Traditional Chinese medicine sachet originated from "dressing change therapy" of traditional Chinese medicine. There was a folk saying that "wearing a vanilla bag is not afraid of five bugs". Wearing sachets is a folk custom, but it is also a way to prevent plague. Sachet is usually used with aromatic Chinese herbal medicines, such as Atractylodes lancea, Kaempferia Kaempferia, Angelica dahurica, Acorus gramineus, Ligusticum Chuanxiong, Cyperus rotundus and Magnoliae Flos, which contain strong volatile substances.