A Single-center Study on the Effect of Systemic/Selective Lymph Node Dissection on the Prognosis of Ground Glass Nodules Smaller Than 3cm and With Components With Consolidation/Tumor Ratio Between 0.5-1

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.