Among the six kinds of ceremonies in ancient marriage, birds and geese were used in five kinds of ceremonies: accepting gifts, asking names, Naji, inviting guests and welcoming relatives. Why?

Ban Gu of the later Han Dynasty explained the use of wild goose as a gift in "The Legend of the White Tiger": "The ceremony says that a woman is promised to marry at the age of fifteen, receive a gift, ask her name, take her as a concubine, invite her, and greet her personally, based on wild geese. The requisition was announced, so there was no need for geese. Those who use geese should take them from north to south at any time, without losing the festival, when they don't take women; It is also a bird with the day, and the wife is also righteous; Take the flight into the line, stop the train, the wedding ceremony is clear, the young and the old are orderly, and they do not cross each other. You don't have to die for the gift basket, so you use geese. " The ancients used geese as a gift. It became a migratory bird in one shot. Every year, they go to the south at the autumn equinox and return to the north at the spring equinox. Sometimes, they never break their promises. It means that men and women keep their promises before marriage, and husband and wife remain faithful after marriage. Second, the goose is a bird that follows the sun, indicating that the woman is married and married; Third, take the geese in order, fly in a row and stop in a row. In the migration, the old and strong geese lead the way, and the young and weak geese follow closely, in an orderly way, which is a metaphor for the wedding ceremony. Young and old are orderly and do not cross each other. Because geese are birds, it is difficult to catch them. Later generations replaced geese with geese, which is called "wild geese".