辛亥 Day Pillar (Xin Hai): Na Yin and elements
What the Day Pillar shows
The 辛亥 (Xin Hai) Day Pillar pairs the Yin Metal Heavenly Stem with the Pig Earthly Branch. In a full chart this is the pillar readers use to locate the Day Master — the reference point from which other stems and branches are compared.
The Na Yin image
In the Na Yin tradition, the 辛亥 pair carries the image "Metal of Hairpins and Jewelry" (钗钏金, Chai Chuan Jin). Na Yin is a poetic layer that assigns a combined image to each consecutive pair of pillars. It is a traditional vocabulary for noticing quality and texture, not a prediction.
How the stem and branch interact
The stem is Yin Metal (Metal) and the branch is associated with Water; in this pairing, the branch element feeds the stem element. Traditional readers describe this configuration as relatively supported.
A careful reading boundary
A Day Pillar is a calculated position inside a Four Pillars chart, not a verdict about a person. Read it with the Month Pillar, the visible elements, and the certainty of the birth record.