In order to strengthen the academic exchanges between medical institutions at all levels in our city, improve the standard diagnosis and treatment of the majority of clinicians and the level of diagnosis and treatment of blood, respiratory, infection, severe and difficult diseases. The fourth session of the series of seminars on Standardized Diagnosis and Treatment of antifungal infections, sponsored by Chengdu Hi-tech Medical Association, was successfully held online on April 8, 2024, with more than 50 participants online. This meeting hired experts in blood, respiratory, infection, critical care and related fields inside and outside the province to teach, the content involves a wide range, closer to the clinical, has a strong advanced, practical and controllable, worthy of the majority of primary doctors to learn.