Period Ling Shen and Zheng Shen
With knowledge of the current Earth Period we are currently in, based on the Earth Period Time System, we will be able to ascertain the birth, flourish, decline, and death (生旺衰死) of the Yin and Yang forms of the physical landforms on Earth. This is determined using both Luo Shu and the Early Heaven Eight Trigrams, to locate the Ling Shen (零神) and Zheng Shen (正神) directions. Ling Shen directions are the directions where the Yang forms, such as water mouth, flourish and are auspicious whereas the Zheng Shen directions are directions where the Yin forms, such as mountains, flourish and are auspicious.
For this determination, the current Period number is placed in the Central Palace of the Luo Shu Nine Palaces and the rest of the Luo Shu numbers are placed either in ascending or descending sequence based on Yin number descending sequence, Yang number ascending sequence principle, and following the Luo Shu placement pattern. The Period Ling Shen is where the Luo Shu number 5 falls in and the Period Zheng Shen is the direct opposite of where Luo Shu number 5 falls in.
Currently, we are in Earth Period 9. Hence, to locate the Ling Shen and Zheng Shen for Earth Period 9, the Luo Shu number 9 is first placed in the Central Palace of the Luo Shu Nine Palaces. As Luo Shu number 9 is a Yang number, the rest of the numbers are placed in an ascending sequence following the Luo Shu placement pattern. Hence, Luo Shu number 1 is placed at the corresponding Gen Trigram Palace, Luo Shu number 2 is placed at Kan Trigram Palace and so forth for the rest.
Luo Shu number 5, the Period Ling Shen, falls at Kun Trigram and the Period Zheng Shen falls at Qian Trigram, the opposite, of the Early Heaven Eight Trigrams. For the rest of the six Trigrams, three of them are considered to be Ling Shen as well and the other three are considered to be Zheng Shen as well, by way of the Correspondence and Distinct Aspect of the Eight Trigrams principle.
For Earth Period 9, the Period Ling Shen is at Kun Trigram. Kun Trigram is a Yin Trigram, along with Dui Trigram, Li Trigram and Xun Trigram. Hence, according to the principle, Dui Trigram, Li Trigram and Xun Trigram of the Early Heaven Eight Trigrams are also to be considered as Ling Shen.
Likewise, the Period Zheng Shen for Earth Period 9 is at Qian Trigram. Qian Trigram is a Yang Trigram, along with Gen Trigram, Kan Trigram and Zhen Trigram. Hence, according to the principle, Gen Trigram, Kan Trigram and Zhen Trigram of the Early Heaven Eight Trigrams are also to be considered as Zheng Shen.
Earth Period 9 Ling Shen Group (Shaded); Zheng Shen Group
Thus far, we have mention Ling Shen and Zheng Shen in terms of their Trigram Position, for example, Ling Shen being at Kun Trigram, Dui Trigram, Li Trigram, etc., of the Early Heaven Eight Trigrams. But if we are to know, in which of the eight directions are the Ling Shen or Zheng Shen, we are to note the corresponding Later Heaven Eight Trigrams.
Thus for Earth Period 9, the Later Heaven Eight Trigrams of Kan Trigram (North) direction, Zhen Trigram (East) direction, Xun Trigram (Southeast) and Kun Trigram (Southwest) are the Ling Shen directions. Similarly, the Zheng Shen directions for Earth Period 9 are Li Trigram (South) direction, Dui Trigram (West) direction, Gen Trigram (Northeast) direction and Qian Trigram (Northwest) direction.
Having determined the Ling Shen and Zheng Shen directions for the current Earth Period, we are now able to ascertain that for Earth Period 9, it is ideal and auspicious to have Yang forms – e.g. water mouth, door etc., – located at the North, East, Southeast and Southwest directions. Similarly, it is ideal and auspicious to have Yin forms – e.g. mountain, bed etc., – located at the South, West, Northeast and Northwest directions.