In ancient calligraphy, because each Chinese character consists of one or more strokes, various stroke methods are used to represent different glyphs. In China's ancient calligraphy works, some Chinese characters with complicated glyphs, such as "dragon", "rain" and "flying", can all be represented by "Shu" strokes. In addition, calligraphers also use the symbol "Yi" to express the structure of some Chinese characters, such as "Shang", "Xia", "Left" and "Right".
In computer terminology, "Yi" usually means "or". For example, in programming, we use the logical operator "Yi" to realize or operation, that is, when one of the two Boolean values is true, the whole expression is also true. In addition, in computer programming language, we can also use "three" to represent bitwise OR operation, or bitwise operation, etc. It can be seen that "Shu", as an uncommon word, has different applications in different fields. It not only has the beauty of calligraphy, but also has important computer functions.