Umei can be used as a traditional Chinese medicine with certain efficacy and effects, but it is not possible to specify its efficacy and effects on the liver when consumed in water as a tea. The source of the drug is the dry nearly mature fruit of the Rosaceae plant plum, which is sour, astringent, flat, with astringent lung (astringent lung qi), astringent intestines, the production of fluids, roundworms, etc. It can be used for the treatment of lung deficiency and prolonged coughing, prolonged diarrhea and dysentery, deficiency heat and thirst, and roundworms vomiting and abdominal pain and other conditions. Its brewing water to drink tea for the improvement of the above symptoms have a certain effect, but the analysis of the composition is limited, can not replace the specialized medication, and its efficacy and effect on the liver and its brewing water does not have authoritative basis, should not be blindly long-term or a large number of brewing, in order to avoid adverse effects on the organism.