Zhengchaihuyin Keli is a Class B Chinese proprietary medicine. The main ingredients are bupleurum, tangerine peel, windproof, licorice, red peony, ginger. Its main functions are disperse wind-cold, relieve fever and stop pain. It is used for the initial stage of exogenous wind-cold: fever and chills, no sweat, headache, nasal congestion, sneezing, phlegm, cough, and limb pain, as well as the onset of influenza and mild upper respiratory tract infections with the above symptoms.