What is the meaning of "yellow book and green paper" in Taoist scriptures? If it is something like cinnabar, what does this yellow writing mean?

What is the meaning of "yellow book and green paper" in Taoist scriptures? If it is something like cinnabar, what does this yellow writing mean?

In Taoism, "Yellow Book" usually refers to a symbol. Zuo Fu is a special combination of characters and patterns, endowed with magical power through certain rituals and spells, which can be used to exorcise evil spirits, pray for blessings and seek wealth. Therefore, the "Yellow Book" in the Taoist scriptures generally refers to this kind of symbol.

As for what to write, generally speaking, symbols are made of specific materials, such as cinnabar, ink, brush and so on. Of course, the specific materials and writing methods will depend on different symbol types and usage occasions.