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Yun (Vital Qi/Movement) refers to motion, specifically the continuous circulation and cyclical return. Within the process of ascending and descending, inside the Great Void (Tai Xu, cosmic space), the upper and lower mutually attract; this is the moment when Qi arrives and rotates. Since the beginning of creation when Heaven and Earth were opened, within the two Qi of ascending and descending, there exists a rotating and returning Qi, all of which inherit the attributes of the Five Elements (Wood, Fire, Earth, Metal, Water); therefore, it is called "Five Yun" (Five Movements). Specifically: Earth Yun corresponds to the Heavenly Stems Jia and Ji; Metal Yun corresponds to Yi and Geng; Wood Yun corresponds to Ding and Ren; Fire Yun corresponds to Wu and Gui; Water Yun corresponds to Bing and Xin. Within these ten Heavenly Stems, the Five Qi circulate continuously, collectively named "Yun Qi" (Movement and Qi). In the second Jiazi cycle, combined with the relationships of Si Tian (Heavenly Supervisor, governing the first half of the year's climate) and Zai Quan (Earthly Spring, governing the second half), it is thus called "Three Yuan" (Three Cycles). When the Three Yuan combine, movement begins; consequently, the Three Realms (San Cai: Heaven, Earth, Humanity), Four Seasons (Spring, Summer, Autumn, Winter), Six Qi (Wind, Cold, Heat, Dampness, Dryness, Fire), and the generation of all transformations are entirely determined by this. Therefore, sometimes following Heaven's decree without transformation occurs; sometimes suppressing Earth's transformation so that growth does not occur; sometimes being suppressed by Heaven so that Yun does not respond; sometimes being supported by Earth so that Qi is not dedicated; sometimes excess leads to self-restraint; sometimes deficiency leads to being punished by others; sometimes self-damage returns to the balanced position. Thus, Heaven's decree responds to transformation, Earth generates formation, the Four Seasons change correctly, and the withering and flourishing of all things are all determined by this. Therefore, auspicious omens and inauspicious signs can be seen in advance; peace and prosperity or disaster and chaos can also be predicted beforehand; crop failure or abundance is also determined by this; people's diseases and disasters can also be verified. Hence, the arrival has specific days, observation has specific times, viewing has specific methods, and one must also divine from directions. The method lies in examining the hours; it cannot be perceived casually. One must carefully examine the number of days, as there are inherent additions, subtractions, generations, and progressions. One must also maintain purity and fasting before observing, and must not show it to non-persons (those unqualified or impure). The method starts from the 1st day of the 1st month in the Jiazi year of the Linde era of the Great Tang (664 AD), on the day of Siyou New Moon (first day of the lunar month), Lou Star belonging to Metal Dog. First, calculate accumulated years, then subtract once seven, using this as the base. Then divide by nineteen, named Leap Number Times, multiply by twelve. After multiplication, add the Leap Number again, then add the current month's number of times, listing them separately below. Then remove half. Next, remove the Leap Number, and vacate the Five Numbers. Then advance the upper position by one place, and multiply by three. Next, derive the name number of the lower position, removing the influence of small months (30 days). Then add the Month Command, see how many days remain, divide by sixty. If not fully divisible, multiply by one hundred, then subtract eighty-seven. If still not fully divisible, add the Yun Number: for Excess, add the Completion Number; for Deficiency, add the Generation Number. See the result. If it is a Yang year encountering an even number, add one; if a Yin year encountering an odd number, subtract one. This number represents the count within the ke (quarter-hour) of that day.

Regarding the twenty-four methods of Excess Yun:
Various Yun arrivals have dates, and Qi arrival has moments. Therefore, Excess Yun arrives thirteen days early, Deficiency Yun arrives thirteen days late, Balanced Yun coincides with Si Tian, Heaven Punishment Yun is five days after Si Tian, and Earth Punishment Yun is six days after Si Tian. These numbers have their own moments and follow the divination laws.

1. Jia Zi Year: Jia is Earth Yun Excess. Zi is a Yang year. Add six to the ke number. Why? Zi belongs to Kan, its number is 1. Earth Yun has no completion number, so use the generation number 5. 1 plus 5 equals 6. Thus, add 6 ke to the moment. At the time of Yun transition, face Yin direction and observe. First, green Qi appears. After it disappears, yellow Qi flows horizontally from Jia to Zi, where it ends. The Qi color is deep and clear, with no intermediate colors between, indicating the prosperity of Upper Qi (Heavenly/Earth Qi).

2. Jia Wu Year: Jia is Earth Yun Excess. Wu is a Yang year. Add fourteen to the ke number. Why? Wu belongs to Li, its number is 9. Earth number is 5. 9 plus 5 equals 14. Thus, add 14 ke. At the time of Yun transition, face Yin direction and observe. First, green-yellow Qi appears. After it disappears, yellow Qi flows horizontally from Jia to Wu, where it ends. The Qi color is deep, movement is swift, arriving on time without other colors, which is auspicious, indicating the prosperity of Earth Qi.

