Harvey suggests  that Patterson had been reading about women pirates in one of two books or both published a short time earlier: I Sailed with Chinese Pirates by Aleko Lilius  and Vampires of the Chinese Coast by Bok  pseudonym for unknown.
Vampires of the China Coast.
Joseph Patterson , editor for the Chicago Tribune New York Daily News syndicate, hired Caniff to create the new strip, providing Caniff with the idea of setting the strip in the Orient.
It is also used to refer to any powerful but prickly woman, usually in a derogatory fashion.
Description: The stereotype has generated a large quantity of sociological literature. Vampires of the China Coast.