: pure and mixed. Two gods are pure when each serves the other — wealth and officer generating each other, or killings and food god checking each other in the right place. They are mixed when two revealed gods do not work together, as when the wounding officer meets the officer or wealth checks the seal. The pure is auspicious and the mixed is not, and the first question to ask is simply how the two stand to each other.