3. Jia Xu Year: Jia is Earth Yun Excess. Xu is a Yang year. Add ten to the ke number. Why? Xu belongs to Earth, its number is 5. Earth Yun number is 5. Two fives make ten. Thus, add 10 ke. At the time of Yun transition, face Yin direction and observe. First, green Qi appears. After it disappears, yellow Qi flows horizontally from Jia to Xu, where it ends. Movement is swift, color is deep, arriving on time is auspicious; otherwise, it is inauspicious.

4. Jia Chen Year: Jia is Earth Yun Excess. Chen is a Yang year. Add ten to the ke number. Why? Chen belongs to Earth, its number is 5. Yun is Earth, its number is 5. Two fives make ten. Thus, add 10 ke. At the time of Yun transition, face Yin direction and observe. First, green Qi appears. After it disappears, yellow Qi flows horizontally from Jia to Chen, where it ends. Qi color is deep, movement is swift, arriving on time without moving to other positions, all are auspicious.

5. Jia Shen Year: Jia is Earth Yun Excess. Shen is a Yang year. Add seven to the ke number. Why? Shen belongs to Kun, its number is 2. Earth Yun number is 5. 2 and 5 make 7. Thus, add 7 ke. At the time of Yun transition, face Yin direction and observe. First, green Qi appears. After it disappears, yellow Qi flows horizontally from Jia to Shen, where it ends. Color arrives on time without shifting, movement is swift, not going to other places, all are auspicious.

6. Jia Yin Year: Jia is Earth Yun Excess. Yin is a Yang year. Add thirteen to the ke number. Why? Yin belongs to Gen, its number is 8. Earth Yun number is 5. 8 and 5 make 13. Thus, add 13 ke. At the time of Yun transition, face Yin direction and observe. First, green Qi appears. After it disappears, yellow Qi emerges, not flowing horizontally but rushing up to heaven. Yin and Jia share the same image, so it does not flow horizontally, does not shift time, Qi lasts long without dissipating, auspicious.

7. Bing Zi Year: Bing is Water Yun Excess. Zi is a Yang year. Add seven to the ke number. Why? Zi belongs to Kan, its number is 1. Water Yun Excess takes the completion number 6. 1 and 6 make 7. Thus, add 7 ke. At the time of Yun transition, face Si direction and observe, because Bing resides in Si. First, red Qi appears. After it disappears, black Qi flows from Bing to Zi, where it ends. Qi color is deep, movement is swift, arriving on time without shifting position, auspicious.

8. Bing Wu Year: Bing is Water Yun Excess. Wu is a Yang year. Add fifteen to the ke number. Why? Wu belongs to Li, its number is 9. Water Yun Excess takes the completion number 6. 6 and 9 make 15. Thus, add 15 ke. At the time of Yun transition, face Si direction and observe. First, red Qi appears. After it disappears, black Qi flows from Si to Wu, all black. Color appears alone without shifting time, not violating other positions, auspicious.

9. Bing Xu Year: Bing is Water Yun Excess. Xu is a Yang year. Add eleven to the ke number. Why? Xu belongs to Earth, its number is 5. Water Excess takes the completion number 6. 5 and 6 make 11. Thus, add 11 ke. At the time of Yun transition, face Si direction and observe. First, red Qi appears. After it disappears, black Qi flows from Bing to Xu, where it ends. Qi color is deep, movement is swift, not violating other colors, thus auspicious.

10. Bing Chen Year: Bing is Water Yun Excess. Chen is a Yang year. Add eleven to the ke number. Why? Chen belongs to Earth, its number is 5. Water Yun Excess takes the completion number 6. 5 and 6 make 11. Thus, add 11 ke. At the time of Yun transition, face Si direction and observe. First, red Qi appears. After it disappears, black Qi flows from Bing to Chen, where it ends. Black Qi arrives according to time, not violating other positions, auspicious.

11. Bing Shen Year: Bing is Water Yun Excess. Shen is a Yang year. Add eight to the ke number. Why? Shen belongs to Kun, its number is 2. Water Yun Excess takes the completion number 6. 2 and 6 make 8. Thus, add 8 ke. At the time of Yun transition, face Si direction and observe. First, red Qi appears. After it disappears, black Qi flows from Bing to Shen, where it ends. Qi color is deep, movement is swift, arriving on time, not violating other positions, auspicious.

12. Bing Yin Year: Bing is Water Yun Excess. Yin is a Yang year. Add fourteen to the ke number. Why? Yin belongs to Gen, its number is 8. Water Yun Excess takes the completion number 6. 6 and 8 make 14. Thus, add 14 ke. At the time of Yun transition, face Si direction and observe. First, red Qi appears. After it disappears, black Qi flows from Bing to Yin, where it ends. Color is deep, movement is swift, arriving on time without losing position, thus auspicious.

