Saju
Saju, also known as Gaju or Four Pillars of Destiny, is a traditional East Asian form of divination originating in China. It is based on the belief that a person's destiny is determined by the precise time of their birth. This time is represented by four pairs of characters, known as the Four Pillars. Each pillar represents a year, month, day, and hour, and each pair consists of a Heavenly Stem and an Earthly Branch.
These Heavenly Stems and Earthly Branches are associated with specific elements (wood, fire, earth, metal, water)
The practice is deeply rooted in Taoist philosophy and cosmology, particularly the concepts of Yin and Yang