All these predictions are based on the characters in the "day" column which determine the basic fortune of ego. Readings in the year, month and hour columns are compared in order to identify whether they generate, dominate or are equal with ego. Predictions are then based on these and other theoretical categories codified in divination texts.
以上這些，都是以生辰八字的日柱（本命柱）為「我」，然後在年、月、時三柱中尋找和「我」相生相剋或同類的各項，再用前面的基礎理論，以及命書上歸納的各條規則進行推斷。