Qué describe el pasaje
Qing Geng resembles a magpie, with a blue-green body and white beak, eyes, and tail. Its cry is linked to its name. The entry attributes protection from epidemics to it but does not specify wearing, eating, or keeping the bird. A reading should not invent a procedure the passage omits.
Límites de la interpretación
Qing Geng and Fei form a revealing pair: one is associated with protection, the other with epidemic disaster. The contrast shows how an ancient narrative places health and danger among extraordinary creatures. It is cultural evidence, not evidence of medical effectiveness or disease causation.