What Is Thượng Sơn Hạ Thủy in Huyền Không Phi Tinh? Why It Is Considered an Inauspicious Configuration and How Classical Texts Discuss Remedies

What is thượng sơn hạ thủy?

Thượng sơn hạ thủy is a configuration in Huyền Không phi tinh (the flying star school of feng shui) in which the prosperous star of the mountain star flies to the facing palace, while the prosperous star of the facing star flies back to the sitting palace. In other words, the two stars that should stand in positions favorable to the landform swap places with each other: the mountain star, which properly belongs to the high place, instead sits in the facing direction, and the facing star, which properly belongs to the low place, instead sits in the sitting direction. This configuration is described as the prosperous star of the facing flying to the sitting mountain, while the prosperous star of the mountain flies to the front facing; if the landform does not match appropriately, the usual meaning is depletion, loss of both wealth and people.

This configuration is the reverse side of "prosperous mountain, prosperous facing." If prosperous mountain and prosperous facing is the ideal, then thượng sơn hạ thủy is the paradoxical condition, in which the prosperous qi of the period does not gather in the right place.

Why is it called "mountain goes up, water goes up the mountain"?

In Huyền Không, the mountain star represents the qi of mountains, tied to people and to stability. The facing star represents the qi of water, tied to wealth and to the flow outside. When the prosperous mountain star instead sits in the facing direction, where there should properly be a low, open place with water, it is considered the mountain pushed down into the water. Conversely, when the prosperous facing star sits in the sitting direction, where there should properly be high backing, it is considered water pushed up onto the mountain.

Some texts use the image of the mountain god having to go down into the water while the water god has to go up the mountain to describe this inversion. That phrasing is metaphorical, helping the reader picture why the configuration is seen as unfavorable, rather than describing a physical mechanism.

Why is thượng sơn hạ thủy considered an inauspicious configuration?

Thượng sơn hạ thủy is considered inauspicious because it places the two most important currents of qi in a house in the wrong positions. The prosperous mountain star should properly sit in the sitting direction to guard the people, yet it flies over to the facing direction, so the people lose their backing. The prosperous facing star should properly sit in the facing direction to receive wealth qi, yet it flies back to the sitting direction, so wealth loses its place of gathering. Trạch vận tân án describes the consequence as decline in both people and wealth.

According to Trạch vận tân án, a house whose star chart is thượng sơn hạ thủy, with high, full ground behind and low, open ground or water in front, is indeed committing the fault, and if the outer landform is also bad, disaster comes quickly. Conversely, if in front, where the prosperous star of the mountain star sits, there is a mountain or tall buildings, and behind, where the prosperous star of the facing star sits, there is water or open space, then by the principle in the texts that the mountain star should obtain mountain and the facing star should obtain water, that house does not commit the fault in the narrow sense.

How do the star chart and the landform depend on each other?

In Trạch vận tân án, the star chart does not stand alone: the text requires the facing star to obtain water and the mountain star to obtain mountain. That means that with the same inauspicious star chart, the outer terrain can make the configuration heavier or lighter; conversely, a fine star chart still fails if the terrain contradicts it: the book writes that a đáo sơn đáo hướng house whose front is blocked by a high mountain, with no water in sight, is still ruined.

For this reason, thượng sơn hạ thủy on the star chart must be read together with the landform; it is not in itself a fixed verdict.

Why can the landform reverse the configuration?

According to the principles of Trạch vận tân án, a house with a thượng sơn hạ thủy star chart but with a high mountain in front and a large body of water behind has the prosperous star of the mountain star meeting a mountain and the prosperous star of the facing star meeting water, so it does not commit the fault in the sense of the text. Here the landform has swapped roles: the place that should be the facing has a mountain, and the place that should be the sitting has water, creating a situation opposite to the star chart yet one that balances the configuration.

A specific star chart example: period 8, Cấn mountain, Khôn facing

To picture this more clearly, take the example of period 8 with a Cấn mountain, Khôn facing house. In period 8, star 8 is the star of the current period, that is, the prosperous star. When the star chart is set up for Cấn mountain, Khôn facing, star 8 of the mountain star flies to the Khôn palace in the facing direction, while star 8 of the facing star flies back to the Cấn palace in the sitting direction.

Checked against the principle: the prosperous mountain star, which should properly sit in the sitting position, instead sits in the facing, and the prosperous facing star, which should properly sit in the facing, instead sits in the sitting. This is exactly the thượng sơn hạ thủy situation. If the house has a mound or tall buildings behind (Cấn) and low, open ground or water in front (Khôn), the common layout of backing behind and openness in front, then star 8 of the facing star meets mountain while star 8 of the mountain star meets water, which is exactly what Trạch vận tân án calls thướng sơn hạ thủy.

