It is the dried above-ground part of Artemisia annua or Artemisia capillaris of the family of Asteraceae, and the residual roots and impurities need to be removed when it is used in concoctions, and the roots have no special medicinal value. It is the dried above-ground part of Artemisia annua or Artemisia capillaris of Asteraceae family. It is bitter and pungent in taste, slightly cold in nature, with the effect of clearing dampness and heat, relieving bile and jaundice, and can be used in the treatment of jaundice with scanty urination, dampness-warmth (caused by dampness-heat sensation and warmth), summer-dampness (that is, caused by the sensation of summer and dampness), and itching of wet sores, and other diseases. Yin Chen can be decocted soup for internal use, can also be appropriate amount of decoction soup fumigation for external use, but the accumulation of blood yellow and blood deficiency yellow people should be used with caution, the specific use should also be carried out under the guidance of a physician, do not blindly use their own Chinese herbs, if you are not feeling well, should also be timely and actively seek medical treatment.