Period 9 (2024–2043): a Xuan Kong flying-star chart for your home

1. What the Period 9 calculator computes

In the Xuan Kong (玄空) school time is divided into 20-year periods. Period 9 runs from 2024 to 2043. The calculator builds a flying-star chart for your home: in each of nine sectors three numbers — the period star, the mountain star (山) and the water star (向). It needs two things: where the front faces (by compass, one of the 24 “mountains” of 15°) and the year the house was built or you moved in — the year sets the period of the chart.

2. Where the method comes from

The calculation and every explanation come from the Shen Shi Xuan Kong Xue (沈氏玄空學) of master Shen Zhureng, in the six-volume edition of 1933. Volume 5 describes the cycle of time: three eras of 60 years, each of three 20-year periods; the upper era is periods 1–3, the middle 4–6, the lower 7–9. Period 9 closes the lower era; after it the cycle starts again with period 1.

3. How the chart is built

The rule of volume 4: the period number is placed in the centre and flown through the sectors in forward order (centre → north-west → west → north-east → south → north → south-west → east → south-east). The number landing in the sitting sector (the back of the house) becomes the mountain star in the centre, the one in the facing sector the water star. Each flies on forward or backward, decided by the yin or yang of the mountain of the same order in that number’s trigram. Volume 4 lists, for each of the 24 mountains and each of the 9 periods, which stars come to the centre and how they fly. Our calculation matches the book in all 216 lines; in three lines the book contradicts itself (the flight direction does not agree with that line’s verdict), and there we follow the rule and the verdict.

4. How to use it

• Stand at the front door facing out and measure the direction with a compass — that is the facing. Pick the mountain whose sector the degree falls into.
• Enter the year the house was built or you moved in: from 2024 it is period 9, from 2004 to 2023 period 8.
• See where the stars 9 are: red in the mountain chart, blue in the water chart.

5. How to read the result

Volume 1: “what Xuan Kong most avoids is ‘going up the mountain and down into the water’, what it most desires is ‘reaching the mountain and reaching the facing’”. Going up the mountain (上山) means the ruling water star has landed at the sitting; going down into the water (下水) means the ruling mountain star has landed at the facing. The mountain star needs “solid ground and a high mountain” — support, a wall, something heavy; the water star needs “water and a low place” — a door, a passage, open space. So the sector with the ruling mountain star suits what is high and massive, and the sector with the ruling water star suits the entrance and open space.

A feature of period 9: in the ordinary construction none of the 24 houses has the best case (旺山旺向) — the editor of volume 1 notes this too. For 12 facings both ruling stars meet at the sitting, for the other 12 at the facing. The calculator shows which case your house has.

6. Stars of the year

Each year a year chart lies over the house chart. Of the year stars the book (volume 6) warns above all about star 5 when starting building or repairs; whether the others help or harm is decided by the house’s own stars. The year chart is computed by the annual flying stars calculator.

7. What the calculator does not do

It builds the chart the ordinary way (下卦). When the facing is close to the border between mountains, masters use “replacement stars” (替卦) — they are not in this calculator. Nor does it take into account the shape of the plot, the surroundings, water and roads around, which also matter in the book. The result is a traditional symbolic reading, not a prediction of events.

8. Frequently asked questions

Until what year does period 9 last?

From 2024 to 2043 inclusive; then period 1 begins.

Why does my house “go up the mountain” or “down into the water”?

In period 9 this is so for every house in the ordinary construction: both ruling stars meet either at the sitting or at the facing. What matters is what stands in those sectors: something high and solid at the mountain star, the entrance and open space at the water star.

My house was built in 2010. Which period is it?

Period 8 (2004–2023): the chart is built from the year of construction or moving in, and the calculator works it out itself.