Lianhua Qingfei Capsules, clearing the plague and detoxifying the toxin, promoting the lung and draining heat. It is used for the treatment of influenza with heat and toxin attacking the lung. The symptoms include: fever or high fever, chills, muscle aches, stuffy nose and runny nose, cough, headache, dry throat, sore throat, red tongue, yellow or yellowish coating, etc. Whether it is influenza or SARS, the initial onset of the disease is not removed from the symptoms, but the internal heat is already burning, so it is obvious that it is a syndromic disease of Wei Qi. This formula is derived from Yin Qiao San and Ma Heng Shi Gan Tang, with Lian Qiao, Peppermint and Ephedra, which are used for evacuating the exterior surface of the Wei Qi, together with Guan Zong and Pan Lan Gen to help Yin Hua. In this way, while dispersing the external evil, the use of heat-clearing and detoxifying products, directly clearing the heat and toxicity of the qi division, can receive the same treatment of the body and qi, the function of both the surface and the interior. In the formula, Ephedra and Rhubarb are used together, which also contains the profound meaning of “preventing the wind and Tong Sheng from relieving both the exterior and interior of the body”. 2. First evidence of the use of drugs, cut off the disease Influenza has a rapid onset, the characteristics of rapid transmission. The treatment cannot follow the rule of “after Wei, then Qi, after Ying, then Blood”, as Wu Youke said: “the method of several days, one day to lead, because its poison is very, the transmission is also fast, the medicine must be tight”. Therefore, Chinese medicine treatment should be used first to cut off the disease. In the early stage of the disease, Lianhua Qingpu is applied to expel lung heat in Ma Heng Shi Gan Tang, together with Da Huang, which can drain the lung and expel blood stasis from the internal organs. Thus reversing the disease mechanism, interrupting the disease potential and cutting off the transmission to the Ying-Blood. Prevent pneumonia, myocarditis and other diseases from occurring after a cold. 3. Overall regulation, multi-target treatment Although Lianhua Qingpu is based on “clearing the plague and detoxifying the lung heat” as the main method of treatment, it is appropriately combined with drugs that invigorate blood circulation and eliminate blood stasis, ventilate heat from the internal organs, aroma and avoid obscenity, especially with Rhodiola Rosea that benefits Qi and nourishes Yin to regulate immunity and support the righteousness and dispel evil, which can mobilize the body’s ability to resist and recover, and prevent the disadvantages of rhubarb attack. Modern pharmacological research proves that Rhodiola rosea can improve the body’s tolerance to oxygen, and has the effect of both Shengyi drink and the combination of Danshen and Chuanxiong. It has a significant improvement effect on pulmonary edema. The pharmacological study of Rhodiola rosea shows that it has both broad-spectrum antiviral effects and antibacterial, antipyretic and anti-inflammatory, cough and phlegm, and regulates immune function, thus blocking the vicious cycle of multiple pathological links, showing the overall therapeutic advantages of the drug with multiple targets and links. Preventing diseases before they occur and preventing changes in existing diseases.