Now let me talk about the symptoms of tuberculosis. Tuberculosis is a chronic infectious disease caused by Mycobacterium tuberculosis, which can invade many organs, with pulmonary tuberculosis being the most common. The main symptoms are respiratory symptoms and systemic symptoms. The respiratory symptoms are mainly manifested as coughing, expectoration for more than two weeks, or blood in the sputum, which are common suspicious symptoms of pulmonary tuberculosis. Generally, the cough is mild, either dry or with a small amount of mucus. When cavities form, the amount of sputum may increase, and if there is a secondary bacterial infection, the sputum may become purulent. If there is concomitant bronchial tuberculosis, it will manifest as an irritating cough. About one-third of patients will experience hemoptysis, and some may experience massive hemoptysis. If the tuberculosis lesions involve the pleura, it can manifest as chest pain. Dyspnea is more common in patients with caseous pneumonia or those with a large amount of pleural effusion. These are local symptoms. Systemic symptoms mainly manifest as fever, which is the most common manifestation, often as long-term afternoon fever, meaning it begins to rise in the afternoon or evening, drops in the morning, and then returns to normal. Some patients may also experience fatigue, night sweats, loss of appetite, weight loss, etc. Women of childbearing age may experience menstrual disorders, etc.