 Practicing bigu alone cannot eliminate the Three Corpses, but will weaken them to the point where they can be killed with alchemical drugs, particularly cinnabar (Schipper 1993:167) . Early Daoist texts and traditions portray the Three Corpses in both "zoomorphic and bureaucratic metaphors" (Campany 2005:43) . The (4th century CE) Ziyang zhenren neizhuan "Inner Biography of the True Person of Purple Yang" (tr.Maspero 1981:332) described them living in the Three Cinnabar Fields.
<coherence>  Practicing bigu alone cannot eliminate the Three Corpses, but will weaken them to the point where they can be killed with alchemical drugs, particularly cinnabar (Schipper 1993:167) . Early Daoist texts and traditions portray the Three Corpses in both "zoomorphic and bureaucratic metaphors" (Campany 2005:43) . The (4th century CE) Ziyang zhenren neizhuan "Inner Biography of the True Person of Purple Yang" (tr.Maspero 1981:332) described them living in the Three Cinnabar Fields.
 Practicing bigu alone cannot eliminate the Three Corpses, but will weaken them to the point where they can be killed with alchemical drugs, particularly cinnabar (Schipper 1993:167) . Early Daoist texts and traditions portray the Three Corpses in both "zoomorphic and bureaucratic metaphors" (Campany 2005:43) . The (4th century CE) Ziyang zhenren neizhuan "Inner Biography of the True Person of Purple Yang" Tr.. described them living in the Three Cinnabar Fields.