DE stands for Death and Emptiness. It is a point in which the law of 'FengShui' breaks down, just like theoretical physic's Black Holes. One reason is that it is a point in which the Qi is too pure too intense to be use by normal people. Unless you are abnormal meaning, being a saint, absolutely noble person or being a monk without descendants. Therefore, by definition it is very inauspicious to set the grave or abode on a DE line.
THE 24 MOUNTAIN DE 二十四山空亡
DE is qualified further to minor and major. At an entry level DE minor is the boundary between each of the 24 mountains. These are the boundary of confused Qi. Sitting such will not give an accurate reading of the LuoPan. Therefore, a house sitting DE minor fails to establish sitting and facing. Especially true for practitioners of Sheng's Flying Star method, where a mitigation method called replacement stars are employed.
Within the DE minor, the boundary between two different YinYang mountains are the worse of the lots. If the YinYang is the same, the effect is less severe. However, since the YingYang of the 24 mountains differed among schools, not everybody would agree on this matter.
DE major are all the 0, 90, 180 and 360 degree of the LuoPan directions. These are the direct Zi, Mao, Wu and Dui mountains. It marks the exact Cardinal and its Qi is said to be very pure and intense. Only temples and places of worship could use this direction.
THE SHENG SHI'S XUANKONG REPLACEMENT STAR 飞星派胎星
Establishing the accurate sitting and facing is the fundamental of Flying Star to know how the star would fly within the LoShu Grid. The YinYang of the mountains would dictate how the stars fly forward or reverse. In the event of a DE or 3 degree within the DE, a method called Replacement Star could be afforded.
Therefore, once the sitting is 3 degree close to the boundaries of the 24 mountains, a new flying star natal chart can be drawn by replacing the facing and sitting star with the replacement stars. Shen uses the Jiang DaHung 9 stars ring as the basis of the replacement stars. However, this is not a genuine replacement star method.
THE GOLDEN DIVISION DE 分金空亡
For the DaGua school, besides the boundaries separating the 24 mountains, there are also the 32 lines separating the HeTu Pairs of GuaYun. Due to overlapping, there are altogether 48 DE and these as far as XKDG is concerned are pathways to the Hell and the passageways for spirits. Very malignant for both tombs and houses. It becomes very real and likely for a building to sit DE.
For the 240, 120, 72, 60 dragons method, the boundaries between these dragons are DE minor. Only in 72 dragons one is able to find DE major that is 12 of them together with the 60 dragons made up the 72 dragons. To appreciate such delicate theories, one has to understand the following explanation by the late grandmaster Li DingXin...
TO BE CONTINUE...