It means the opportunity for old friends to meet again, the old friendship has a hint of resurrection, and the mood is soft and peaceful in the breath of missing each other. All the above statements are superstitious and have no credibility and scientific basis. Dreaming has no substantive meaning and function, as long as you relax and face life positively and optimistically.
Dreaming is a normal physiological phenomenon, which can be divided into fast wave sleep and slow wave sleep. Normal people dream every night, and most of them happen in deep sleep. Sometimes they can remember, sometimes they can't. This is restoring people's brain power, which plays a very important role in restoring people's memory and integrating knowledge.