Qimen is the disguised version of the Eight Trigrams, which are the eight gates of life, death, rest, surprise, injury, Dumen, Jingmen, and the open gate. Among them, only the gate of life and the door of opening are auspicious gates, and the other six gates are all unlucky gates.
In the heavenly stems, Yi, Bing, and Ding are the three wonders, and Wu, Ji, Geng, Xin, Ren, and Gui are the six rituals. Among them, A is the most noble one that does not appear, but is hidden in the six rituals, so it is called Dunjia. First of all, we need to calculate the direction of A. There is no fixed number of whether to approach or avoid it depending on the situation.
Qi Men is an offensive technique, and Dun Jia is a defensive technique, so Qi Men Dun Jia is actually an offensive and defensive technique, used for fighting.
The Bagua compass is often used to calculate Feng Shui. There are five elements in the formation of heaven and earth: people, things, places, things, and time. Therefore, the simplest compass has three layers, based on the three talents, and the upper layer is like the sky. Nine stars, the middle level is like people to open the eight doors, and the lower level is like earth to divide the eight trigrams to guard the four directions.
With the two solstice of winter and summer, two escapes of yin and yang are established, one is smooth and the other is reverse, and a thousand and eighty rounds are calculated by laying out three oddities and six rituals
Arrange the layout: Years, seasons, hours, eight generals, nine stars (Tianpeng, Tianrui, Tianchong, Tianfu, Tianqin, Tianxin, Tianzhu, Tianren, Tianying) and nine gods will lay out appropriate fortunes on the nine palaces of Luoshu. Combine them to determine the direction of bad luck.
It is said that the Yellow Emperor obtained the Houfeng Formation and defeated Chi You, thus creating China. The human king Fuxi subdued the dragon and horse that were causing trouble in the Yellow River. The dragon and horse presented a jade version of the river map, which is the Bagua "Book of Changes". A giant turtle carried "Luo Shu" into the city. King Wen Jichang obtained "Luo Shu" and understood the "Book of Changes" and wrote "Book of Changes". Jiang Ziya divides each solar term into three rounds and seventy-two rounds for the three people of heaven, earth and people. Zhang Liang of the Western Han Dynasty simplified it into nine bureaus of Yang Dun, nine bureaus of Yin Dun, and eighteen bureaus.