Gengtie is one of the folk marriage customs of Han nationality. In the old custom, when engaged, men and women exchange positions such as name, date of birth, place of origin and three generations of ancestors. It was named after the Geng era. Also called eight-character stickers.

The ancient wedding custom of Han nationality calls the red invitation card with the names, places of origin, birthdays and ancestors of men and women "Gengtie". Some are also called "Nian Geng Tie". Geng is the year of Geng. Men and women exchange positions to express their proposal or engagement.

Hu Pu 'an wrote in the fourth volume of Chinese Folk Customs, Marriage in Haining, Zhejiang Province: "Whether Geng Tie will be sent to the dry house by an iceman is decided in January, and it is not allowed to live in January. In mid-January, the doer must marry someone who invites Geng Tie or go to the temple to ask for a sign.

For example, Bu Zhiji and Yang Bingren reported to Zhai Kun and chose to wrap their mouths in red or return the iron. There are also people who do not seek divination, saying that they are born marriages. When GengTie delivered it, the dry household washed a basket with rice, a red chopstick, spread a red towel for the patio, and placed a table of incense. The iceman was about to put Geng Tie in the basket when he left. "