2. Etymological evolution: knowing is a pictophonetic character, and the regular script is neat. Knowing is from wood to water, and the seven tones are composed of "water", "cut" and "wood", which means a tree that can shed liquid after being cut, resulting in the meaning of lacquer tree, which is a popular way to write the word "lacquer". Expand the word "seven" to indicate capitalization.
3. Names, Chinese characters, people's surnames and first names. Name is a specific name symbol given to everyone by human beings to distinguish individuals, and it is a sign to distinguish individual differences between people through language and written information. Because of names, human beings can communicate normally and orderly, so everyone has a name of their own.