What is a ghost symbol?

Is one of the few three-character idioms, which is very special ~ ~ and its meaning is as follows.

Ghost charms are like spells drawn by ghosts, which can be smeared at will. Metaphor scrawled illegible handwriting. It is also a metaphor for being at sixes and sevens, and I don't know what to do. From Jin Yuanhao's On Thirty Poems: "There is a smooth road leading to eternal articles. Who is like Lu Yuchuan? True books don't enter the eyes of today, and children teach ghost paintings. "

Your ring should be some kind of totem or rune. Strictly speaking, it can't be called ghost symbol (because the derivative meaning of ghost symbol is derogatory).

Explanation 1:

"Ghost painting symbol" is also called "Ghost painting peach symbol". In ancient times, people used to write words similar to weeds on mahogany boards and then nail them on both sides of the gate to ward off evil spirits and ghosts. Because the handwriting was illegible, he later used "ghost painting peach symbols" to ridicule the scribbled people. It is also a metaphor for a mess. I don't know what I'm doing. From Jin Yuanhao's On Thirty Poems: "There is a smooth road leading to eternal articles. Who is like Lu Yuchuan? True books don't enter the eyes of today, and children teach ghost paintings. "

Explanation 2:

The meaning of "ghost painting symbol" may mean that ancient Taoist priests failed to catch ghosts, and it is also roughly interpreted as "nonsense", "deception" or "perfunctory" in modern spoken language.