For the first stage of cough in the late stage of external infection: yellowish nasal discharge, yellow sputum and red tongue, one can use: Fangfeng 6 g, Qianhu 6 g, Shuang Hua 6 g, Lianxiao 6 g, Dandelion 10 g, Zhe Bei Mu 6 g, Loquat Leaf 6 g and Almond 6 g. Meaning: Fangfeng and Qianhu dispel external evil; Shuang Hua, Lian Lian and Dandelion clear heat and detoxify toxins; Zhe Bei Mu, Loquat Leaf and Almond resolve phlegm and relieve cough. The second stage: cold symptoms disappear, clear nasal discharge, white phlegm and mild cough, using: Qian Hu 6 g, Thornbush 3 g, Radix Platycodon 6 g, Shuang Hua 6 g, Forsythia 6 g, Chen Pi 6 g, Aster 6 g, Zhan Dong Hua 6 g, Licorice 3 g. That is, Stopping Loudspeaker San with addition and reduction. Warming the lung and dispersing cold to resolve phlegm, Qian Hu, Thornbush and Radix Platycodon grandiflorus dispersing external evil, Shuang Hua and Forsythia clearing heat and detoxifying toxins, Aster and Radix et Rhizoma warming the lung and resolving phlegm. Some people usually have a fiery constitution, sweating, anxious temper, dry stool, dry mouth, dry nose, cough with little phlegm or sticky phlegm that is not easy to get out, coughing continuously after a cold, checking the blood picture and chest X-ray are generally normal, using antibiotics and cough suppressant drugs such as dextromethorphan and codeine are not effective, need to use Chinese medicine in time to adjust the constitution.