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TL;DR: Chen mountain belongs to the Earth element, is part of the Zhen trigram (East-Southeast), and symbolizes beginning, power, and stability. In feng shui, the Chen direction is generally favorable for people with Earth or Metal elements, bringing luck in career and wealth if used appropriately.
Where is the Chen Mountain on the compass, and why is its position derived rather than memorised?
The Chen Mountain sits at roughly 112.5° to 127.5° on the compass ring, that is, at the leading edge of the Southeast sector. This position does not need to be memorised, because it can be derived from two fixed rules of the 24 Mountain system.
First, the 360° circle is divided evenly among 24 mountains, so each mountain is exactly 15°. Second, the mountain at the centre of each of the eight directions carries that direction's name. The Southeast direction has its centre at 135°, and its central mountain is Xun. So Xun occupies 127.5° to 142.5°. Counting back one mountain toward the North, we get the Chen Mountain at 112.5° to 127.5°. Counting back one more mountain gives Yi, at 97.5° to 112.5°.
Among the 24 mountains, Chen is the 9th when counting clockwise from Zi at true North. The count runs: Zi (1), Gui (2), Chou (3), Gen (4), Yin (5), Jia (6), Mao (7), Yi (8), Chen (9). This number 9 is simply the result of counting, not an attribute of the mountain.
The 24 mountains are made up of 12 earthly branches, 8 heavenly stems, and the 4 trigrams Qian, Kun, Gen and Xun. There are only 8 heavenly stems because Wu and Ji both belong to Earth, corresponding to the central palace, and the central palace has no position on the compass ring. The four principal trigrams Kan, Li, Zhen and Dui have no mountain bearing their name, because those four positions are already occupied by the four branches Zi, Wu, Mao and You. That is why Chen, an earthly branch, sits in the Southeast sector rather than a mountain named after a trigram.
Which palace does the Chen Mountain belong to in the Later Heaven bagua, and which three mountains share that palace?
The Chen Mountain belongs to the Xun palace in the Later Heaven bagua. The three mountains sharing the Xun palace are Chen, Xun and Si, in order from North to South on the compass ring.
It is important to distinguish palace from direction clearly, because this is where many articles confuse readers. The Southeast is one of the eight directions, each 45° wide. The Xun palace in the Later Heaven bagua also corresponds to the Southeast, but a palace is a category of the bagua system, used to assign trigrams, assign the five elements, and assign house groups. The two concepts share a location but are not identical in role.
The three mountains in the Xun palace are not of the same kind. Chen is an earthly branch, Xun is a trigram, Si is an earthly branch. This difference in kind is precisely the basis for classifying the Three Yuan dragons in the next section. The central mountain of the Xun palace, that is the Xun mountain, is the mountain bearing the name of the Southeast direction itself.
What is the five-element nature of the Chen Mountain, and why are there two answers that do not contradict each other?
Considering the five elements of the earthly branch that gives the mountain its name, Chen belongs to Earth. Considering the five elements of the palace containing it on the Later Heaven compass, Chen lies in the Xun palace, and the Xun palace belongs to Wood. These two statements do not contradict each other because they speak about two different things: one speaks about the nature of the earthly branch Chen, the other speaks about the five elements of the palace in which that mountain resides.
This is where very many articles go wrong. When someone writes "the Chen Mountain belongs to the Earth element" in one paragraph and a few lines later writes "the Chen Mountain belongs to a Wood-element palace" without stating the frame of reference, the reader will think the author is contradicting himself. In fact there is no contradiction, only two systems being used side by side without being named.
The table below separates each frame of reference clearly for the Chen Mountain:
| Frame of reference | Result for the Chen Mountain | Note |
|---|---|---|
| Five elements of the earthly branch | Earth | The nature of the character Chen itself |
| Later Heaven bagua palace | Xun | The only palace containing this mountain |
| Five elements of the Xun palace | Wood | An attribute of the palace, not of the mountain |
| Direction among the eight | Southeast | The 45° direction containing the mountain |
| Three Yuan dragons | Earth Yuan dragon | Determined by position within the palace |
| Eight Houses (Bát Trạch) | East Four Houses | Because the Xun palace belongs to the East Four Houses |
| Degree range | 112.5° to 127.5° | Each mountain is exactly 15° |
| Opposite mountain through the centre | Xu | Northwest, Qian palace |
The fact that Chen is Earth while the Xun palace is Wood leads many practitioners to habitually interpret it through the Wood-overcoming-Earth relation. That reading only has meaning within the framework of a specific system, and it must be stated clearly what is being compared with what. Otherwise it turns into an idle remark.
What is the Three Yuan dragon of the Chen Mountain, and what does that mean when choosing a mountain-direction?
The Chen Mountain belongs to the Earth Yuan dragon. Among the three mountains of the Xun palace, Chen is the Earth Yuan dragon, Xun is the Heaven Yuan dragon, and Si is the Human Yuan dragon.
The Three Yuan dragons divide the 24 mountains into three groups by the position of the mountain within its palace, not by the mountain's five elements. The Heaven Yuan dragon group consists of the mountains at the centre of each palace, that is the four trigrams Qian, Kun, Gen and Xun together with the four branches Zi, Wu, Mao and You. The Earth Yuan dragon group consists of the mountains in the first half of each palace clockwise. The Human Yuan dragon group consists of the mountains in the latter half of each palace.
