Yu Ping Feng Granules, derived from the traditional Chinese medicine formula Yu Ping Feng San, is a modern Chinese medicine preparation of Yu Ping Feng San, consisting of three Chinese herbs, namely, Fang Feng, Huang Qi and Fried Bai Zhu. It has the efficacy of benefiting Qi, consolidating the surface and stopping sweating. It is often used in clinical practice for the treatment of symptoms of superficial deficiency and spontaneous sweating, as well as for the prevention of people with deficient body qi, weak constitution and recurrent colds. It also has a certain therapeutic effect on allergic rhinitis, pediatric nephrotic syndrome, recurrent oral ulcers and other conditions. Modern research shows that: 1. Yu Ping Feng San has the function of biphasic regulation of immunity; 2. Yu Ping Feng San has the function of antiviral, and has a significant inhibitory effect on influenza and virus H3N2; 3. Yu Ping Feng San has a good improvement and therapeutic effect on allergic diseases.