What Is the Void (Gongmang)? Reading Empty Seats as Room to Be Filled

The Void (空亡, gongmang) is the term for the "empty seats" in a Saju chart. In classical Four Pillars practice, when you trace the sixty-Jiazi cycle from your Day Pillar (or Year Pillar), two Earthly Branches end up with no Heavenly Stem left to pair with — and those two branches are the Void. Read literally, the word means "emptiness (虛)," and old texts treated whatever sits in that spot as prone to spinning its wheels or bearing thin fruit. But Gwiraedang doesn't read the Void as a scary stamp of misfortune. We read it as a place where the energy simply runs differently because it's empty — after all, "empty" also means there's room left to be filled.

How is the Void determined?

The Void isn't something you pin on at will; it falls out automatically from the structure of the sixty-Jiazi cycle. There are ten Heavenly Stems and twelve Earthly Branches, so once you cycle the ten stems through one full round of pairings, two branches are always left without a partner. Those two leftover branches are the Void of that xun (旬 — a group of ten consecutive pillars within the sixty-Jiazi cycle). Gwiraedang works this out in code, deterministically, so the answer comes out the same for everyone, every time — where a generic chatbot might improvise, our engine derives the Void straight from the calendar's structure, with no guesswork and no drift.

The reference is your Day Pillar (or Year Pillar): Usually the Day Pillar — the stem-and-branch of your birth day — is the anchor. You start by finding the head of the xun it belongs to (the pillar that begins with Jia 甲).
The two branches left unpaired at the head of the xun: Counting out from the branch that sits with Jia (甲), the head of the xun, you reach the point where the stems run out and two branches remain. Those two are the Void.
A worked example (Ji-You Day Pillar): Take the Ji-You (己酉) Day Pillar as your anchor, and the Void comes out as the two branches Yin (寅) and Mao (卯). This is how each Day Pillar gets its own pair of empty seats.

Even for the same Void, which pillar it lands in — Year, Month, Day, or Hour — changes the area of life and the timing it touches, and this reads far more clearly alongside the coordinates of the palace positions (Gungwi). The Void is, at most, a supporting clue laid on top of the chart itself, so we never sum a person up on the Void alone.

Does having a Void always mean something bad?

No. Translating "empty" straight into "inauspicious" is far too narrow a reading. Empty also means there's room to be filled. An area touched by the Void can be seen as a place that grows more comfortable when you fill it with inner, spiritual value rather than gripping tightly at visible possessions or achievements.

Gwiraedang invites you to read the Void as a signal: "here, it's okay to loosen your grip a little." Like a bell that can only ring because it's hollow, emptiness becomes room for ease and reflection. So there's no need to brace yourself, assuming a Void means that part of your chart is a hollow lack. If you'd like to read its texture alongside other symbolic stars, you can go on to clues like the Peach Blossom, the Traveling Horse, and the Heavenly Nobleman in the symbolic stars guide.

FAQ

Which character is the Void determined from? Usually the Day Pillar — the stem-and-branch of your birth day — is the anchor. Within the xun your Day Pillar belongs to (a group of ten within the sixty-Jiazi cycle), you pair up all ten Heavenly Stems, and the two branches left over are your Void. Traditionally the Year Pillar is read alongside it too, but the core starting point is the Day Pillar. So to find your Void, the first step is simply to check which of the sixty Jiazi your own Day Pillar is.

Should a place with a Void just be left empty? Not so much left empty as read as a signal to shift your center of gravity a little in that area. It means this is a domain where you feel more at ease filling it with unseen values — learning, relationships, inner life — rather than clinging to visible possessions and achievements. Above all, please remember that Saju itself isn't a tool that tells you a fixed destiny; it's reference material for understanding your own temperament and tendencies. Any terms that trip you up you can look up in a Saju glossary.

The Void in Saju isn't a fortune that pronounces misfortune; it's a self-reflection reference that points out where it's okay to ease off.