What are the fortune-telling witchcraft in China and China?

Is it true that those who are possessed by ghosts and gods calculate divination?

There are many kinds of possessed fortune tellers, some are attached to people, and some are attached to objects, such as tables, mirrors, pens and plates.

People who are attached to people usually refer to people who go out. They will have a magical power to know things that ordinary people can't, and some of them have even changed their voices. For example, pens attached to objects usually draw circles, and some even write. In the Qing, Song and Tang Dynasties, they could write anything, but everything was true and false. They have experienced it themselves and heard of what others have experienced, so I believe they exist. But not all the calculations are correct.