When a person reaches middle age, both their physical and intellectual capacities are at their peak, allowing them to fully realize their potential; new things have reached perfection and are widely recognized by society. However, extreme prosperity inevitably leads to decline, whether in people or matters, as reaching the pinnacle also sows the seeds of downfall.

Diwang (帝旺) signifies prosperity and strength, as well as nobility and auspiciousness. It represents doing things smoothly and successfully, bringing benefits such as wealth, offspring, and other joyful events. It is likened to the maturity of body and mind in one's prime, akin to the peak of imperial power, having reached the summit, yet implying the risk of decline. Some predictive texts describe Diwang as embodying meanings like glory, development, self-satisfaction, spirit, excitement, vigor, strength, grandeur, proficiency, power, brilliance, flourishing, advancement, authority, extremity, climax, and apex.

Generally speaking, a Bazi (八字) chart with Diwang is the most prosperous among the twelve branches. For Yang (阳) day masters, Diwang is essentially Yang Ren (阳刃), with a tendency towards decline after reaching extreme prosperity, feeling strong yet powerless. Such charts exhibit a strong sense of self-esteem, reflecting the principle of things reversing when they reach an extreme. Typically, men with this fate have weak ties with their parents but get along well with their in-laws; women tend to dominate their husbands, making harmony difficult.