Yu Ping Feng San is a proprietary Chinese medicine composed of three drugs, namely Atractylodes Macrocephala, Astragalus Membranaceus, and Fructus Fengshui, which has the effects of benefiting Qi, consolidating the surface, and stopping sweating. It can be used for those who have deficient superficial strength, spontaneous sweating and vicious wind, with a white face or a weak body prone to feeling wind evil. Long-term use of Yu Ping Feng San can treat adults and children who are weak and prone to colds. Taking Yu Ping Feng San can treat and prevent rhinitis, chronic rhinitis as well as allergic rhinitis, asthma and bronchitis, emphysema and many other diseases. Taking Yu Ping Feng San has anti-cancer and cancer prevention effects.