In thousands of years of social and interpersonal communication, the Chinese people have formed a series of "rules" for "visiting relatives". Although there are no clear requirements, they contain very rich content and important forms, which have been handed down for thousands of years. The communication between friends without kinship seems very casual, but there are also some unwritten rules that need to be jointly followed. Whether relatives or friends, "reciprocity" is indispensable in communication, and there are many things that need to be paid attention to. With the changes in China's social and human relations, the form of "visiting relatives and friends" is also different from before, but the warm communication habits between people have basically kept.