Hai Ling Xiang Mu, a medicinal plant, is poisonous. It was first contained in the Chinese medical works "Suwen" and "Nanchen". It is reported that this thing is native to Xiniuhezhou (Buddhist place name), and every summer season, white milky liquid will ooze out of the fragrant wood. Local people dry the liquid in the sun and grind it into a white powder. This white powder burns with a crackling sound, like water dripping, and produces black gas. If people and animals sniff into the black gas, before their eyes will produce hallucinations, paralysis of the mind, mental hyperactivity, behavioral madness, its role is about similar to methamphetamine, ecstasy and other drugs, and exposure to a little longer than the exhaustion and vomiting of blood and death, is a kind of covert poison.