The Four Cardinals (四正) is a principle in Bazi. The branches Mao (卯), Wu (午), You (酉), and Zi (子) represent the peak of each season, hence they are termed the Four Cardinals. These four Earthly Branches also represent the Peach Blossom (桃花星), symbolizing beauty, attraction, and romantic opportunities. This principle is essential in Bazi for understanding the energetic peaks within the seasonal cycle and their influence on personality and life events.