What does it mean to count nine palaces with three eyes on one board?

"One board, three eyes and nine palaces" is a commonly used Chinese character recognition method, which describes the structure and construction of Chinese characters. Among them, "one board" refers to the left and right sides of Chinese characters, which usually has a long line foundation; "Three eyes" refers to three points: up, down, left and right, and usually consists of three small points; "Counting the Nine Palaces" refers to the process of drawing Chinese characters in the grid of the Nine Palaces in order of specified strokes. This method can help people better understand and remember Chinese characters, so as to better grasp the structure, sound, shape and meaning of Chinese characters.