What is the most important link of "Six Rites" in ancient China wedding ceremony?

Six rites, the wedding ceremony of Han nationality. It refers to six kinds of etiquette from marriage negotiation to marriage completion, namely, accepting gifts, asking names, accepting gifts, inviting guests and welcoming them face to face. The most important thing is to greet each other.

Nacai means that the man's family asked the matchmaker to propose marriage to the woman's family, and the woman's family promised to propose marriage, and the man's family prepared six gifts. Asking the name means that the man's family asks the matchmaker to ask the woman's name and date of birth. Naji, that is, after the man retrieved the woman's name and eight characters, he performed divination in the ancestral hall. Zheng Na, also known as Nabi, means that the man's family gives it to the woman's family as a dowry. On the date of invitation, the man chooses the wedding date and prepares gifts to inform the woman's family for approval. Kissing is when the groom goes to the woman's house to get married. With the progress of society, these six rites have been replaced by new marriage customs.