Inclusion Criteria:  Patients who are diagnosed with non-small cell lung cancer with clear pathological cytology by fiberoptic bronchoscopy and CT, and plan to undergo lobectomy or segmentectomy under general anesthesia for tracheal intubation; Age 18-80 years old; Those who have stable vital signs and can participate in this research; Pulmonary function test FEV1/FVC>0.8. Volunteer to participate in this research and sign an informed consent form.  Exclusion Criteria:  Pneumonectomy patients; Wedge resection patients Patients with distant metastasis of cancer; Patients with other malignant tumors; Severe complications occurred during the operation, and respiratory function training and testing are not allowed before and after Evaluator; Patients with severe physical or mental illness who cannot cooperate with the test; Patients with pacemakers, active tuberculosis, and pneumothorax.