Answer: (1) spatial distance; The closer the distance is, the more frequent the contact between people will be, and the easier it will be to get familiar with each other, understand each other, trust each other and support each other when encountering problems. However, sometimes too close and too familiar with each other will lead to all kinds of frictions and contradictions.

(2) appearance and appearance; Especially in the early stage of communication, it will have an important impact.

(3) ability and personality; People's inner ability and personality will play a more decisive role in the subsequent communication.

(4) Similarity; Similarity between people, especially those with similar values and attitudes, is more likely to become friends.

(5) Complementarity. People who are in a complementary state such as personality and temper will also have interpersonal attraction.