I thought it was related to the laws prohibiting promotion of cults and superstitions, if it's ghosts or reanimated skeletons, they classify it as promotion of superstitious belief in the supernatural.
Sounds like the "official government" reasoning for the ban, but there is indeed a cultural aversion to the depiction of human skeletons in Chinese culture, I've run up against it before at work when I was working for a company that dabbled in selling recorded entertainment through retail outlets.
They've got such cute little skeletons though, they need to show them off more often. /s
Eye sockets velly sranted!
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