Wuxing: the five phases

Meaning of Wuxing

Wuxing, 五行, names wood, fire, earth, metal and water as categories through which Chinese thinkers have described change and relationships. “Five phases” emphasises their activity and interaction. “Five agents” and “five elements” are also familiar translations. The categories can concern materials, seasonal processes or political order, so their meaning depends on the context.

An influential early statement appears in Hongfan, the “Great Plan” chapter of the Shangshu, or Book of Documents. It lists water, fire, wood, metal and earth, then characterises them through actions: water moistens and moves downward, fire flames upward, wood bends and straightens, metal can be reshaped, and earth supports sowing and harvesting. This description emphasises what each does.

The wider networks of correspondence developed over time from several early fivefold arrangements. Wuxing became influential in accounts of government, ritual, medicine and divination across different intellectual and religious traditions.

Generating and overcoming cycles

Two sequences explain how the phases act on one another. Xiangsheng (相生) is mutual generation or production. Xiangke (相克) is mutual overcoming or restraint. Each phase generates one phase and overcomes another.

Read the middle column around a circle: Wood → Fire → Earth → Metal → Water → Wood. The overcoming sequence is Wood → Earth → Water → Fire → Metal → Wood.

The phases also link different kinds of things. Wood connects east, spring and blue-green within one network. Fire connects south, summer and red. Such associations allowed seasonal change, ritual dress, directions and human conduct to be discussed in a shared vocabulary.

Earth has a special position in these correspondences. Spatially, it occupies the centre around which the four directions are arranged. Its seasonal placement is less uniform. A five-season arrangement places it between summer and autumn, but this does not establish a fifth calendar season with one universally fixed date range. The five-phase scheme and the calendar's division into four seasons serve different purposes.

Calendar correspondences

The ten heavenly stems connect to the five phases in pairs. This is the correspondence behind year names such as Wood Dragon and Fire Horse: the phase comes from the stem, while the animal comes from the earthly branch.

Jia-Chen is a Wood Dragon designation because Jia belongs to Wood and Chen to Dragon. The phase describes one component of the stem-and-branch name, rather than assigning every part of the date to Wood.

A calendar can also show a branch's phase or a pair's Nayin classification. These are separate mappings. Jia-Zi has a Wood stem, while its Nayin name is Metal in the sea. A display containing both “Wood” and “Metal” can therefore describe different features of the same pair.

A Bazi birth chart applies these classifications to four pillars: year, month, day and hour. Its phase labels need to be read with the pillar and component they describe.