1. Variant characters are a group of words with the same pronunciation and meaning, but different glyphs. Also known as "Youti" or "Youti", it is called "Chongwen" in Shuo Wen Jie Zi, which refers to Chinese characters with the same sound and meaning but different writing methods.
2. Because Chinese characters are composed of signifiers, notes and symbols, the angle of choosing signifiers varies from person to person, and the notes are different from the letters in Pinyin, so the phenomenon of multiple forms of one word can be found everywhere in the history of Chinese characters. It should be noted that variant characters are not the same as traditional characters.