Everyone wants to make many friends and get sincere friendship. How do we do this? Psychologists advise us to observe the following four principles in interpersonal communication:

? (a) the principle of reciprocity: the basis of interpersonal relationships is mutual concern and support, and no one will accept others for no reason. Like is a prerequisite, and reciprocity is an important prerequisite. We like those who also like us, closeness and alienation, and likes and dislikes are mutual in interpersonal communication.

(2) Exchange principle: interpersonal communication is a process of social exchange. The basic principle of exchange is that individuals expect interpersonal communication to be valuable to themselves, and what they get in the process of communication is greater than what they lose, or at least what they get is less than what they lose. The development of interpersonal relationships depends on the choices made by both parties according to their own value judgments.

(3) Self-value protection principle: Self-value is an individual's understanding and evaluation of his own value. Self-value protection is a psychological tendency of self-support, and its purpose is to prevent self-value from being devalued and denied.

(4) Principle of equality: The social roles, status, influence and mastery of information of both sides are often unequal, which will affect the formation of substantive emotional relations between the two sides. However, if we treat others equally and make them feel safe, relaxed and dignified, then we can also establish good interpersonal relationships with those who are very different from our social status.