The use of Yuan Zhi is mainly based on decoction of soup for internal use. If children need to use Yuan Zhi, it is recommended to use it under the supervision of parents. Yuanzhi is the dried root of the plant Yuanzhi or ovate-leafed Yuanzhi of the family Yuanzhiidae. It is bitter, pungent and warm in nature, and belongs to the heart, kidney and lung meridians. It has the efficacy of tranquilizing the mind and promoting wisdom, transporting the heart and kidneys (the fire of the heart descends and the water of the kidneys ascends, which is in mutual control), expelling phlegm and subduing swellings. Clinically, Yuan Zhi can be used in the treatment of insomnia and dreaminess, forgetfulness and palpitations, trance, cough and phlegm, sores, swelling and poison, breast swelling and pain caused by the lack of communication between the heart and the kidneys (heart fire, kidney yin deficiency, and the dysfunction of the physiological functions of the heart and the kidneys). It should be avoided if there is fire in the heart and kidneys, or if there is deficiency of yin and hyperactivity of yang. For children who need to use Yuan Zhi, it is recommended to go to a regular hospital for treatment under the guidance of a professional physician.