Traditionally, chest radiographs are used for screening chest diseases during health checkups, which are convenient and quick. However, as the incidence of lung cancer increases year by year, traditional chest X-ray has disadvantages such as poor clarity and low resolution, and for early lung cancer less than 1 cm and precancerous lesions such as adenoma-like atypical hyperplasia, chest X-ray is easy to miss the diagnosis. Therefore, it is recommended that for people with high risk of lung cancer, such as long-term smokers, long-term smokers in the family, family history of tumor, history of exposure to harmful substances, and people with long-term chronic cough, chest CT examination is recommended instead of chest X-ray in order to detect smaller lung nodules. For patients whose physical examination chest CT shows hairy glass-like shadow of about 1cm in size, the percentage of early lung cancer is as high as 80%. The treatment effect of lung cancer is closely related to the stage of lung cancer, and the stage of lung cancer is closely related to the size of lung cancer mass. For such patients, our department adopts thoracoscopic minimally invasive surgery with good surgical results and almost no recurrence after surgery.