Cliff cypress should be referred to the Korean cypress, the Korean cypress has the effect of cooling the blood to stop bleeding (make the blood cool and moist to prevent bleeding), clearing heat to stop dysentery, resolving phlegm to stop coughing, and is often used in the treatment of epistaxis, hemostasis and so on. Korean Cypress belongs to the cool blood and stop bleeding medicine, which is the branches and leaves of Korean Cypress, family Cypress. It is cold in nature, bitter and astringent in taste, and enters the large intestine and lung meridians. It has the efficacy of clearing away heat to stop dysentery, cooling blood to stop bleeding, resolving phlegm and relieving cough, etc. It is mainly used for treating blood spitting, blood in urine, blood in stools, epistaxis, chronic bronchitis and dysentery caused by blood-heat paranoia (the abnormal outward movement of the blood due to the evils of heat). Adverse effects of Chosun Ya Bai are not clear, because of its cold nature, the dosage should not be too large, cold spleen and stomach (spleen and stomach weakness and cold) and cold dysentery is prohibited, allergy and pregnant women are prohibited. If there is a need for medication, it is recommended that it be used under the guidance of a professional physician, not blindly self-medication.