The most common thing is that people dream about people they have experienced. Are symbols in dreams, representing the dreamer's emotions.
But remember, dreams are an extreme form of unintentional imagination, and the contents in dreams are often carried out by reorganization, exaggeration, substitution, replacement and concentration. After a series of creations, the characters in the dream may be people who have never seen in reality.
So sometimes in our dreams, there will be some strange people. When we wake up, we are still thinking: How can there be such strange people in our dreams? How can such a strange thing happen in the dream?