In the spirit of I’m sorry I haven’t a clue…
Further to Speaking from the heart, where I noted the somewhat elaborate definition of the term dundian, here’s another fine definition—ironically, from the Chinese-Chinese dictionary of Li Manshan, no less, which we consulted when I mentioned the term lu, Daoist “registers” (lengthy hereditary titles bestowing the authority to conduct rituals), unfamiliar to him:
a superstitious thing that Daoists use to trick people
Hmm. Li Manshan shrugs, and we both giggle.