It depends on the word.
"Zi" is a standard first-class word (commonly used word) in modern Chinese. It is pronounced "Zi" in Mandarin, which was first seen in Jin Dynasty and belongs to pictophonetic characters in Liu Shu. The basic meaning of "character" is the symbol used to record language, such as words; Extension means different forms of characters and calligraphy schools, such as cursive characters; Calligraphy works, such as calligraphy and painting.