Inclusion Criteria:  Patients enrolled in the study must meet all of the following conditions:  1.Aged between 25 and 75 years; 2. GGO is diagnosed by thin-section lung CT (thickness <1.5mm) within one month before surgery; 3. The maximum diameter of the GGO is smaller than 3cm; 4. The solid component in GGO between 50%-100%; 5. Preoperative examination showed that the patient could tolerate lobectomy; 6. The patient is able to understand and comply with the study and has provided written informed consent.  Exclusion Criteria:  Patients meeting any of the following criteria are not eligible for this trial:  1. Patients with a history of lung surgery; 2. Postoperative pathology showed non-primary lung cancer; 3. The scope of surgical resection is larger than one lung lobe; 4. Patients with a history of other tumors; 5. Patients with severe complications (coronary heart disease, valvular heart disease, end-stage renal disease, severe liver cirrhosis); 6. Unable to cooperate with the researchers because of dementia or cognitive decline 7. Other situations that are not in conformity with the standards and requirements of this trial.