Since ancient times, the "red crown" on the head of the red-crowned crane has often been considered to be a highly toxic substance, called "crane red" or "erysipelas". Once in the mouth, it will cause death and is hopeless. It is said that when the emperor executed his ministers, he put "erysipelas" in the wine he was given. Ministers also put "Crane Crown Red" in the court beads so that they could commit suicide in times of emergency. In martial arts novels, martial arts people often use this highly poisonous substance to demonstrate their superb poisoning skills.
——As for this crane-top blue...
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