And in another instance of ZUN doing his homework and possibly wanting to reference something:
"According to the backstory of Night Warriors, Hsien-Ko was born around the 1730s with a twin named Mei-Ling. During this time, ghosts and spirits of the dead arose from their resting places and attacked a rural Chinese village. [snip]
This turned the twins into a jiāngshī (僵屍 "stiff corpse"), a type of Chinese zombie."
The origin in question is apparently the story for Hsien-Ko from Capcom's Darkstalkers.