I had a dream about ghosts, and the ghosts said to me, do you believe in ghosts in this world? I said believe, the ghost said why, I said you are not a ghost?
The so-called foreign ghost is what people often call a kid. There are two kinds of ghosts in legend. One is that after death, the soul has obsession and stays on earth without going to the underworld, which is called a ghost; One is that female creatures get old and produce wisdom, which is called ghosts. But what I said above is just a legend, which cannot be verified. At least I haven't seen it.
As for whether there are foreign ghosts, I think there are, but ghosts are not easy to form. The appearance of ghosts must have two necessary conditions. First, the spirit before death, or brain waves, is very powerful and will not dissipate immediately after death; Second, the external environment is conducive to the survival of brain waves. After most people die, the soul will disappear immediately and will not form a ghost. Only when there is extreme fear or other strong obsession before death, the soul experiences out of body and happens coincidentally, will there be ghosts. Ghosts produced by this situation have only a little memory when they die, and have no memory of what happened before. In fact, this kind of opportunity is rare, and even if there is, the ghost will slowly dissipate over time. There may be a certain probability that ghosts can survive for a long time and produce wisdom, but this probability is one in ten billion.
At the same time, I want to say that there are really ghosts in this world, so don't be afraid. As the old saying goes, people are afraid of ghosts for three points and ghosts are afraid of people for seven points. People are worse than ghosts, and they can be destroyed with one blow.