What have you learned from observing the sky, feng shui, strange doors or stars?

The study of astronomical phenomena covers many disciplines, such as geomantic omen, strange door, star watching, external application and so on. The two commonly used ones are Feng Shui and Qimen. Geomantic omen is an ancient culture in China, involving orientation metaphysics, Thai hexagrams, Yin and Yang, Yin and Yang contract, array method and five elements. Qimen is a theory that combines the mathematics of gossip with the theory of yin and yang of the five elements. Its knowledge mainly focuses on the spirit number of gossip. According to the relationship between Jiugong Bagua and Taiji diagram, the number phases with specific significance are calculated.