At the beginning, people carved the names of gods on mahogany and put them at the door, thinking that this could exorcise ghosts and evil spirits. Later, it gradually developed into Spring Festival couplets and became a custom to increase the festive atmosphere during the Spring Festival. Spring Festival couplets, also known as "couplets" and "door couplets", are neat and concise, and are generally popular greetings for people to express their good wishes for the new year.