A set phrase referring collectively to people from all walks of life or all various trades and occupations.

The core concepts of ancient Chinese cosmology and philosophy, combining the dual forces of [[阴阳|陰陽|yin1 yang2]] with the five elementary forces or phases of [[五行|五行|wu3 xing2]] (wood, fire, earth, metal, and water). This school of thought influenced all aspects of Chinese culture, including statecraft, medicine, and divination.