Toast, also called "tying the knot", is one of the marriage customs of Han nationality in China, which originated in the Zhou Dynasty. Toast at the wedding: In order to show that the husband and wife love each other, at the wedding, the husband and wife hold a glass of wine and take a sip, indicating that the husband and wife are one. However, it is said that in some folk areas, there is a etiquette of drinking a glass of wine between men, which is similar to the meaning of becoming sworn brothers.