During the Han and Wei-Jin South and North Dynasties, auspicious sign and disaster-abnormity was theorized and prevalent applied.

• 两汉魏晋南北朝时期是祥瑞灾异理论建构和普遍应用的阶段,祥瑞灾异对这一时期政治生活的各个方面产生了深刻影响。