2. Ou (Pinyin: U, U) is a first-class Chinese character (commonly used word) in the General Standard of Chinese. This word first appeared in the Warring States script, and the actual production time may be earlier. The word "ou" belongs to the pictophonetic characters in "Six Books" and comes from "owe" and "area". The original meaning of ou is vomiting and reading u, which was later expressed by "ou". In modern Chinese, "ou" is mainly used for transliteration, such as Europe and Ohm. , pronounced "u". Also used as surname and compound surname "Ouyang".