Stage 1 · Term 2 of 34
Pillar 柱
Zhù
One of the four columns of a BaZi chart (year, month, day, hour). Each pillar pairs one Heavenly Stem on top with one Earthly Branch below. The four pillars together are the chart's complete raw data.
In the classics
《渊海子平》 sets out the four-pillar frame (年月日时) and the palace meanings the tradition still uses: the year as ancestors and origins, the month as parents and career seat, the day as self and spouse, the hour as later life and descendants.
In a chart
A pillar is read twice: as raw material (its stem and branch, their elements) and as a palace (the life domain it governs). The same character means differently in different seats — pressure in the month pillar touches career; the identical character in the hour pillar touches later life. Palace reading is one of the oldest layers of the system and the reason position always matters.
Worked example
In the chart above, 丙子 is the month pillar: 丙 fire sits on top (the stem), 子 water below (the branch). As a palace, that pillar also describes the parental home and the career environment.
Where beginners misread it
Reading pillars as four separate mini-charts. The four are one system — branches combine and clash across pillars, and no pillar's meaning survives isolation from the other three.
Spotting a palace is Stage-1 work; weighing what a loaded palace means for a real chart is what a teacher trains you to do — that layer lives at Yixin Academy.
learnwithyixin.com/courses →What does Pillar mean in BaZi?
One of the four columns of a BaZi chart (year, month, day, hour). Each pillar pairs one Heavenly Stem on top with one Earthly Branch below. The four pillars together are the chart's complete raw data.