# The Zi 子 mountain

> A house facing 0° is in the Zi 子 mountain. Zi covers every bearing from 352.5° up to 7.5° (crossing due North, 0°), within the Kan 坎 trigram in the North, element Water. A house facing Zi sits Wu 午 (172.5° – 187.5°) — described as sitting Wu, facing Zi. To be sure, measure the facing as an exact degree.

## Facts about the Zi mountain

- Name: Tý · Zi · 子
- Degree range: 352.5° – 7.5°
- Center: 0°
- Trigram: Kan 坎 (337.5° – 22.5°)
- Lines (bottom to top): yin, yang, yin
- Direction: North
- Element of the mountain: Water
- Element of the trigram: Water
- Three Yuan dragon: Heaven Yuan dragon
- Opposite mountain (sitting): Wu 午 · 172.5° – 187.5°
- Neighbouring mountains: Ren 壬 · Gui 癸
- Birth-year mountain: Birth-year mountain of people born in a Zi (Rat) year, with years counted from the Start of Spring.

## When measuring and setting polarity

The closer a facing is to the 352.5° or 7.5° boundary, the more easily a measuring error pushes it into Ren 壬 or Gui 癸. When a reading falls within 1° of either boundary, measure again at several points before setting polarity.

Once polarity is set, every room, door or item lying within the 352.5° – 7.5° sector, seen from the center of the house, belongs to Zi.

The three mountains of Kan 坎: [Zi 子](https://myhomecheck.ai/learn/24-mountains/ty) · [Gui 癸](https://myhomecheck.ai/learn/24-mountains/quy) · [Ren 壬](https://myhomecheck.ai/learn/24-mountains/nham)

## Questions about Zi

### Is a house facing 0° a North-facing house?

Yes, but that is not precise enough. The North spans 45° (337.5° – 22.5°) and holds three mountains, Zi, Gui, Ren; a house facing 0° is in Zi. Naming the mountain tells apart houses only a few degrees from each other.

### What does a house facing Zi sit on?

It sits Wu 午, 172.5° – 187.5°. Sitting and facing are always exactly 180° apart.

### Whose birth-year mountain is Zi?

It belongs to people born in a Zi (Rat) year, counted from the Start of Spring rather than Lunar New Year. When the main door or an active, heavy item falls exactly in Zi, say precisely whose Zi birth-year mountain it touches.

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Original page: https://myhomecheck.ai/learn/24-mountains/ty  
Other languages: [Tiếng Việt](https://myhomecheck.ai/vi/tri-thuc/24-son/ty/index.md) · [中文](https://myhomecheck.ai/zh/learn/24-mountains/ty/index.md)  
Updated: 2026-10-21