Shen's Water Bureau, Haimao's Unfinished Wood Bureau, New Self-Defense Fire Bureau and Ugly Alloy Bureau.
"Kao Yuan" said: "Three in one, life, prosperity and tomb are combined." If water is in Shen, flourishing in Zi and grave in Chen, Shen, Zi and Chen form a water bureau. The rest and so on.
Its earliest three-in-one record is found in the book Huainanzi, which says: "Wood is born in the sea, stronger than wool, and dies before, and all three are wood." Gold, wood, water and fire are listed in the book, but soil is not mentioned. Nowadays, some Yin and Yang families in the five elements are born in fire, and longevity begins in Yin. The so-called "propane is born in yin." Some soil is sent to water, and its life is founded in Shenwei. Even more ancient is to send Shen to see for himself.