In the practice of Bazi (八字), Luck Pillars (大运) refer to the major life periods or luck cycles that a person goes through during their lifetime. During each Luck period, a person’s life experiences, opportunities, and challenges are believed to be influenced by the predominant elements and energies associated with the Heavenly Stems and Earthly Branches of that period. These cycles play a crucial role in understanding the timing of significant events and the flow of fortune in a person’s life according to Chinese metaphysics.