Gangdom is a superstition, let alone whether there are messengers.

Generally speaking, the view of the underworld and the dead is an ancient one in China. Influenced by feudal superstition and restricted by the cognitive level of scientific and technological development at that time, it is relatively narrow. For example, the underworld gives people the impression that it is gloomy, lacking in yang, and even dark and horrible, but it is not.

Generally speaking, we prefer to call it internal sense from the perspective of spiritual theory or modern science. Of course, you can also understand that different magnetic fields have different dimensions. There is no difference in essence. Nouns are artificially defined and easy to understand.