1.Definition Expansion training for specific areas of the lung in response to possible hyperventilation in certain areas of the lung. 2, indications and contraindications (1) Indications: post-surgical and other causes of pulmonary atelectasis or chest wall fibrosis. (2) Contraindications: refer to abdominal breathing training. 3.Equipment and appliances No equipment is required. The therapist or the patient should place the hand on the area to be strengthened for breathing training, and ask the patient to breathe deeply, and apply local pressure on the chest when inhaling. 5. Precautions (1) The training environment is quiet to avoid excessive disturbance to the patient. (2) Patients wear loose clothing and adopt a comfortable and relaxed position. (3) In addition to breathing exercises, the patient can also do moderate aerobic training, such as walking, climbing steps, tai chi, etc., and also pay attention to improving nutrition and changing lifestyle habits (such as quitting smoking), etc.