The bagua mirror (八卦镜 bāguà jìng) is the small octagonal mirror you see above doors across Singapore, Malaysia and older Chinese neighbourhoods everywhere. It is one of the most visible feng shui (风水 fēngshuǐ) objects, and one of the most misused. This page explains what it is, the kinds you will meet, where it is traditionally hung and where it is not, and the courtesy that comes with hanging one.
What a bagua mirror is
A bagua mirror is a small mirror set in an eight-sided frame, with the eight trigrams (八卦 bāguà) arranged around it. Each trigram is a stack of three solid or broken lines, and together the eight are among the oldest symbols in Chinese thought. If you want to know the trigrams themselves, their names and what each stands for, our guide to the eight trigrams of the bagua sets them out in full.
In tradition the mirror is a protective object. That word matters, and we use it carefully: the custom is protective in intent. Whether it does anything beyond marking that intent is not something we claim.
Early Heaven and Later Heaven
The eight trigrams can be arranged in two classic orders, and the difference is the first thing worth checking on any bagua mirror.
- Early Heaven (先天 xiāntiān). Protective bagua mirrors traditionally use this arrangement.
- Later Heaven (后天 hòutiān). This is the arrangement used for directions inside the house, the one practitioners lay over a floor plan.
In practice, then, the two arrangements do different jobs. The Later Heaven sequence is a working map for the home; the Early Heaven sequence is the one traditionally framed around a protective mirror. Checking which order a frame follows is a simple way to see how a mirror was made to be used.
The three kinds of bagua mirror
The mirror at the centre of the frame comes in three shapes, and tradition gives each its own role.
| Kind | Surface | Traditional role |
|---|---|---|
| Flat | Plain, level glass | Reflects |
| Concave | Curves inward | Said to absorb or draw in |
| Convex | Bulges outward | Said to deflect or disperse |
Note the wording: “said to”. These are the roles tradition assigns, and different teachers lean on different kinds. We describe them so you can recognise what you are looking at, not to recommend one.
Where a bagua mirror is traditionally hung
The traditional use is outside, never in. A bagua mirror is hung on the exterior, above the main door or above a window, facing out toward a sha (煞 shà) feature. Typical examples of such a feature are a sharp corner of a neighbouring building pointing at the home, or a road running straight at the door, known as 路冲 lù chōng.
Just as clear is where it does not go. Traditionally a bagua mirror is never hung inside the home facing people, and never pointed at a neighbour’s door. The logic of the custom is that the mirror faces a feature in the landscape, not a person or a family.
Ordinary mirrors are a different matter altogether. Wall and wardrobe mirrors in bedrooms and hallways have their own customs, which we cover in our guide to feng shui mirror placement. The classic mistake is to treat a bagua mirror as just another mirror and hang it in the living room. In tradition it belongs outside.
Start with the door, not the mirror
Before thinking about any object, look at the entrance itself. Is it clear, lit, uncluttered, easy to open fully? Much of what people hope a bagua mirror will fix is better addressed by the door and its approach, which our front door feng shui guide walks through. The same applies to other objects people place at the entrance, such as the pixiu: tradition first, practical sense always.
Neighbour etiquette and the management-rules check
In dense housing, a bagua mirror is not a private matter. In a corridor of facing units, a mirror that seems to point at the flat opposite can read as a slight, and neighbours notice. Tradition itself says it should never be aimed at another household’s door, so good manners and the custom point the same way.
There is also a practical check. If you live in a condo or an HDB block, look at your management’s rules on items outside the unit before hanging anything. Corridors, door frames and facades often have their own requirements, and it is far easier to ask first than to take something down later.
Put simply: the mirror carries a tradition and an intention. It does not decide how a household fares. The home’s layout, the timing of the year and the people living there do that.
If you would like your home and your own chart read together, with the real questions on the table rather than a list of objects, our readings are one hour, chart in front of us, and a written summary afterwards. No fear-selling, and nothing to acquire.