To see the lung is usually to see the respiratory medicine department, which is called the pulmonary disease department in Chinese hospitals. To go to the respiratory medicine department for examination usually have to do related tests to understand the situation. First, blood tests can be done to look at routine blood and tumor markers to understand if there is a tumor or lung infection. Secondly, radiographic examinations, including chest X-ray and lung CT, can be done to understand whether there are lung infections, tuberculosis, lung tumors, lung expansion, and bronchial inflammation. Third, fibrinoscopy, which can clearly understand the lung disease, can also be done under the fibrinoscope pathological examination to clarify the diagnosis of the disease.