Refers to Chinese characters with the same meaning in ancient and modern times but different characters. There are two types of ancient and modern Chinese characters: Class A is synonymous, that is, ancient Chinese characters have exactly the same meaning as modern Chinese characters, such as Yi/Kuai, Yi/Fa, Yi/Ye, Yi/Yin,? /Jing, etc. Class B is unequal in meaning, that is, the meaning of ancient Chinese characters is not exactly the same as that of modern Chinese characters, such as mo/dusk, respect/welcome, comparison/avoidance, etc.
Variant characters are a group of words with the same pronunciation and meaning but different glyphs. Because Chinese characters are composed of signifiers, annotations and symbols, the angle of choosing signifiers varies from person to person, and annotations are different from the letters in Pinyin, so there are many phenomena in the history of Chinese characters. Such as tears-tears, tears-tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears, tears.