The calligraphy of Mao and Egg are different. According to the query of relevant public information: egg (luan) is the birth word of Mao. The word "Mao" in oracle bone inscriptions comes from the worship of female genitalia. With the development of society, the transition from a matrilineal society to a patriarchal society, the worship of female genitalia gradually disappeared and was replaced by the worship of male genitalia. The character "egg" in bronze inscriptions and small seal script is both the birth character of "卯" and a pictographic character. After the change of officialdom, it was written in regular script as "EG".