13. Wu Zi Year: Wu is Fire Yun Excess. Zi is a Yang year. Add eight to the ke number. Why? Zi belongs to Kan, its number is 1. Fire Excess takes the completion number 7. 7 and 1 make 8. Thus, add 8 ke. At the time of Yun transition, face Si direction and observe, because both Bing and Wu reside in Si. First, yellow Qi appears. After it disappears, red Qi flows from Wu to Zi, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

14. Wu Wu Year: Wu is Fire Yun Excess. Wu is a Yang year. Add sixteen to the ke number. Why? Wu belongs to Li, its number is 9. Fire Yun Excess takes the completion number 7. 7 and 9 make 16. Thus, add 16 ke. At the time of Yun transition, face Si direction and observe. First, yellow Qi appears. After it disappears, red Qi flows from Wu to Wu, where it ends. Color is deep, movement is swift, returning to original position on time, auspicious.

15. Wu Shen Year: Wu is Fire Yun Excess. Shen is a Yang year. Add nine to the ke number. Why? Shen belongs to Kun, its number is 2. Fire Yun Excess takes the completion number 7. 2 and 7 make 9. Thus, add 9 ke. At the time of Yun transition, face Si direction and observe. First, yellow Qi appears. After it disappears, red Qi flows from Wu to Shen, where it ends. Qi color is deep, movement is swift, not shifting position, arriving on time, auspicious.

16. Wu Yin Year: Wu is Fire Yun Excess. Yin is a Yang year. Add fifteen to the ke number. Why? Yin belongs to Gen, its number is 8. Fire Yun Excess takes the completion number 7. 7 and 8 make 15. Thus, add 15 ke. At the time of Yun transition, face Si direction and observe. First, yellow Qi appears. After it disappears, red Qi flows from Wu to Yin, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

17. Geng Xu Year: Geng is Metal Yun Excess. Xu is a Yang year. Add fourteen to the ke number. Why? Xu belongs to Earth, its number is 5. Metal Yun Excess takes the completion number 9. 5 and 9 make 14. Thus, add 14 ke. At the time of Yun transition, face Shen direction and observe. Only white Qi appears, flowing from Geng to Xu, where it ends. No other colors, arriving on time without violating other positions, auspicious.

18. Geng Chen Year: Geng is Metal Yun Excess. Chen is a Yang year. Add fourteen to the ke number. Why? Chen belongs to Earth, its number is 5. Geng Metal Yun Excess takes the completion number 9. 5 and 9 make 14. Thus, add 14 ke. At the time of Yun transition, face Shen direction and observe. Only white Qi appears, flowing from Geng to Chen, where it ends. Color is deep, movement is swift, arriving on time without losing position, auspicious.

19. Ren Zi Year: Ren is Wood Yun Excess (Original Yun). Zi is a Yang year. Add nine to the ke number. Why? Zi belongs to Kan, its number is 1. Wood Yun Excess takes the completion number 8. 8 and 1 make 9. Thus, add 9 ke. At the time of Yun transition, face Hai direction and observe, because Ren Wood resides in Hai. First, black Qi appears, then green Qi flows from Hai to Zi, where it ends. Color is deep, movement is swift, not going to other positions, auspicious.

20. Ren Wu Year: Ren is Wood Yun Excess. Wu is a Yang year. Add seventeen to the ke number. Why? Wu belongs to Li, its number is 9. Wood Yun Excess takes the completion number 8. 8 and 9 make 17. Thus, add 17 ke. At the time of Yun transition, face Hai direction and observe. First, black Qi appears. After it disappears, green Qi flows from Ren to Wu, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

21. Ren Xu Year: Ren is Wood Yun Excess. Xu is a Yang year. Add thirteen to the ke number. Why? Xu belongs to Earth, its number is 5. Wood Excess number is 8. 8 and 5 make 13. Thus, add 13 ke. At the time of Yun transition, face Hai direction and observe. First, black Qi appears. After it disappears, green Qi flows from Ren to Xu, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

22. Ren Chen Year: Ren is Wood Yun Excess. Chen is a Yang year. Add thirteen to the ke number. Why? Chen belongs to Earth, its number is 5. Wood Yun Excess number is 8. 8 and 5 make 13. Thus, add 13 ke. At the time of Yun transition, face Hai direction and observe. First, black Qi appears. After it disappears, green Qi flows from Ren to Chen, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

23. Ren Shen Year: Ren is Wood Yun Excess. Shen is a Yang year. Add ten to the ke number. Why? Shen belongs to Kun, its number is 2. Wood Yun Excess takes the completion number 8. 2 and 8 make 10. Thus, add 10 ke. At the time of Yun transition, face Hai direction and observe. First, black Qi appears. After it disappears, green Qi flows from Ren to Shen, where it ends. Color is deep, movement is swift, arriving on time without shifting position, auspicious.

24. Ren Yin Year: Ren is Wood Yun Excess. Yin is a Yang year. Add sixteen to the ke number. Why? Yin belongs to Gen, its number is 8. Wood Yun Excess takes the completion number 8. 8 and 8 make 16. Thus, add 16 ke. At the time of Yun transition, face Hai direction and observe. First, black Qi appears. After it disappears, green Qi flows from Ren to Yin, where it ends. Color is deep, movement is swift, arriving on time without violating other positions, compliant.