What happens if the ghost stays inside the victim and doesn't lead the way?

Good ... the "reincarnation" and "electromagnetic wave" you refer to are originally things of two worlds. The former is mostly based on myth, and the latter is based on "scientific explanation" with the popularization of "ghosts". There is no connection between the two. Everyone believes in something different. I believe in reincarnation.

Secondly, if we understand it as "reincarnation", there are only three possibilities: 1, this ghost is lost; 2. There are unfinished wishes to see; 3. Pure revenge.

Generally speaking, the first one is the weakest and most changeable. In the end, they often feed on the aura of plants, but the possibility of playing tricks or being sucked away by ghosts is not ruled out. If you are lucky, you should be able to cross over.

Second, according to people's usual understanding, they should all be very kind middle-aged and elderly people, not necessarily. However, most of these ghosts return after determining the road, and they can be found by themselves. But there are also a few who turn into ghosts or between heaven and earth because their wishes cannot be realized, which is harmless to people.

The last one is the most famous spectre. Because of the heavy resentment, the spirit is also very strong. Some divination games that attract evil spirits are mostly for evil spirits. Of course, some good ghosts with strong goodwill will generally be regarded as the key tracking objects, and finally they will be caught back, because if the resentment is too heavy, they will blind their minds like human beings, the timid will wander around the cemetery, suck Yin Qi, and the courageous will die or suck negative emotions.