What does this mean?

The meaning of the Central Plains is to erect the flag of "Zhong" to measure the wind direction, indicating the middle, extending to the meaning of inner, inner and middle, and extending to the meaning of semi-middle, moderate, suitable and harmonious.

"Zhong" is a cognitive word or reference word in six books. In Oracle Bone Inscriptions, the word "zhong" belongs to pictograph, which is the pictograph of a flag. Like an erect flag, the upper and lower flags flutter to the left, and the square mouth stands in the middle, indicating the middle. This glyph was originally a symbol of a clan. Jin Wenqi _ to the right. Xiao Zhuan saves the flag. Lishu is the same as Xiao Zhuan, regular script strokes and Chinese characters. Oracle Bone Inscriptions's common phrase "Stand in the middle, the wind is dead" means to erect the flag in the middle to measure the wind direction. From the center, inner, intermediary, media and other meanings; It is also extended to the meaning of suitability, conformity and achievement of goals.