It can be used for people with deficiency of the surface, spontaneous sweating, bad wind, white face, or people who are weak and easily catch cold. Yu Ping Feng granules are derived from Yu Ping Feng San, a very famous ancient formula in the Medical Recipe Collection, which is composed of three herbs, namely Huang Qi, Fang Feng and Bai Zhu, and is often used for people with respiratory diseases or Qi deficiency. In the formula, Huang Qi can tonify lung Qi and stop sweating, while Bai Zhu can strengthen the spleen and tonify Qi. The combination of Bai Zhu and Huang Qi can enhance the effect of tonifying Qi and stopping sweating, so for people with Qi deficiency, Bai Zhu and Huang Qi are a good combination to tonify Qi. Fangfeng can dispel wind evils at the surface and prevent the occurrence of colds, so this medicine can be used for people with a relatively weak constitution. If you want to prevent colds and strengthen your constitution, this preventive medicine can be applied as an option.