The 1.3mm ground glass nodule foci remain unchanged for two years without treatment, and can be observed and followed up for the time being. The 1.3mm ground glass nodule foci remain unchanged for two years means that the nodule has not grown and changed, generally benign foci, may be inflammatory foci, fibrous foci, benign tumors in the lungs, etc. caused by ground glass nodule shadow, usually does not cause any clinical manifestations of the patient, but need to be reviewed regularly to observe the size of the nodule and the composition of the changes. If they are malignant, they usually change within 2 years and need to be treated promptly. If there is a rapid increase in the size of the ground-glass nodule shadow, changes in the solid component of the nodule, and the patient develops corresponding clinical symptoms during the follow-up process, further examination, such as surgical biopsy, should be performed to clarify the nature of the ground-glass nodule shadow and to decide on the next step in the treatment plan. Patients with unchanged 1.3-mm ground-glass nodules for two years should be actively followed up and observed according to the doctor’s advice, and should also actively consult the doctor for regular treatment under the doctor’s guidance when they become physically unwell.