Left, horizontal, horizontal, vertical, left, and back.

Zhu, a first-level Chinese character, is pronounced as zhū or shú. It was first seen in oracle bone inscriptions. Its original meaning is tree trunk or red heart tree - a tree with a red heart.

That is what "Shuowen Jiezi" calls "red heart wood, a genus of pines and cypresses". By extension, it refers to bright red, and by extension it refers to cinnabar. It is used as a verb to refer to something dyed bright red, and by extension it refers to vermilion. Items etc.

Zhu refers to the word for things. In terms of glyphs, the character "Zhu" in oracle bone inscriptions (as shown in the picture) is the pictogram of a tree: the vertical one in the middle represents the trunk; the two branches extending upward represent the branches; the two branches extending downward represent the tree. root.

In the middle of the trunk, there is a short horizontal line, which represents the red heart of the tree. This cleverly expresses the original meaning of the word "Zhu": the name of a tree, namely "Red Heart Wood" - a tree with a red heart, belonging to the genus of pine and cypress.