There is no such thing as a preferred proprietary Chinese medicine for yin-yang deficiency. Yin and yang deficiency is commonly found in kidney yin and yang deficiency, and the treatment can be selected from medicines such as tortoise and deer erxian cream or tortoise and deer erxian oral liquid, and dihuang drink. According to Chinese medicine, there is a close relationship between yin and yang. When either side of yin and yang is weakened to a certain extent, yin damage will occur and yang damage will occur and yin damage will occur, and yin and yang deficiencies will eventually develop. Gui Lu Er Xian Cream or Gui Lu Er Xian Oral Liquid is derived from the Chinese herbal formula Gui Lu Er Xian Gum, which consists of Deer Antler Gum, Lycium barbarum, Gui Jia Gum, and Ginseng. It has the effects of warming the kidney and benefiting the essence, tonifying qi and blood, and is used as a main treatment for kidney deficiency after prolonged illness, lumbar and knee soreness, and deficiency of essence and blood. Dihuang Drink is composed of cooked and dried Dihuang, Ba Ji Tian, Cornu Cervi Pantotrichum, Poria Pak Fu Ling, Maimendong, etc. It has the effects of nourishing kidney yin, tonifying kidney yang, opening up the orifices and resolving phlegm. It is often used in the treatment of yin and yang deficiency that occurs in the course of chronic diseases such as post-stroke syndrome. Avoid eating spicy food while taking the above medicine. Caution should be exercised for those with weak spleen and stomach. They should not be taken at the same time with cold and flu medicines. Tonic herbs should be taken before meals or at the same time with food. Any need to be gradual process, do not pursue the speed and abuse of drugs. Do not take the medicine without authorization. If the symptoms do not improve within two weeks of taking the medicine, or if there is any discomfort during the period of taking the medicine, the patient should go to the hospital immediately.