BaZi, also known as the Four Pillars of Destiny, is a traditional Chinese system used for fortune-telling and understanding one's personality. It is based on the Chinese calendar and involves analyzing the year, month, day, and hour of a person's birth, represented by Heavenly Stems and Earthly Branches. This system is believed to reveal insights into an individual's character, relationships, and potential life path. Practitioners of BaZi use this information to provide guidance on personal development and decision-making, helping individuals align their actions with their inherent traits and the energies of the universe.