They called that kind of thing Mengjie sponge, the raw material is human protein.
Electromagnetic waves are energy, and ghosts are also a type of energy.
Using this kind of thing and spraying it on the places where ghosts haunt and on one's own eyes, it works like a filter, so that the existence of this energy can be seen, and images of different wavelengths can be seen, that is, ghosts.
And if the Mengjie sponge absorbs enough energy, it can achieve the effect of anti-gravity, which means that people can stand on the ceiling.
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