What Is Sea Metal (Hai Zhong Jin)?
In a Nutshell
The NaYin of the Jia Zi and Yi Chou stem-branches: gold sunken in the sea — a treasure with a name but no visible form.
Quick facts
| Item | Detail |
|---|---|
| Stem-branches | Jia Zi, Yi Chou |
| NaYin element | Metal |
| Signature image | Treasure hoarded in the Dragon Palace, a pearl cradled by the sea-dragon |
What is Sea Metal?
Sea Metal is one of the thirty NaYin (Melodic Elements) groups of the sexagenary cycle, covering the two stem-branches Jia Zi and Yi Chou. The sixty stem-branches are taken two at a time, in order, forming thirty groups; each group has its own NaYin name, and as a rule the name's final word is the group's NaYin element. The Jia Zi–Yi Chou group is called "Sea Metal."
A NaYin's element often differs from the elements of its own stem and branch: Jia is a Wood stem and Zi a Water branch, yet the NaYin is Metal — so counting the Five Elements by stem-branch and by NaYin gives different answers, and the two must not be mixed.
On the name's imagery, the *San Ming Tong Hui*'s chapter on NaYin images explains it as "a treasure hoarded in the Dragon Palace, a pearl cradled by the sea-dragon": gold sunken in the sea, like treasure hidden in the Dragon King's palace or a pearl held by a river-dragon — it has a name, but its shape is unseen. The text adds that "to appear, it still borrows from the empty rush; to become a vessel, it borrows nothing of fire's strength" — this kind of metal-qi lies deeply hidden, not yet revealed or forged with outside help. The same chapter cautions that these images are "borrowed meaning for analogy — do not cling to them literally."
How to look it up: match the stem-branch of your Year Pillar or Day Pillar against the NaYin chart. For example, 1984 was a Jia Zi year and 1985 an Yi Chou year, so anyone born in those years carries Sea Metal as their Year Pillar NaYin; a Jia Zi or Yi Chou Day Pillar works the same way. MoZhu's built-in NaYin lookup tool lists the NaYin of all Four Pillars automatically from a birth time.
In usage, early methods gave the Year Pillar NaYin great weight; since the Song dynasty, the Zi Ping school centers on the Day Master, and NaYin mostly serves as auxiliary reference. This page introduces the name's meaning, the lookup method, and the classical account — and draws no inferences from NaYin. It helps to treat NaYin as the traditional culture's set of alternate names for the stem-branches.
Classical sources
"Sea Metal: a treasure hoarded in the Dragon Palace, a pearl cradled by the sea-dragon; to appear it still borrows from the empty rush, to become a vessel it borrows nothing of fire's strength…"
(Rendered from the classical Chinese original.)
Source: *San Ming Tong Hui* (Comprehensive Treatise on the Three Destinies), *Lun Na Yin Qu Xiang* (On the Images Adopted by NaYin)
Plain-language reading: Sea Metal is like treasure hidden in the Dragon Palace, a pearl cradled by the sea-dragon: to come into view it still needs outside help, and becoming a finished vessel does not rely on fire. It describes metal-qi deeply hidden — named, but formless.
*For entertainment purposes only.*