Before a ceremony, notices are supposed to be posted in the streets and alleys, advising people of the time and reason for the ceremony and warning the particularly vulnerable--children, pregnant women and those in mourning--to be elsewhere so as to avoid the evil spirits.
出煞之前，照理得在各大小巷路貼出告示，除說明時間、事由，更要警告那些犯衝、帶孝者及孕婦、小孩迴避，以免為邪物所侵。