In addition, etiquette also has the functions of communication, coordination, maintenance and education. Etiquette plays a "bridge" role between people, which enables the feelings of both sides to communicate, makes the communication between people successful, and then enables people to develop various undertakings.
As a criterion for maintaining interpersonal relationships, etiquette is intended to regulate interpersonal relationships with "harmony". "Courtesy values harmony", and the function of courtesy is to regulate interpersonal relationships, but "harmony" should be based on courtesy, and only Hu can have harmony. If people can communicate and do things according to rules and regulations, people can achieve "harmony" without fighting, and people can do things smoothly, thus "extremes meet". Therefore, the more people who talk about etiquette in society, the more harmonious and stable society will be. In this sense, etiquette has played a role that laws and regulations cannot play.