Conversely, if there is a mountain or tall buildings in front and water or open space behind, then by the principle that the mountain star should obtain mountain and the facing star should obtain water, both stars 8 meet what they need. The book does not promise that such a layout will prosper: discussing a house sitting Canh facing Giáp in period 7, which commits phản ngâm, phục ngâm and thướng sơn hạ thủy together, it only writes that when the outer landform obtains proper mountains and water the harm can be lessened, yet disaster still cannot be avoided. This example shows that with the same star chart, the interpretation depends greatly on the actual landform.

When a house has a combined facing (kiêm hướng), meaning its sitting and facing deviate from the center of one mountain toward the neighboring mountain, the upright chart is no longer enough for a conclusion. Trạch vận tân án writes that a deviation of four to six degrees must be calculated with thế quái (substitute stars). In its section on thướng sơn hạ thủy, the book lists twelve cases in period 7, namely the six mountains Giáp, Canh, Tỵ, Hợi, Càn and Tốn deviating to the mountain on the left or on the right, and holds that all twelve commit this fault.

How do the classical texts discuss remedies through landform?

Trạch vận tân án has no separate section teaching how to remedy thượng sơn hạ thủy; what the book discusses lies in three places. The part on thế quái (substitute stars) writes that thế quái is mostly used when the upright facing cannot be timely, as with thướng sơn hạ thủy, so that the prosperous star reaches a direction with fine mountains and water or fits the thành môn. The case of the Hứa family house in Fujian, sitting Canh facing Giáp, which commits the fault of the mountain star going down into water and the water star going up the mountain, records the advice to leave the house for a few months and then return in order to change the house chart, and to move the path to the Giáp palace. The case of the Trung Ấn Thiên Trúc monastery in Hangzhou, sitting Mão facing Dậu and built in period 4, records the advice to change the facing, and then the move to a new site to set a different facing.

The Thanh Nang tự has the line: "sơn thượng long thần bất hạ thủy, thủy lý long thần bất thượng sơn." It means the dragon spirit on the mountain does not go down into the water, and the dragon spirit in the water does not go up the mountain. Trạch vận tân án cites this line at the head of its section on thướng sơn hạ thủy, treats it as the rule of lý khí in Huyền Không, and explains that mountain governs people while water governs wealth.

Which landform suits a thượng sơn hạ thủy star chart?

From the principle that the mountain star should obtain mountain and the facing star should obtain water, followers of Huyền Không phi tinh infer that a thượng sơn hạ thủy star chart suits a landform opposite to the usual one: a mountain or tall buildings on the facing side, water or open space on the sitting side. Nhập môn loan đầu records the same idea in its part on the flying star school: a direction holding a growing or prosperous star of the mountain chart should have a mountain, and a direction holding a growing or prosperous star of the facing chart should meet water. That is a condition about the existing landform. In the passages that discuss this configuration, Trạch vận tân án does not teach building mounds or digging ponds as a cure, and the book only says that a good outer landform lessens the harm without removing it.

Related configurations and where the schools disagree

Thượng sơn hạ thủy is usually placed alongside other configurations such as đáo sơn đáo hướng, song tinh hội hướng and song tinh hội tọa. One way of discussing them distinguishes them clearly:

The point where usage diverges most is the definition itself. Trạch vận tân án defines the fault by the actual landform: a direction holding a growing or prosperous star of the mountain chart that has no mountain but has water is hạ thủy; a direction holding a growing or prosperous star of the facing chart that has no water but has a mountain is thướng sơn. The common usage, which is also that of the table at the end of this article, looks only at where the two prosperous stars fall on the star chart.

Trạch vận tân án also writes that phản ngâm and phục ngâm are no less harmful than thượng sơn hạ thủy, but if the three numbers of the three charts are skillfully combined, misfortune can be turned into fortune. From this one can see that the decisive factor lies in how the star chart interacts with the landform, not merely in the appearance of the stars themselves.

What are the practical applications and limits of thượng sơn hạ thủy?

In practice, judging thượng sơn hạ thủy requires the practitioner to know the period qi clearly, set up the star chart correctly, and only then compare it with the landform. Feng shui is not a static discipline but one that moves with time, so the same house can bring different results across different periods. For this reason, one should not mechanically apply a single thượng sơn hạ thủy configuration to conclude fortune or misfortune in every case.

One important note is that this is a feng shui concept, not a basis for construction engineering. The conclusions about draining wealth, harming people or illness in the classical texts carry a warning character within the feng shui framework, and do not replace surveys of structure, foundation, drainage or building safety. Readers should treat this as a cultural and historical perspective on feng shui, not as a handbook for deciding on construction.

Which sitting and facing directions fall into thượng sơn hạ thủy?

Periods 2, 3, 4, 6, 7 and 8 each have six sitting and facing directions that are thượng sơn hạ thủy; periods 1 and 9 have none. Period 5 is not put into the table because Ngũ Hoàng sits in the central palace and corresponds to no trigram among the 24 mountains, and the texts handle this period differently. The table is calculated according to the method of setting stars in Huyền Không phi tinh of the Thẩm school, and covers only upright facing (hạ quái).