The medicinal properties of white peony are slightly cold, mainly to nourish the blood and regulate menstruation, astringent Yin and stop sweating, as well as softening the liver and relieving pain, calming the liver Yang. The medicinal properties of red peony is also cold, but the effect is to clear heat and cool the blood, dispel blood stasis and relieve pain, which is the relative difference between the two drugs. They also have something in common, they are both dried roots of the buttercup plant Paeonia lactiflora, obtained through concoction of the herb. Red peony mainly goes to the liver meridian, while white peony can also go to the spleen meridian. However, both of these medicines should not be used casually, and must be applied under the guidance of an herbalist who identifies the evidence and the disease, and then combined with the doctor’s prescription.