The clinical characteristics of bronchiectasis: a. recurrent cough, coughing up large amounts of pus sputum, coughing may be related to the change of position, that is, when the patient changes position, the symptoms of coughing are more obvious, sputum can even reach more than 150 ml a day, sputum can be stratified into four layers. Second, recurrent hemoptysis, more than 50% of patients have different degrees of hemoptysis, less is blood in sputum, a large hemoptysis can reach 100ml of blood, and there are patients who have recurrent hemoptysis as a symptom, there is no other cough, cough symptoms. Third, recurrent lung infections, that is, repeated pneumonia in the same area, and the pneumonia is not hobby. The signs are typical of a fixed and persistent restricted rales that can be heard in the lungs. However, some patients with bronchiectasis have no symptoms in the early stage, and the clinical features are not typical, and are found during the patient’s physical examination.