According to different clinical manifestations, Chinese medicine classifies chronic bronchitis into the following types: 1. phlegm-dampness in the lung type: cough with sputum, white, thin or sticky sputum, and not easy to cough up, accompanied by fullness in the chest and epigastrium, tiredness in the limbs, loose stools, a dentate tongue, and a fat tongue; 2. phlegm-heat in the lung type: cough with mainly yellow sputum and sticky and not easy to cough up, with pus green sputum, accompanied by red face, thirst and other symptoms of lung heat; 3. The cough is mainly dry, with no phlegm accompanied by redness of the cheekbones, heat in the heart of the hands and feet, night sweats, dry mouth and thirst, and the tongue with little moss.