The three mountains within a palace cannot substitute for one another because each mountain has a different dragon, and the dragon is one of the criteria for deciding whether a mountain-direction can be used in a given period. If a house is shifted from the Chen mountain to the Xun mountain, even by only a few degrees, the dragon has changed from Earth to Heaven, and the interpretation result under the Three Yuan system can be reversed. This is why precise measurement is not a mere formality.
Where does Bát Trạch place the Chen Mountain, and what are the limits of that placement?
Bát Trạch places the Chen Mountain in the East Four Houses, because this mountain lies in the Xun palace, and the Xun palace belongs to the East Four Houses group. The East Four Houses group consists of the four palaces Kan, Zhen, Xun and Li; the West Four Houses group consists of the four palaces Qian, Kun, Gen and Dui.
The limits of this placement should be stated clearly. Bát Trạch is a system used to match the householder's life trigram with the house direction, and it works at the level of the eight directions, not at the level of the 24 mountains. When we say "the Chen Mountain belongs to the East Four Houses", we are in fact saying "the palace containing the Chen Mountain belongs to the East Four Houses". The Chen Mountain itself has no separate place in Bát Trạch beyond lying within the Xun palace.
For this reason, Bát Trạch does not distinguish Chen from Xun or Si. All three mountains in the Xun palace are treated the same way by Bát Trạch. To distinguish those three mountains, one must move to another system, such as the Three Yuan dragons or Xuan Kong flying stars. Mixing Bát Trạch with the Three Yuan dragons without naming the system produces conclusions that cannot be verified.
How does Xuan Kong flying stars use the Chen Mountain, and where do the schools still disagree?
Xuan Kong flying stars uses the Chen Mountain as one of the 24 sitting-facing directions for building a flying star chart. Sitting Chen facing Xu, or sitting Xu facing Chen, are two house orientations with their own star charts for each period. The mountain star and facing star are placed according to the period and the sitting-facing direction, then interpreted through the combination of stars in each palace.
Here there is a point on which the branches of Xuan Kong have not agreed: how to assign yin and yang to each mountain. Different branches may assign yin and yang to a mountain by different criteria, and this affects whether the flying stars run forward or backward. This is a real disagreement, not something invented to make the article more dramatic.
It should be noted that this disagreement lies at the step of operating the star chart, not at the division of the 24 mountains. No feng shui school uses a different 24-mountain division for the Chen Mountain. Its palace is still Xun in the Later Heaven bagua, and its degree range is still 112.5° to 127.5°. The disagreement appears only in the subsequent steps of deduction.
How does measurement error affect identifying the Chen Mountain?
The Chen Mountain is only 15° wide, so a slight deviation crosses into another mountain. The two boundary degrees at either end are 112.5° and 127.5°. The adjacent mountain to the North is Yi, in the Zhen palace, roughly 97.5° to 112.5°. The adjacent mountain to the South is Xun, in the Xun palace, roughly 127.5° to 142.5°.
If the reading comes out at 112° instead of 113°, we have fallen into the Yi mountain, that is, from the Xun palace into the Zhen palace, and from the Earth Yuan dragon into the Heaven Yuan dragon. This is not a small error in interpretation, but a change of the entire system. This is why practitioners usually measure several times at several positions, especially at the centre of the house and in front of the main door, then take the stable value.
The influence of large metal objects, electrical wiring and electronic devices in the house should also be noted, because they can deflect the compass needle. The zones close to the two ends of a mountain are often called boundary zones, where the qi is mixed and interpretation is less clear.
Which parts of this article are cultural knowledge rather than prediction?
This entire article belongs to cultural knowledge. That the Chen Mountain lies at 112.5° to 127.5°, belongs to the Xun palace, belongs to the Earth Yuan dragon, and belongs to the East Four Houses, are facts of a frame of reference with a fixed structure. Whether they are right or wrong is internal to that system; it is not a question of right or wrong about any particular person's fate.
Statements such as "a house sitting Chen facing Xu brings wealth and fortune" or "a person of the Wood element should avoid the Chen Mountain" are predictive statements, and this article does not offer them. Feng shui is a cultural tradition with a history, a system of symbols and many branches, but it is not a verified predictive tool. Read an article about the 24 mountains to understand the system, not to believe that some particular number of degrees decides your fate.
Overview article on the topic: What is feng shui? Foundational principles and how to apply it
Quick reference table: the Chen Mountain
| Aspect | Content |
|---|---|
| Order among the 24 mountains | 9 |
| Type | Earthly Branch |
| Degree range on the compass | 112.5° to 127.5° |
| Direction among the eight | Southeast |
| Later Heaven bagua palace | Xun |
| Five elements of the earthly branch Chen | Earth |
| Five elements of the Xun palace | Wood |
| Three Yuan dragons | Earth Yuan dragon |
| Bát Trạch | East Four Houses, because the Xun palace belongs to the East Four Houses |
| Three mountains sharing the Xun palace | Chen (Earth), Xun (Heaven), Si (Human) |
| Central mountain of the Southeast direction | Xun |
| Adjacent mountain to the North | Yi, Zhen palace |
| Adjacent mountain to the South | Xun, Xun palace |
| Opposite mountain through the compass centre | Xu, Northwest, Qian palace |
The figures in the table match the results of the lookup tools on Nhật Nguyệt.
