Most of the ground glass shadow-like nodules in the lungs are lung cancer (50-75%), and some are benign lung lesions. If the nodules appear to increase in size during follow-up and observation, they should be surgically removed. As for the choice of surgical approach, since the lesion may be benign, or even if it is a lung cancer, it may be an early stage lung cancer without combined microvascular invasion, these can be removed without lobectomy, and local excision (peri-pulmonary field 1/3) or segmental excision (middle and inner 2/3 of the lung field) is sufficient. Thus, local excision poses another problem, namely, how to localize the lesion during surgery. If the lesion is not immediately adjacent to the pleura, the lesion cannot be detected by the naked eye or thoracoscopy alone, and can only be palpated by hand. Not to mention that the thoracoscope cannot be touched by hand, even if the chest is open, careful touching of the lung by hand may not be able to accurately touch the location of the lesion. This causes localization difficulties for the surgeon, sometimes forcing the removal of the lung lobe where the lesion is located. If the lesion is benign or of low malignancy, it causes unnecessary expansion of the operation; even so, the pathologist will have great trouble finding the lesion after the operation. Do we have to wait until the tumor grows and can be touched by hand or can be seen before surgery? Wouldn’t that delay the best time for treatment? Various methods of preoperative and intraoperative image localization have solved this problem. There are various localization methods, the most common one is to leave a localization needle before surgery and apply methylene blue staining. There are several types of localization needles, but the basic principle is that a barbed needle acts as an anchor in the local lung tissue to prevent displacement. The needle is placed in or near the lesion, and during surgery, the soft wire or wire at the end of the needle or the site of methylene blue staining is used as the center of a large local excision, which is sent for pathological examination, and further lobectomy + mediastinal lymph node dissection is decided according to the pathological results. This greatly facilitates the operator, saves operative time, and avoids unnecessary lobectomy.