Why did you wrap zongzi with wormwood leaves or reed leaves and lotus leaves later? There is such a record in the Elementary Book: During the Jianwu period of the Han Dynasty, Changsha people dreamed of a man who called himself Dr. San Lv (the official name of Qu Yuan) at night and said to him, "Everything you sacrificed was stolen by the dragon in the river. In the future, you can wrap it with wormwood leaves and tie it with colorful silk threads. Dragons are most afraid of these two things. " So people wrapped the millet in "wild leaves".